link no. 59 customer magazine spun yarn systems - Rieter

The customer magazine of Rieter Spun Yarn Systems
Vol. 24 / No . 59 . May 2012 / EN
link 1
/2012
04 TRENDS & MARKETS Rieter – with full power for the textile world 06 PRODUCT NEWS
Recovering good fibers from blowroom waste 14 New R 60 Rotor Spinning Machine –
Technological Progress 28 PARTS Precise Spindle Monitoring with ISM

2 LINK 59 . 1 /2012
CONTENTS 03 EDITORIAL
Ready for the Future
Cover:
The new R 60 rotor spinning machine
proves its benefits in practice.
Publisher:
Rieter Spun Yarn Systems
Editor-in-chief:
Marketing Spun Yarn Systems
Copyright:
© 2012 Maschinenfabrik Rieter AG,
Klosterstrasse 20, CH-8406 Winterthur,
www.rieter.com, rieter-link@rieter.com
Reprints permitted, subject to prior approval;
specimen copies requested.
Design and production:
Marketing Rieter CZ s.r.o., P. Bielik
TRENDS & MARKETS
04 Rieter – with full power for the textile world
Erwin Stoller, President of the Board of Directors
and Executive Chairman of Rieter, comments on the
strategic reorientation of the Group and the resulting
benefits for the customers.
PRODUCT NEWS
06 Recovering good fibers from blowroom waste
With a recycling line, valuable good fibers can be
recovered – sustainability that pays off.
08 C 70 – Success through Cutting Edge Technology
11 Automation in Combing
14 New R 60 Rotor Spinning Machine – Technological
Progress
The new spinning box of the R 60 rotor spinning
machine improves spinning stability and reduces
energy consumption.
16 Automation with Rieter SERVOtrail
18 Profitable Ring Spinning has a Name:
Rieter G 32
TECHNOLOGY
20 ComforJet® yarn convinces users
21 4 spinning systems in the Rieter SpinCenter
22 Processing of Indian Cotton
PARTS
28 Precise Spindle Monitoring with ISM
The individual spindle monitoring ensures competitive
advantages, also in retrofitting. It improves productivity
and quality.
29 Innovative Retrofits for Draw Frames
RIETER INSIDE
30 The Comfort of Competence – the video clip
31 Presentation of the Rieter Award in Vietnam

Ready for the Future
Recent months were characterized by great uncertainty, although the
outlook was generally not so bad. In this environment, companies that
build on sustainability are particularly able to hold their ground. Sustainability
not only in the sense of environment protection but in the
development of lasting competitive advantages.
Rieter competence
can be experienced at
the ITMA Asia 2012 in
Shanghai – Hall W 2
Stand A 10 with all 4
spinning technologies.
Irrespective of whether the future looks rosy or uncertain,
successful companies continuously work on
improving their competitive situation.
In yarn production, relatively few factors are decisive:
productivity, material exploitation, energy consumption
and yarn quality. If these are positively further
developed and thereby the competitiveness sustainably
improved, it is easier to ensure success.
Rieter develops its products in this direction. In
this edition of the Link, we are presenting several
examples of how sustainable improvements can be
achieved with new, innovative products or with the
retrofitting of existing machines.
With a recycling line, valuable raw materials can be
regained and material costs reduced.
LINK 59 . 1 /2012
EDITORIAL
The new generation of the wide card sets new records
in productivity, quality and energy-saving.
Practical experience with the rotor spinning machine
R 60, presented on the occasion of the ITMA 2011,
substantiates the potential for softer yarns, higher
productivity and better quality – and that with a lower
energy consumption.
The customized Rieter automation between flyer and
ring spinning machine lowers costs and increases safety.
The same is achieved on the one hand with spindle
monitoring, which is also worthwhile as a retrofit,
and on the other hand with an upgrade for draw frames
that improves the quality and operational safety.
Over and above the product range, Rieter supports
its customers with comprehensive services. As an
example for technological competence, an article in
this edition describes the findings of an extensive
analysis on the subject of the processing of cotton
with a high proportion of short fibers. With tests in
the Rieter SpinCenter using all 4 spinning technologies,
this can be understood “live”.
For example, the support also includes the awarding
of yarn licenses, active communication of the Rieter
yarns and help with yarn marketing.
The overall competence of Rieter that makes life easier
for customers and can guide them along the path
to success can be experienced at the ITMA Asia 2012
in Shanghai on the Rieter Stand No. A 10 in Hall W 2.
Those who use Rieter competence simplify the way
to achieving sustainable competitiveness.
12-101 •
Edda Walraf
Head Technology and Marketing
Winterthur
edda.walraf@rieter.com
3

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TRENDS & MARKETS
Rieter – with full power for
the textile world
A year ago, in April 2011, our company embarked on an historical course:
the shareholders approved the proposal of the Board of Directors to
split the Rieter Group and to operate the textile machine and automotive
supply businesses as independent listed companies. Rieter has since
become a branch-focused supplier of textile machines and technology
components for staple fiber spinning plants. We run the company in two
business groups: Spun Yarn Systems (machinery business) and Premium
Textile Components (components business). What strategic goals do we
follow with the newly formed company and what benefits does this bring
our customers?
Rieter invests in the expansion of production capacity in Changzhou, to be closer to the customers in the important Chinese market.
The separation of the Rieter Group was a huge
strategic step for our company with its rich tradition.
For the customers and employees, however,
it brought no revolutionary change. That was never
our aim. Rather, we are pursuing a long-term oriented,
evolutionary further development that benefits
all our stakeholders.
What has led us to initiate these changes? The focus
on business with textile machines and technology
components brings Rieter a number of advantages.
It allows us at a strategic level to more clearly position
Rieter in the markets and to act more flexibly.
This also applies to the capital market.

On the one hand, we are able to more precisely define
our business model to the shareholders as a result of
the branch focus. On the other hand, the new organizational
structure with the two business groups Spun
Yarn Systems and Premium Textile Components creates
greater transparency.
2 business groups for the clear orientation on both
our customer segments
Primarily, however, these changes benefit our customers.
We can strategically concentrate on one business
area and thereby carry out our decision-making
processes more quickly and thoroughly as well as specifically
using our resources. With the focus of our
company on the two business groups, Spun Yarn Systems
and Premium Textile Components, we take full
account of the differences between these two business
spheres. The organizational innovations reflect
a development that we have actively promoted in recent
years. Alongside our established business with
textile machines under the Rieter trademark as well as
the associated spare parts and service activities, we
have systematically expanded the business with technology
components for staple fiber spinning. The business
group Premium Textile Components, together
with the strong trademarks Bräcker, Graf, Novibra and
Suessen, is one of the worldwide biggest suppliers
in this field. As an independent organizational unit,
Premium Textile Components is largely independent
from Rieter’s machine business, both strategically
and financially. It serves not only spinning plants but
also machine manufacturers; one of them is Rieter itself.
The positive development of demand in both our
segments, the machine business and the component
business, has shown us that we are on the right path
with this orientation.
Business expansion for the benefit of our customers
Rieter has a solid balance and the long-term financing
of our projects is secured. We now have the strategic
flexibility and the financial strength to position our
business for a continuing successful future. Rieter will
continue to grow in the coming years with products
for our customers in markets in the traditional countries
as well as in markets with the biggest growth in
China and India.
LINK 59 . 1 /2012
TRENDS & MARKETS
To achieve this, we have set ourselves 3 strategic
goals:
• We want to remain number 1 in the premium segment
and in the middle segment to become at
least number 2.
• We want to expand our position in China and India.
This also includes a specific product range for the
growing domestic markets.
• We want to close gaps in our product range, with
our own innovative force, but also by exploiting
external opportunities for growth.
Where do we stand today, when judged on these lines,
and how was our start as a newly formed company?
As far as the market environment was concerned, the
business year 2011 was anything but easy. Rieter,
however, performed well. With a solid financial basis
and a strong market position, we intensified our investment
activities in 2011 in order to give impetus
to achieving our strategic goals. Both business groups
expanded their production capacity in the big growth
markets China and India, to become even closer to the
customers and to ensure delivery capability. With specific
products, we were increasingly able to win customers
who produce yarns for the domestic markets
in both countries. Equally, we accelerated our investment
activities and significantly increased investments
in research and development.
Rieter will continue the intensified investment activities
in the business year 2012 and has already set
aside substantial means – for the benefit of our customers
in both market segments, the machine business
as well as the component business.
12-102 •
Erwin Stoller
President of the Board of Directors
and Executive Chairman
5

6 LINK 59 . 1 /2012
PRODUCT NEWS
Recovering good fibers from
blowroom waste
Good fibers can easily be recovered from blowroom waste with the
Rieter Recycling Line. These raw material savings make a significant
contribution to a spinning mill’s operating profits.
Fig. 1 The recycling
line can simply be
added to the existing
VARIOline.
Blowroom / card waste
To fiber separation
From central extraction
Option: press
Processing blowroom waste in the Rieter Recycling
Line can make an important contribution here. The
basic idea is to recover long fibers from the waste and
feed them back into the production line. Depending
on the spinning process and the trash content of the
cotton, the investment in the additional blowroom
machinery pays for itself within a year.
The spinning industry continually has to address the
following challenges:
• availability and cost of raw material
• rising energy costs
• availability and cost of personnel
• financing and payback on investment
The recycling line – from the systems supplier
As a systems supplier for all four spinning technologies,
Rieter offers individually tailored solutions to
improve the economics of a spinning mill. One example
is the Rieter Recycling Line. This processes and
separates the individually collected waste from the
different machines in the Rieter VARIOline blowroom
line and the cards. This always pays off – not only
when raw material is scarce and prices are therefore
rising (Fig. 1).
Treating cotton from blowroom waste
The basic idea of treating blowroom waste is to recover
long fibers from the waste. Spinning mill waste
is subdivided into two categories for the spinning
process:
• recyclable waste (fiber length > 12.5 mm)
• non-recyclable waste (fiber length < 12.5 mm).
The recyclable fibers can be fed back to the blowroom
continuously or batchwise after recovery. These fibers
can be used as raw material for coarse-count rotorspun
yarns and for ring-spun yarns in the medium count
range.

WASTE COMPOSITION IN THE BLOWROOM, MEASURED WITH THE SHIRLEY
ANALYZER
Content [%]
Trash content [%]
300 000
200 000
100 000
0
Rotor-spun yarn, Ne 7-10, 1 200 kg/h,
1 assortment, trash content ~3 %
Fig. 2 Composition of blowroom waste.
Carded ring-spun yarn, Ne 20-30, 1 200 kg/h,
2 assortments, trash content ~8 %
Blowroom waste
Fiber content [%] Loss [%]
COMPOSITION OF FIBER CONTENT IN BLOWROOM WASTE, MEASURED
WITH THE ALMETER
Content [%]
Rotor-spun yarn, Ne 7-10, 1 200 kg/h,
1 assortment, trash content ~3 %
Fibers < 12.5 mm [%]
Carded ring-spun yarn, Ne 20-30, 1 200 kg/h,
2 assortments, trash content ~8 %
Blowroom waste
Fibers > 12.5 mm [%]
Fig. 3 Composition of fiber content in blowroom waste.
POTENTIAL SAVINGS – COTTON > 12.5 MM (WASTE: VARIOLINE)
(24 H/D; 350 D/A; COTTON PRICE 2.10 USD/KG)
USD p.a
10,00
8,00
6,00
4,00
2,00
0,00
2,00
1,50
1,00
0,50
0,00
Rotor-spun yarn, Ne 7-10, 1 200 kg/h,
1 assortment, trash content ~3 %
Fig. 4 Potential savings – cotton > 12.5 mm.
Carded ring-spun yarn, Ne 20-30, 1 200 kg/h,
2 assortments, trash content ~8 %
Process
Joachim Maier
Dyrk Saaro
LINK 59 . 1 /2012
PRODUCT NEWS
Raw material savings
Examples are given of raw material savings in two
spinning processes:
• rotor-spun yarn / carded cotton / Ne 7-10 / staple
length 1" / 3 % trash content in the bale
• ring-spun yarn / carded cotton / Ne 20-30 / staple
length 1 1/8" / 8 % trash content in the bale
The adjoining chart shows the expected raw material
recovery compared to the aggregate waste from the
blowroom line. In this example the composition of
the blowroom waste is approx. 80 % trash and 20 %
fibers (Fig. 2).
The recyclable fiber content is between 75 and 80 %.
These good fibers can be fed back into the production
line (Fig. 3).
Potential savings by a spinning mill
The calculation of potential savings has been based
on a cotton price of 2.10 USD/kg. When reducing
costs by saving raw materials in this way it is quite
possible under favorable market conditions for the investment
to pay for itself within a short time. In this
example, capital expenditure on the additional blowroom
machinery for the recycling line amounts to
approx. 170 000 USD. Even a relatively simple calculation
produces an informative result. If the good
fibers recovered during a spinning process for carded
ring-spun yarn, for example, have a trash content
of 8 %, the investment pays for itself within one year
(Fig. 4). 12-103 •
Senior Marketing Manager
Winterthur
joachim.maier@rieter.com
Technologe Putzerei
Winterthur
dyrk.saaro@rieter.com
7

8 LINK 59 . 1 /2012
PRODUCT NEWS
C 70 – Success through Cutting
Edge Technology
With the foray into the application area of rotor and synthetic fibers,
the operational field of the C 70 is complete. In terms of performance,
quality and energy consumption it sets new standards.
Fig. 1 Quicker and
easier replacement of
the inserts for variable
trash removal.
Since the market launch of the C 70 card in 2010 in
qualitatively superior segments such as combed and
carded ring yarns, its operational range has been
systematically extended. With the more than 600
C 70 cards sold in the meantime, Rieter has sold totally
more than 5 000 cards with the 1.5 m card technology.
Confirmation of the accuracy of the future-oriented
1.5 m carding technology was underlined by the fact
that during the ITMA 2011 in Barcelona, no exhibitor
showed a card more than 1 m wide.
C 70 – the new standard
Both in direct comparison with the latest card generation
of other suppliers and with the latest version
of the C 60 card, the C 70 has proved its position as
performance leader.
In a direct comparison using Viscose, the C 70 has
clearly relegated its latest rivals to 2nd place. As regards
production and quality, it was shown that the
C 70 sets new standards. The yarn count of the spun
rotor yarns was in the range Ne 30 – 50. The following
results were achieved (Fig. 2):
• At 20 % higher production, a 30 % improvement in
quality was reached.
• Both the evenness of the spun yarn and its
strength were better than those of competitors.
At one customer in Turkey, technology trials were carried
out with the latest version of the C 60 and a C 70
in order to compare production performance and quality.
The plant processes 100 % US cotton to knitting
and weaving yarns in a fineness range Ne 24 – 30. For
the comparison trials, an OE yarn with a yarn count
of Ne 30 was spun on the Rieter R 40 rotor spinning
machine. Summarizing the testing period, it can be
stated that:
• the C 70 achieved a 25 % better quality at equal
production,
• with the production increase of +60 % the C 70
reached the same quality values as the C 60.
Success factors
The key to this success can be found in a combination
of various factors. On the one hand, the working
width of 1.5 m provides the optimal basis for maximum
performance. In combination with the high precision
in the area of the carding gap and the maximal
active carding area of all cards (32 flats in working
position with a working width of 1.5 m), the C 70
thereby becomes a benchmark.
Optimal raw material exploitation as well as flexible
adaptation to various raw materials is achieved by
selective trash removal. It contains the following features:
• Infinitely adjustable knife on the licker-in.
• Q-package with 4 inserts for optimization of the
extracted waste.
• Infinitely adjustable flats speed that is directly
entered at the controls.
The IGS system (integrated grinding system) sharpens
not only the cylinder clothing but also the flats
throughout their service life with intelligently distributed
grinding cycles and thereby maintains the sliver
quality at a high level. In addition, the durability of
the clothings increases by up to 20 %.
The modular construction permits quick adjustment
to new raw materials and requirements. The replacement
of the licker-in, flats and doffer clothing is
time-consuming maintenance on conventional cards.
The modular construction of the C 70 reduces these
downtimes to previously unequalled minimal levels.
All three modules can be even more easily replaced
with prepared optional replacement models.

Economy Quality Flexibility
1
2
High output in all applications due to large active
carding area
Excellent raw material utilization with variably adjustable
knife at the licker-in and selective trash removal
(pre- and post-carding areas)
1
3
2
2
3
Large active carding area with 32 flats in
working position
Carding gap precisely adjustable within
close tolerances
5
1
4
2
LINK 59 . 1 /2012
PRODUCT NEWS
Modular construction facilitates rapid
adaptation to raw material
Shorter process with draw frame modules
4 Low maintenance costs with long clothing service life
due to IGS
4 ICG – permanently sharp clothing 5 Choice between single and triple licker-in
9

10 LINK 59 . 1 /2012
PRODUCT NEWS
Fig. 2 Two applications
in direct comparison
with competitors illustrate
the high productivity
for equal quality
and energy saving with
the C 70 card.
120
100
80
60
40
20
0
C 70
160
140
120
100
80
60
40
20
0
C 70
140
120
+115 %
65
+20 %
100
Competitor
Energy efficiency in carding has a name – C 70
With its high production performance and the innovative
machine cross-section, the C 70 card attains
the lowest energy consumption values per kilogram
of produced card sliver. In comparison to wider cards
with a conventional technological cross-section, the
C 70 impresses with its lower energy consumption in
the range 15 – 25 %. The following direct field comparison
confirms this statement.
ROTOR YARN 100 % VISCOSE – C 70 COMPARED TO CONVENTIONAL
1.3 M CARD
Production [kg /h]
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
-42 %
0.091
160
140
120
100
80
60
40
20
0.157
0
-16 %
128
120
100
43 433
80
60
40
20
0
153
Annual saving: 25 000 CHF
COTTON – WASTE BLEND FOR ROTOR YARNS, C 70 COMPARED TO
CONVENTIONAL 1 M CARD
Production [kg/h]
Energy consumption* [kWh/kg]
Energy costs in 1 000 CHF / year*
Competitor * based on 0.1 CHF/kWh
Costs for an 800 kg line [1 000 CHF]
59,5
102,9
Annual saving: 43 433 CHF
* based on the same number of cards
Example – Viscose application for rotor yarns
In this comparison, the cards were running with Viscose
for OE yarns. On the C 70, a 30 % better quality
was achieved at a 20 % higher production rate.
When considering the energy expenditure, the C 70
was a class ahead. It required 16 % less energy. Converted
to a year at a production rate of 1 200 kg/h,
this corresponds to an annual saving of approx.
25 000 CHF.
Example – 1 m card with cotton / waste blend for
open-end yarns
Various comparisons to 1 m cards showed an energy
saving in the range of 30 – 45 % - a remarkable
difference! This was documented by means of a field
trial whereby the C 70 with a 42 % lower energy input
achieved more than double the production with
equal quality.
Why is the C 70 more energy-efficient?
The higher production performance of the C 70 positively
affects the expended energy per kg card sliver,
kW/kg. This alone, however, is not the only reason.
With the optimal, comparatively small cylinder diameter
(816 mm), lower amounts are set in motion.
The energy expenditure required to reach the
production speed is consequently also lower. As a
result, less energy must be applied to maintain the
production speed.
C 70 – tested worldwide
Even prior to the Olympics 2012, the C 70 card was
able to prove its effectiveness worldwide in hard
Olympic comparison with more than 300 already operational
cards. 12-104 •
Gerald Steiner
Head Product Management
Blowroom / Cards
Winterthur
gerald.steiner@rieter.com

Automation in Combing
More than 50 % market share worldwide proves it – the best yarn quality
is achieved with a combing section from Rieter. What is the situation
regarding increase in productivity and flexibility that automation in
combing by Rieter has to offer?
Fig. 1 Animation of
the ROBOlap’s function
principle. Simply scan
with your smartphone
http://bit.ly/KfH8BC
It is quite possible to combine quality and production
advantages in a Rieter combing plant and for
just this reason an investment in a Rieter combing
section is worthwhile. The ROBOlap option leads to
increased productivity on the combing machine, reduces
operator effort and improves the sliver quality.
The new sliver delivery for cans with a diameter
of 1 000 mm offers a decisive economic advantage.
In this connection, an equally large role is played by
the reduction in the number of piecers on the autoleveler
draw frame by using cans with a larger capacity.
A lower number of sliver piecers leads to an
increase in yarn quality and fulfils the requirements
of the spinning plants that place value on quality.
ROBOlap, an unrivalled system
ROBOlap is an automatic batt piecing system. The
operating principle is simple: the laps are placed on
the lap rest by one of the customer-defined transport
CONSTANT QUALITY THROUGH AUTOMATION
Sliver without piecing, CVm = 3.34 %
Sliver with manual piecing, CVm = 6.42 %
Sliver with automatic piecing (ROBOlap), CVm = 4.11 %
Fig. 2 Improvement of the CV% in the comber sliver due to automatic piecing with ROBOlap.
LINK 59 . 1 /2012
PRODUCT NEWS
systems SERVOlap or SERVOtrolley. An optical sensor
registers when one of the 8 laps is being drawn
off. The rest of the 8 laps are automatically sucked
off and disposed of. A pneumatic device draws the
new batt end onto the machine and prepares it for
the piecing process by evenly detaching the batt end
(Fig. 1).
Remarkable here is that the mean waste amount is
practically halved by automatic piecing compared
to manual piecing. With manual piecing, the operators
often tend to pull off far too much of the batt. In
addition to the increased amount of waste, manual
piecings are less consistent than the automatic piecings.
With ROBOlap, the machine synchronizes all
feed movements and thereby achieves a piecer with
a significantly better CV% than with manual piecing
(Fig. 2). The empty tubes are subsequently re-fed to
the transport system.
Since its market launch, the ROBOlap batt piecing
system has gained a greater market share and today
can be found worldwide on more than 40 % of the
combing machines sold by Rieter (Fig. 3).
In the last 15 years, a shift in spinning plants from
America and Europe in the direction of Asia has taken
place. In the Asian markets, automation was for a
long time of minimal importance. Optimizations and
rationalizations, however, are now also taking place
in these markets. Rieter sees a clear trend towards
automated combers equipped with ROBOlap.
Fig. 3 Sales distribution of Rieter combers in manual and
automatic machines with ROBOlap.
Manual Combers ROBOlap Combers
1997 - 2008 85 % 15 %
2008 - 2010 70 % 30 %
2011 60 % 40 %
Compared to a comber without ROBOlap, a fullyequipped
comber allows a 2 % higher degree of efficiency.
This is due to the optimized lap changing and
piecing processes which result in extremely short
machine idle times (Fig. 4).
11

12 LINK 59 . 1 /2012
PRODUCT NEWS
Operating steps
HIGHER COMBER EFFICIENCY
Idle time [min]
0
2
4
6
8
10
12
14
Idle time
Average
Manual piecing
optimized
Fig. 4 Productivity win through automatic piecing with ROBOlap.
ROBOlap
E 66 with E 16 E 76 (ROBOlap) with E 17
guides 2 lap trolleys behind the comber guides 2 lap trolleys behind the
comber
detaching the batt and replacing the tubes fully-automatic
tubes moved onto the lap trolley at the touch of
a button
full laps delivered from the trolley to the
machine at the touch of a button
Efficiency +2 %
Time for lap change and piecing
fully-automatic
fully-automatic
piece 8 laps fully-automatic
start machine fully-automatic
clean tubes and return to comber preparation fully-automatic
Fig. 5 Comparison between manual and automatic combers with ROBOlap.
ROBOlap and SERVOlap E 26, the fully-automatic
solution
ROBOlap and SERVOlap E 26 are undisputedly the
best combination in the area of automation because
both systems function without human intervention.
The “overhead transport” takes place from the combing
preparation up to the combing machines. All
processes are conducted automatically and without
external intervention: the transport of residual material
from the tubes, the removal of the tubes from
the machine, the placing of the new laps, the piecing
process itself and the restart of the combers (Fig. 5).
97
96
95
94
93
92
91
90
Efficiency [%]
Only in the case of Rieter automation with SERVOlap
are the empty tubes automatically cleaned and refed
to the transport system – one of the many exclusive
features for Rieter customers.
ROBOlap and SERVOtrolley E 17, a combination with
manual transport
An economic combination is ROBOlap and SERVOtrolley
E 17. In the past, only the fully-automatic feed with
SERVOlap was available for combers equipped with
ROBOlap. Today, however, it is possible to operate the
combers equipped with an automatic piecing system
with the SERVOtrolley type E 17.
The difference to the SERVOlap can be found in the
lap transport that can be manually carried out with
the aid of a transport trolley, whereby 4 laps and
tubes can always be transported. The loading process
for the 4 laps onto the transport trolley is automatically
executed. The loaded transport trolley is guided
by the operator to the combing machine and precisely
positioned by a guide rail. As soon as the two trolleys
with 4 laps each reach their final position at the
comber, the automatic lap change can begin.
Mixed operation of manual and automatic combers
Until recently, the extension of a manual combing section
with automatic combing machines was undesirable
due to the necessary investments for the transport
system. The option to use the SERVOtrolley E 17 combined
with an automatic comber now makes the extension
of an already existing manual combing section
by individual combers equipped with ROBOlap attractive
and economic.
A minimal change of the already available comber
preparation E 30, E 32 or E 35 is sufficient to utilize
the machine in a mixed operation with SERVOtrolley
E 16 and E 17 (Fig. 6). The UNIlap or OMEGAlap is
then in the position to recognize the respective trolley
type for the lap feed and to thereby adjust the height
of the lap delivery, as the manual combers have a different
height to that of the automatic machines. This
permits Rieter customers to exploit the advantages of
an automatic comber without having to renew the entire
combing section.

Fig. 6 Lap change
on the E 76 comber
with ROBOlap and
SERVOtrolley E 17.
Fig. 7 Process optimization
in the spinning
plant by utilization of
uniform cans with
1 000 mm diameter.
1 000 mm CANS
Rationalizing cans with 1 000 mm diameter
The new sliver delivery for 1 000 mm can diameter
corresponds to the requirement for uniformity of the
can sizes in the spinning plant and offers unchallenged
benefits in productivity and quality. The change to
cans with 1 000 mm diameter on the comber allows
the use of uniform cans – from the card through to the
feeding of the autoleveler draw frames (Fig. 7). These
cans hold double the material quantity of the 600 mm
cans so far in use. The frequency of the can change
is thereby halved and the efficiency of the comber is
slightly raised by approx. 0.3 %. The benefit is, how-
LINK 59 . 1 /2012
PRODUCT NEWS
ever, substantially greater with the autoleveler draw
frame where the number of piecers is halved due to
the double quantity of material in the cans. The efficiency
of the draw frame consequently increases by
more than 1 % and this with a simultaneous quality
improvement.
With the presently available ROBOlap option in conjunction
with a semi-automatic transport system and
the new sliver delivery for cans with 1 000 mm diameter,
productivity and quality in combing can be
increased. 12-105 •
Yvan Schwartz
Head Product Management Combers
Winterthur
yvan.schwartz@rieter.com
13

14 LINK 59 . 1 /2012
PRODUCT NEWS
New R 60 Rotor Spinning Machine
– Technological Progress
The innovative spinning technology of the new automatic R 60 rotor
spinning machine from Rieter ensures better, more uniform and softer
yarns. The R 60 sets new standards for speed, low energy consumption
and high efficiency. At the ITMA 2011 in Barcelona, our customers clearly
recognized how easy, operationally reliable and clearly designed this
rotor spinning machine is compared to other machines.
Fig. 1 The new S 60
spinning box has been
technologically further
developed. The open
construction is advantageous
for cool delivery
nozzles, productivity
and operation.
High yarn quality is the basis for the success of
a spinning plant
The new S 60 spinning box of the R 60 features all
the proven advantages of its predecessor the SC-R
version and has been further improved.
Noticeable is the absence of a delivery tube. The new
TWISTunit of the R 60 unites delivery nozzle, TWISTstop
and channel insert in one construction. The unit and
its elements are very easy and quick to replace, even
without tools.
The new construction prevents fiber accumulations or
spinning vacuum from changing the spinning conditions.
The box no longer has any covers under which
fibers can accumulate. The optimized spinning geometry
reduces the spinning tension and improves the
spinning stability. This can clearly be seen with critical
applications such as soft-turned yarns or with the
increased use of short fibers such as comber noil, card
and blowroom waste. Thanks to the “cool nozzle technology”
heat dissipation to the nozzle is good which
leads to a cooler surface. This provides further potential
for higher productivity with synthetic fibers and
their blends.
New spinning technology for superior yarns and
lower energy consumption
Several customers could already experience the
technological benefits of the new spinning box in the
form of better yarn strength and evenness. In direct
comparison to the latest competitor models, the innovative
spinning technology of the R 60 is already
a step ahead by up to 0.75 cN/tex and by 20 % higher
IPI values. In the example shown (Fig. 2) – Ne 17
weaving yarn of 100 % cotton – this advantage in
strength can be transformed into a productivity increase
of 9 %. The originally required yarn strength
can be achieved by a constant rotor speed with appropriately
lower twist. This additionally results in a
further reduction of the energy consumption per kg
of yarn to an equivalent of 9 %.
Savings with raw material
Again the further developed Rieter spinning technology
proves its strength, particularly with a high proportion
of short fibers or with a high trash content in
the feed sliver. The adjustable bypass, the reduced
spinning tension and the new automatic, individual
centering of the exit nozzle and rotor improve the
spinning stability. The mechanical rotor cleaning by
the robot with the unique VARIOclean is effective
with every piecing and doffing cycle. This ensures
that the spinning position subsequently continues
production at the highest quality level with thoroughly
cleaned rotor grooves.

R 60 – Nm 28 / Ne 17, 100 % COTTON WEAVING YARN
R 60
3,6 4,0
Twist factor
[αe]
Fig. 2 The improved
spinning technology of
the R 60 brings significant
benefits for quality and
productivity.
Competitor
14,3 13,7
Yarn strength
[cN/tex]
16
Total
IPI
17
180
165
Delivery speed
[m/min]
Piecing quality is particularly important with a high
rate of yarn breakages
The ends down rate when spinning with the R 60
is reduced by lowered spinning tension. The 25 %
quicker robot, in comparison to the R 40, can deal
with a far greater number of ends down and maintain
the high efficiency of the machine. The robots need
only 20 seconds for the complete cycle including
complete rotor cleaning and doffing. With the unique
AEROpiecing® technology, almost yarn-like piecings
in mass and strength are achieved. Only this can prevent
more piecings generating substantial costs in
downstream processing.
Faulty piecings create high costs
A sample calculation shows the following: a typical
Ne 12 denim weaving yarn contains around 0.5 piecings
per kg of yarn. Just one yarn break in the weaving
plant today costs – worldwide – approx. 2 EUR,
as alongside the efficiency, the fabric quality is very
quickly also influenced. Such faults in the fabric are
paid for by the buyers with expensive compensation.
Under these circumstances, with only a 1 % lower
rate of faulty piecings in the weaving plant, already
0.01 EUR per kg of yarn can be saved. This leads to
significant savings or even better, to higher profits
for the spinner.
LINK 59 . 1 /2012
PRODUCT NEWS
Central drive consumes less energy
The modern concept of the R 60 was specifically optimized
for low energy consumption. The greatest
energy consumers of the rotor spinning machine are
the drives for rotor, suction and opening rollers. For
the rapidly turning rotors and opening rollers, optimized
tangential belt drives have continued to prove
energy saving. For the central suction the R 60 exhibits
advantages, as the electronically-controlled
vacuum combined with the automatic filter cleaning
avoids unnecessary losses.
The life cycle of the electronic components can be
extended by specific heat dissipation. For instance,
in the R 60 the drive inverters were concentrated in
an area that is specifically cooled by innovative heat
dissipation.
Measurements taken at customers have, in comparison
to competitive machine concepts, confirmed energy
consumption at least 10 % lower.
The longest machine offers flexibility with
independent sides
With up to 540 rotors, the R 60 is the longest rotor
spinning machine on the market. With independently
producing machine sides, it can still be as flexibly operated
as a short machine.
Producing two different yarn qualities on one machine
could create the risk of confusion. On the R 60 this is
excluded by the double tube loaders, the two package
transport belts and the clear allocation of the machine
sides on the display.
12-106 •
Dr. Stephan Weidner-Bohnenberger
Head Product Management Rotor Spinning
Ingolstadt
stephan.weidner-bohnenberger@rieter.com
15

16 LINK 59 . 1 /2012
PRODUCT NEWS
Automation with Rieter
SERVOtrail
Automation in the ring spinning mill is a worldwide trend. By means of an
optimal material flow between roving frame and ring spinning machine,
quality improvement and higher production with consecutive personnel
savings are achieved by the manual, semi-automatic and fully-automatic
SERVOtrail transport systems.
Fig. 1 Safer bobbin
transfer, dependable
tube cleaning, rails that
do not become dirty
and easy storage are a
matter of course with
Rieter SERVOtrail.
In the spinning preparation through to the roving
frame, a qualitatively superior roving is produced
with Rieter machines. Unfortunately, the roving
frame bobbins are then often treated inexpertly.
They are stacked up on top of each other in the trolley
for intermediate storage. Consequently, the top
layer of the soft-turned roving is partially damaged
and soiled. This loss in quality of the roving bobbins
has a negative effect on the subsequent process.
Perfect material flow from roving frame to the spinning
machine
With a Rieter SERVOtrail system the ring or compact
spinning machines are perfectly supplied with the
roving frame bobbins – without compromising on
quality. The roving frame bobbins are not touched
on the surface but the inner tubes are held and are
thereby moved into the ring spinning machine without
any damage occurring. This ensures that the previously
achieved quality of the roving is also maintained
between the roving frame and the ring spinning machine.
Flexible automation stages – according to requirements
Rieter offers manual, semi-automatic and fully-automatic
transport systems for the material flow between
roving frame and ring spinning machine. According to
requirements, Rieter customers can select the level
of automation that is most suitable for their spinning
plant. For spinning plants with primarily the same
assortment range, the Rieter SERVOtrail continuous
is suitable. For frequent changeovers of fiber mix
in the plant, the Rieter SERVOtrail flexible is beneficial.
With the help of profitability analyses, Rieter
can calculate for the customers the return on investment
and thereby supports customers in evaluating
the most suitable transport system.
Open and easy to clean
In textile machine engineering, soiling in the spinning
plant is one of the greatest challenges. Fiber
fly and fluff intrude everywhere, even in practically
closed profiles where the rollers are inside. For this
reason, Rieter decided in favour of using an open rail
profile for the SERVOtrail guide rails.
The advantages of the open profile are:
• The rails and trains in the ring spinning machines
are automatically cleaned by the traveling cleaner.
• The cleaning of the unit is possible during operation
without removal of parts.
• Inspections and maintenance are easy and quickly
made without removal of trains, as the elements
are visible and easily accessible.

Fig. 2 With SERVOtrail
the roving frame
bobbin logistics for all
ring spinning machine
models from Rieter can
be flexibly automized:
G 32, G 35 and K 45.
SERVOtrail – benefits at a glance
What distinguishes the design of the Rieter SERVOtrail?
Which advantages result for the customers?
• The lightweight aluminium construction simplifies
overhead positioning.
• The units are practically maintenance free.
• The new friction wheel drives are self-adapting,
wear resistant and maintenance free.
• The bearings of the castors are especially dustprotected.
• The new lightweight castors guarantee simple and
easy pulling of the trains with the roving frame
bobbins.
Material residue on the roving frame bobbins consists
of fibers that can be reused. Here the Rieter bobbin
stripper comes into action. It effectively cleans the
bobbins and thereby opens the roving so well that the
fiber material can be simply refed into the spinning
process.
Service across all continents
Rieter provides a constant worldwide service network.
Thanks to modern data technology, a remote
analysis is possible with SERVOtrail. Through the
connection of the SERVOtrail drive to Internet via a
secure VPN line, a remote analysis is possible:
Tom Hanrath
LINK 59 . 1 /2012
PRODUCT NEWS
• The visualization shows the entire plant with all
components. This is impossible for tabular displays.
Display of the visualization is easily configurable.
• The data of the SERVOtrail plant is transferred live
in realtime and allows a rapid plant analysis.
• A direct access to the drive facilitates intervention
by Rieter service technicians, wherever the service
technician happens to be located worldwide.
With SERVOtrail, Rieter offers very flexible automation
solutions for every requirement. Through the
optimal material flow between roving frame and
ring spinning machine, the manual, semi-automatic
and fully-automatic SERVOtrail transport systems
achieve an improvement in quality and an increase
in production.
12-107 •
Project Manager Schönenberger
Systeme GmbH
Landsberg am Lech
t.hanrath@schoenenberger.de
17

18 LINK 59 . 1 /2012
PRODUCT NEWS
Profitable Ring Spinning has
a Name: Rieter G 32
In the textile industry, the name Rieter stands for innovation and dependability,
for system supplier and technological competence. This
reputation is based on the continual, coordinated development of all
system-relevant machines for the customers’ benefit.
Fig. 1 G 32 Ring
spinning machine –
high-quality yarns economically
produced.
Scientific analyses and physical basis research generally
form the initial stage of a new development;
new production techniques allow the realization and
a very well trained, customer-orientated service ensures
the recognized high availability of the entire
systems. Rieter utilizes this potential to increase the
performance of all system components without relinquishing
the economic benefits for the customers.
Adaptable solutions for the specific environment of
the customers ensure their profitability. A good example
is the G 32 ring spinning machine.
This machine has been designed as an economic solution
where the customer does not have to forego
the familiar quality. Unique technical solutions are
then integrated when the economic advantage for the
customer is obvious. New solutions are sought in cases
where existing solutions do not fulfil economic requirements.
Three fundamental requirements form
the basis running through the entire development process:
the renowned Rieter yarn quality, high dependability
and lowest energy consumption per produced kg
of yarn. In addition, the EliTe compacting system was
optionally integrated in order to create a machine basis
for conventional and compacted ring yarn.
Renowned Rieter Yarn Quality
Based on extensive analyses, the spinning geometry
was further improved with the change from the previous
G 33 model to the present G 35 standard ring
spinning machine and the Ri-Q-Draft35 resulted.
The entire know-how of this development was also
adopted as a feature of the G 32. Advantages over
other competitors are the further reduced ends down
ratio with increased speed potential.
High Level of Dependability
In the meantime, Rieter has commissioned more
than 2 000 ring spinning machines with 1 200 and
more spindles at customers worldwide. Of particular
importance here is the uniformity of the yarn quality

NE 30, 100 % COTTON, KNITTING YARN
Energy consumption [kWh/kg]
1.60
1.55
1.50
1.45
1.40
1.35
1.30
1.25
-8 %
-8 %
1.20
16 500 17 000 17 500 18 000 18 500 19 000 19 500
Rieter
Fig. 2 Practical values
in India confirm the
low energy consumption
of the G 32.
Fig. 3 G 32 with
EliTe®CompactSet and
the guide arm P3-1
from Rieter.
Competitor
Spindle speed [U/min]
and also the dependability of the components. Stateof-the-art
TITAN rings in combination with HPS-18
and HPS-25 spindles stand for extremely long life
cycles and lowest energy consumption. The cops
change system with SERVOgrip and ROBOdoff provides
greatest dependability. SERVOgrip is the description
for the controlled cops change without
underwinding in combination with adaptable twist
factor for sure separation of the yarn ends with all
yarn counts and fiber types. ROBOdoff is the widelyknown,
self-controlling and efficient doffer. The combination
ensures a very low ratio of start-up ends
down of approx. 0.7 % to 1.5 %.
Lowest Energy Consumption per kg Yarn
Rieter carried out extensive measurements under
the same conditions for its own G 32 as well as for
competitor machines. It was shown that depending
on the spindle speed, energy savings with the G 32
from 5 % to 8 %, and in some cases even higher,
could be measured.
Generally with the G 32 customers operate with up
to 15 % higher spindle speeds compared to competitor
machines, due to the improved spinning stability.
LINK 59 . 1 /2012
PRODUCT NEWS
Combined with the lower start-up and operational
ends down, the following macroeconomic advantages
could be achieved at customers:
• up to 8 % lower energy consumption per kg of
yarn [kWh/kg],
• up to 25 % more production per spindle per time
unit,
• up to 30 % lower personnel requirement per kg of
yarn.
Impressive values that in combination with the renowned
durability of Rieter machines ensure the
profitability of the investment.
Integrable EliTe Compacting System
With the construction of the G 32 attention was paid
to creating a universal machine that is designed to
cover a wide range of applications. This also includes
the integration of the Rieter core yarn system and
the well-known EliTe compacting system. The latter
is currently supplied with central suction and filter
box which guarantees lower energy costs compared
to small sectional motors as well as a high level of
dependability. A further advantage over small sectional
motors is here the modularity. The machine
can both be prepared for EliTe and also be supplied
with the integrated EliTe system. It goes without saying
that the machine can also be retrofitted on site.
Rieter has achieved a real coup with this machine.
Flexibility, yarn quality, durability and low yarn production
costs united in one system – the G 32 ring
spinning machine has rightly earned its supplementary
name: The Money Spinner. 12-108 •
Andreas Hellwig
Head Product Management Ring Spinning
Winterthur
andreas.hellwig@rieter.com
19

20 LINK 59 . 1 /2012
TECHNOLOGY
ComforJet ® yarn convinces
users
ComforJet® is the brand name of the yarn spun on the Rieter J 20 airjet
spinning machine. Various users confirm its advantages in downstream
processing and the high quality of the end products.
1
2
ComforJet®
Fig. 1 Santoni’s Atlas
HS circular knitting
machine produces at
45 rpm with Comfor-
Jet® cotton yarn.
Fig. 2 ComforJet®, the
new yarn, spun on the
Rieter airjet spinning
machine.
The new J 20 airjet spinning machine could be admired
for the first time on Rieter’s exhibition booth
at the ITMA in Barcelona. The many interested visitors
were impressed by its space-saving concept and
clearly structured operating layout. An Ne 50 cotton
yarn and an Ne 30 viscose yarn were spun simultaneously
on the completely independent machine sides.
Positive feedback from knitting mills to Hermann
Bühler Ltd
The cotton yarn was produced from raw material
from Hermann Bühler’s spinning mill in
Switzerland. This company already successfully manufactures
ComforJet® yarns on its Rieter airjet spinning
machines and is one of the first licensees of the
ComforJet® brand. Experience with purchasers of its
yarns is very positive. Renata Franz, Business Development
Manager at Hermann Bühler, comments:
“The good package build of the cylindrical bobbins
facilitates faultless take-off behavior on the knitting
machine.”
High speeds on the knitting machine impress Santoni
customers
Good running properties in the knitting mill have also
been confirmed by Italian knitting machine manufacturer
Santoni, the market leader in seamless knitting
machines. The cylindrical packages of airjet-spun
yarn were supplied by Hermann Bühler and processed
on its ATLAS HS (high speed) circular knitting
machine in the company’s test center and on its
booth at the ITMA in Barcelona.
To quote Gianpiero Valsecchi, Santoni’s sales manager:
“The high speed of 45 rpm and the extremely
low fiber fly of the ComforJet® cotton yarn in particular
fascinated us and visitors to our booth.” According
to Gianpiero Valsecchi, ComforJet® yarn enables
maximum productivity to be achieved while machine
cleaning effort is reduced at the same time. Efficiency
is improved significantly due to the very low incidence
of fiber fly.
Advantages for textile finishers and final customers
The special structure of the yarn enables size and
dyestuff to be reduced in textile finishing. Compared
to conventional ring-spun yarn, the finished fabric
impresses after washing with extremely low pilling,
lower shrinkage and very high dimensional stability.
The uniform fabric appearance and – for an airjetspun
yarn – pleasantly soft hand in the finished fabric
are further characteristic features of ComforJet®
yarn. 12-109 •
Anja Knick
Senior Marketing Manager
Winterthur
anja.knick@rieter.com

4 spinning systems in the Rieter
SpinCenter
The entire Rieter spinning process line with the 4 spinning systems, including
the new R 60 rotor spinning machine and the new J 20 airjet
spinning machine, is available for customer spinning trials in the Spin-
Center in Winterthur.
Fig. 1 Our technologists
at work in the SpinCenter
(from left to right:
Andreas Birsner,
Technologist, and Hans-
Peter Pridöhl, Head of
Customer Technology)
Customers who are interested in Rieter spinning machines
have the opportunity to arrange for trials to be
run with their individual raw material from fiber to
yarn, and even further to the end product, especially
for uncommon spheres of application, special raw materials
or new spinning processes.
The entire spinning line is available in the SpinCenter
in Winterthur for trials of this nature. This also includes
the current final spinning machines, such as
the G 35 ring spinning machine, the K 45 compact
spinning machine, and now also the R 60 rotor spinning
machine and the J 20 airjet spinning machine.
Trials can therefore be conducted on all 4 spinning
systems. This is completely unique and only possible
with Rieter.
LINK 59 . 1 /2012
TECHNOLOGY
Spinning trials tailored to individual customer needs
In consultation with our customers we decide how
much raw material is to be provided and in what
form. Careful planning and conduct of the trials, conscientious
analysis and in-house discussion of the results
culminate in an expert concluding report. This
includes the optimum settings for achieving the best
possible yarn quality. The guidelines for the customer
spinning trials comply with ISO 9000 / 9001.
Customers can test new machines and processes at
little expense
Conducting a wide range of different trials in a production
spinning mill is very costly and difficult, if not impossible.
The Rieter SpinCenter gladly accepts orders
for trials and guarantees the use of the latest technologies
in combination with Rieter technologists’ extensive
know-how. Customer spinning trials provide an
opportunity to test new processes and thus acquire
basic decision-making data for purchasing the machines
in question. The sales manager responsible is
the contact between the customer and the SpinCenter
and is pleased to receive enquiries.
It isn’t necessary to conduct a new trial on each occasion.
If similar technology trials with comparable material
have already been conducted in the SpinCenter,
the customer can benefit from Rieter’s knowledge and
experience, which is stored in our technology database
(TIS).
As a systems supplier, Rieter is the only manufacturer
of spinning machinery able to conduct trials covering
the entire spinning process, and impartially
recommend the right choice from among 4 spinning
technologies, based on the customer’s strategy and
environment. 12-110 •
Anja Knick
Senior Marketing Manager
Winterthur
anja.knick@rieter.com
21

22 LINK 59 . 1 /2012
TECHNOLOGY
Processing of Indian Cotton
How can 1 1/16" cotton with a high short fiber content best be processed?
Tests on the Rieter rotor spinning and ring spinning systems provide
indications. The possibilities and the potential of processing 100 %
cotton on a rotor spinning machine are today in the Asian countries still
far from being exhausted.
You can obtain further
details on this test in
the 20-page special
print “Processing
Indian Raw Cotton”
which you can download
in Internet using
the printed code.
http://bit.ly/ItN4Lm
Fig. 1 Areas of application
of the spinning
systems.
[1 0 0 0 0 0 0 tons]
(mm)
(inch)
RANGE OF APPLICATION OF THE SPINNING SYSTEMS FOR 100 % COTTON
5 . 0
4 . 5
4 . 0
3 . 5
3 . 0
2 . 5
2 . 0
1 . 5
1 . 0
0 . 5
0
2 3 . 0-2 5 . 4 2 6 . 1 9 2 6 . 9 9 2 7 . 7 8 2 8 . 5 8 2 9 . 3 7 3 0 . 1 6 3 0 . 9 6 3 1 . 7 5 3 2 . 5 4 3 3 . 3 4 3 4 . 1 3 3 4 . 9 3 3 5 . 7 -4 4 . 4 1
2 9 /3 2 -1 1 1 /3 2 1 1 /1 6 1 3 /3 2 1 1 /8 1 5 /3 2 1 3 /1 6 1 7 /3 2 1 1 /4 1 9 /3 2 1 5 /1 6 1 1 1 /3 2 1 3 /8 1 3 /3 2 -1 3 /4
short
AFIS Autojet; commercial staple; UQL (w) (mm)
In the processing of 100 % cotton with the rotor
spinning system, the appropriate field of application
based on economic and quality aspects lies in a staple
length range from 1" to 1 1/8" cotton. According
to the short fiber percentage and trash content of the
cotton, the rotor technology is often the only option
to produce yarn economically – and simultaneously
in the quality demanded. Depending on the staple
length of the cotton, the areas of application for the
various end spinning processes can thereby be allocated
(Fig. 1).
Up to 2010 already 7.8 million rotor spinning units
worldwide have been installed. In comparison to
the installed ring spindles, this number is small.
As, however, the productivity of a rotor unit compared
to a ring spinning unit is higher by the factor
Ring spinning
Rotor spinning Air-jet spinning
medium long extra long
SPINNING UNITS INSTALLED WORLDWIDE 2010
Total installed spinning units [million]
1 6 0
1 4 0
1 2 0
1 0 0
8 0
6 0
4 0
2 0
0
71
162
Fig. 2 Installed spinning units worldwide.
7,8
1,5
Ring carded Ring combed Rotor Air-Jet
6, this corresponds to a percentage of approx. 30 %
of the yarn production. Worldwide, rotor spinning is
an established technology that fulfils the presently
demanded high requirements for the yarn in downstream
processing (Fig. 2).
The yarn fineness with rotor technology lies in the
range from Ne 3 – 40, whereby the typical and mostly
produced yarn count is Ne 30. Yarns in this count
are primarily used in circular knitting but are also
processed in weaving (Fig. 3).
With rotor spinning, various process stages can be
selected for the processing of the fibers (Fig. 4). The
choice of the process operation with rotor spinning
depends on the yarn count to be produced and the
required yarn quality. With the processing of 100 %
cotton and a yarn count of Ne 30, a process using a
card without drafting module and 1 or 2 subsequent
drafting passages is most practical.
Test structures
To be able to show how the two spinning systems
– ring and rotor – react to an increased percentage
of short fibers, Indian Shankar 6 cotton with a relatively
high short fiber percentage was used and processed
to 8 various yarns. The yarn values of these
8 yarns were subsequently compared, so as to define
the optimal procedure for short staple cotton.

Installed rotors [1 000]
Fig. 3
Fig. 4
Short fiber content < 12.5 mm (n) [%]
Fig. 5
MAIN AREAS OF APPLICATION FOR ROTOR SPINNING
Total number of rotors installed 7 699 980
3 0 0 0
2 5 0 0
2 0 0 0
1 5 0 0
1 0 0 0
5 0 0
3 5 . 0
3 2 . 5
3 0 . 0
2 7 . 5
2 5 . 0
2 2 . 5
2 0 . 0
1 7 . 5
1 5 . 0
1 2 . 5
1 0 . 0
7 . 5
5 . 0
0
692
1 536
1 845
2 774
652
188
13
3 6 12 18
Yarn count [Ne]
24 30 40
PROCESS SEQUENCE OF THE RIETER ROTOR SYSTEM
VARIOline Card
C 70
VARIOline Card
C 70 with SB-Module
VARIOline Card
C 70 with RSB-Modul
Draw frame
SB-D 45
Shorter process
Shortest process
Draw frame
RSB-D 45
Draw frame
RSB-D 45
SHORT FIBER PERCENTAGE PER PROCESS STAGE AND YARN TYPE
100 % cotton 1 1/16", Almeter
bale after
B 12
blowroom ring
carded
after
B 60
card
input
ring
combed
Rotor spinning
R 60
Rotor spinning
R 60
Rotor spinning
R 60
carded
combed
card pre- lap combed autoleveler roving
drawframe
sliver drawframe
rotor
carded
rotor
combed
LINK 59 . 1 /2012
TECHNOLOGY
1. Ring yarn, carded, Ne 20
2. Ring yarn, carded, Ne 30
3. Ring yarn, combed, Ne 20, noil extraction 16 %
4. Ring yarn, combed, Ne 30, noil extraction 16 %
5. Rotor yarn, carded, Ne 20
6. Rotor yarn, carded, Ne 30
7. Rotor yarn, combed, Ne 20, noil extraction 14 %
8. Rotor yarn, combed, Ne 30, noil extraction 14 %
The yarns were processed using carded and combed
operations to yarn counts of Ne 20 and 30. With both
yarn types, the influence of the short fiber percentage
on the yarn values was also examined. For this
purpose, the raw material was additionally combed,
14% with the rotor spinning process and 16 % with
the ring spinning process. The card production was
adapted, depending on the end spinning system,
with 100 % kg/h for the rotor application and with
80 kg/h for the ring application.
Raw material results
The short fiber percentage of the cotton at 22 % is relatively
high. Technical measurement showed a rise in
the short fiber proportion due to the fiber interlacings
resulting from the cleaning stages in the blowroom.
This is, however, not a true fiber shortening. The reason
is that the technical measuring options available
also record fiber interlacings as short fibers.
During the carding process, a parallelization of the fibers
again takes place. The measured short fiber percentage
in the bales should ideally show the same
short fiber percentage in the sliver as in the bales,
when subjected to gentle cleaning and carding, after
fiber parallelization by the drafting passages.
The short fiber percentage after noil extraction is 10
% with the ring spinning process and 15 % with the
carded rotor spinning process (Fig. 5).
23

24 LINK 59 . 1 /2012
TECHNOLOGY
Mean fiber length (n) [mm]
Fig. 6
Fig. 7
Number of imperfections
Fig. 8
MEAN FIBER LENGTH PER PROCESS STAGE AND YARN TYPE
100 % cotton 1 1/16", Almeter
2 2 . 0
2 1 . 5
2 1 . 0
2 0 . 5
2 0 . 0
1 9 . 5
1 9 . 0
1 8 . 5
1 8 . 0
1 7 . 5
1 7 . 0
1 6 . 5
1 6 . 0
0.11
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
250
225
200
175
150
125
100
75
50
25
0
bale after
B 12
blowroom ring
carded
35
14.87
60
card lap comber sliver autoleveler
draw frame
0,105
0,104
0,105 0,073 0,011 0,019
0,109
0,107
0,109
0,099 0,054
42
after
B 60
38
14.71
card
input
68
ring
combed
TRASH CONTENT PER PROCESS STAGE AND YARN TYPE
100 % cotton 1 1/16", ITV
Ring carded
Ring combed
Rotor carded
Rotor combed
24
card pre- lap comber autoleveler roving
drawframe
sliver drawframe
10
15.48
217
rotor
carded
YARN QUANITY DEPENDENT ON SPINNING PROCESS
100 % cotton 1 1/16", Ne 30, αm = 109, R 40 and G 33 (winded)
Rotor
carded
Rotor combed
13.9 % noil
63
Ring carded
Thin places -50 % Thick places +50 % Neps +280 %
2
21
rotor
combed
12.37
7
Ring combed
16.4 % noil
combed
carded
CVm
16
15.5
15
14.5
14
13.5
13
12.5
12
11.5
11
The short fiber percentage affects the mean fiber
length and consequently, alongside the fiber fineness,
also the spinning limit and yarn quality. The mean fiber
length is 19 mm in the case of the carded application
and 20 mm – 21 mm depending on combing
height in the case of the combed application (Fig. 6).
The residual trash content in the feed sliver on the
rotor spinning machine is an important criterion for
the operational safety of a rotor spinning machine.
Soiling of the rotor groove when the trash content is
too high creates thread breakage. Experience shows
that the residual trash content in the feed sliver for
the rotor spinning process with yarns from Ne 20 –
30 should not be higher than 0.07 – 0.1 %. These
requirements are fulfilled by the Shankar 6 cotton in
the case of a carded application. With the combing
process, the trash content is generally reduced by
60 – 85 % (Fig. 7).
The combing process can thereby be technologically
practical with a low combing level on the rotor spinning
machine. In general, the raw material properties
such as a high short fiber percentage, lower mean
staple and trash content in the cotton affect the rotor
spinning process far less negatively than the ring spinning
process.
Yarn results
Imperfections (IPI) and yarn unevenness.
The total number of imperfections with combed and
carded rotor yarn lie with α m = 109 (α e = 3.6) at the
same level. The number of imperfections in carded
ring yarn is significantly greater compared to rotor
yarn, despite reduced card production at 80 kg/h instead
of 100 kg/h.
The combing process – and thereby also the additional
elimination of short fibers – shows no advantages
in the rotor line in relation to yarn evenness.
This result is extraordinary as the short fiber content
in the ring spinning process clearly influences the
yarn evenness. That means that with the rotor spinning
process short fibres in the fiber guide channel
can be guided far better than is possible with ring
spinning in the drafting arrangement.

Number of particles/1 000 m
Fig 9
Fig. 10
TRASH PARTICLES IN THE YARN DEPENDENT ON PROCESS
100 % 1 1/16" Cotton, Yarn count Ne 30, αm = 109, R 40 and G 33 (winded)
Rotor carded Rotor combed
13.9 % comber noil
Ring carded Ring combed
16.4 % comber noil
If the short fiber percentage is reduced by combing,
a better yarn quality is achieved with ring spinning.
This is impressively conspicuous with combed cotton
yarn with an approx. 16 % level of noil extraction
and a yarn count of Ne 30. The measurements show
that by means of the combing process in comparison
to a ring yarn, a marked improvement in the yarn
evenness and purity can be recognized. The yarn
quality values then show better results than those of
a carded rotor yarn (Fig. 8).
100 % COTTON 1 1/16", NE 20, COMBER NOIL 13.9 %, R 40 AND G 33 (WINDED)
Rotor carded, αm = 109
Rotor combed, αm = 109
Ring combed, αm = 98
Ring carded, αm = 109
LINK 59 . 1 /2012
TECHNOLOGY
The residual trash content of a rotor yarn is far better
than with carded ring yarn, due to the trash extraction
on the opening roller in the case of a carded application.
Only the combing process and the related
elimination of trash particles make a very low residual
trash content possible also with ring yarn.
Yarn strength and elongation
The carded Ne 20 rotor yarn when compared to
combed rotor yarn at an identical twist factor has an
approx. 1 cN/tex lower yarn strength because of the
smaller mean staple length. The strength of the carded
Ne 30 ring yarn, however, is higher by 1 cN/tex
when compared to carded rotor yarn. It is common
knowledge that in direct comparison to rotor yarns
with an equal raw material structure, ring yarns exhibit
higher strength. This is linked to the fiber orientation
in the yarn bundle resp. the structure of the
core and wrapped fibers.
Yarn hairiness and abrasion
Processing of the yarns is made on a circular knitting
machine. Ring and rotor yarns differ clearly with regard
to hairiness. This difference is based on the varying
yarn structures of a ring and a rotor yarn. The
hairiness according to Uster Tester 4 is almost double
with a carded ring yarn as with a rotor yarn. The differences
between a carded and a combed rotor yarn
are minimal. The combing process does not affect the
25

26 LINK 59 . 1 /2012
TECHNOLOGY
Fig. 11
Rotor carded,
Single Jersey 100 %,
Cotton, 1 1/16",
Ne 30,
Navel KS-NX,
110 000 U/min,
αm 109.
Fig. 12
Rotor combed,
Single Jersey 100 %,
Cotton, 1 1/16",
Ne 30,
Navel KS-NX,
110 000 U/min,
αm 109.
Fig. 13
Ring carded,
Single Jersey 100 %,
Cotton,
1 1/16",
Ne 30,
12 200 U/min,
αm 109.
Fig. 14
Ring combed,
Single Jersey 100 %,
Cotton,
1 1/16",
Ne 30,
15 000 U/min,
αm 109.
hairiness values of a rotor yarn. Thus, with rotor yarn
the yarn hairiness is not primarily determined by the
fiber length for but rather by the yarn structure.
Clear advantages concerning yarn abrasion are obvious
with rotor yarns. Abrasion with a ring yarn is
higher by more than factor 5 compared to that of a
rotor yarn. It can be ascertained that the combing
process has a positive impact on the yarn abrasion
of a rotor yarn. The advantages of the rotor spinning
technology when processing Shankar 6 cotton with
a relatively high level of short fibers are impressive.
Micrographs show the typical rotor yarn structure
with wrapper fibers in comparison to the ring yarn
structure. The greater hairiness and the associated
volume increase of the ring yarn are clearly visible
on the micrographs. Normally, a rotor yarn is characterized
by a greater yarn diameter than a ring yarn,
at an equal yarn count. This results in higher opacity
in knits. However, as is shown by these results,
this effect can also be reversed by a shortening staple
length with ring yarn due to inferior yarn orientation
and bonding in the yarn strand (Fig. 10).
Knitted fabric properties
In this specific case, the following commonly practised
and typical criteria for assessment of the knits
were applied:
• Fabric touch
• Opacity
• Evenness
• Pilling
Touch, opacity and evenness
As to be expected, ring yarn is softer to the touch
than rotor yarn. The greater opacity of the carded
ring yarn compared to rotor yarn is in this case due
to the higher hairiness. This influence is also apparent
in the diminished opacity of combed ring yarn.
Carded ring yarn shows a clearly inferior fabric appearance
to that of rotor yarns.
Only the combing process can improve the appearance
in comparison to carded ring yarns to lie within
the same range as rotor yarn. The use of the combing
process with rotor yarn cannot achieve improvements
in the knits.
Pilling
Most of the physical properties of an end article are
the result of the structure of the processed yarn. The
pilling characteristics of the textile surface, especially
in knits, are one of the most important quality
criteria. End articles that form surface fiber pills
after only a short period of wear cause an extreme
devaluation of quality and are undesirable. Pilling is
therefore a constant theme and can be substantially
influenced and improved by lower hairiness and the
fiber bonding structure of the end spinning process.

The higher the grade, the better
6
5
4
3
2
1
0
Fig. 15
PILLING VS. TYPE OF YARN
Knitted fabric, Ne 20, acc. to Martindale, Yarn count Ne 20, Martindale
500 1 000 1 500 2 000 2 500 3 000 3 500 4 000 4 500 5 000 5 500 6 000 6 500 7 000 7 500
Rotor carded, αm = 109
Rotor combed, αm = 109
Cycles
Ring combed, αm = 98
Ring carded, αm = 109
With all the knits examined, the ring yarn showed
the worst pilling values. The carded rotor yarn
achieved the lowest pilling values resp. the best
marks (Figs. 11-14). The greater randomization of
fibers and the wrapper fibers produce resistance to
the formation of fiber pills. It can be clearly seen that
the combed rotor yarns show inferior values to those
of the carded rotor yarns. This fact can also be explained
by the reducing randomization of the fibers
due to the different staple compositions (Fig. 15).
Summary
By means of the combing process, the trash content
is reduced in a range from 60 – 85 %. With a low
combing level, the combing process can certainly
represent a technologically suitable solution for the
rotor spinning process. The additional short fiber
extraction shows no benefit in the question of yarn
evenness with rotor yarn.
That means with the rotor spinning process, short
fibers can be far better guided through the fiber
guide channel than is possible with ring spinning by
means of the drafting arrangement. In contrast, with
the production of ring yarn the combing process is
indispensible to improve quality when a higher short
fiber percentage, a lower mean staple or a higher
trash content exist in the cotton.
LINK 59 . 1 /2012
TECHNOLOGY
Such prerequisites have a far less negative effect on
the rotor spinning process than on the ring spinning
process. According to the raw material constellation
and the type of downstream processing, the rotor
spinning process can be considered as more economical.
The evenness of the rotor yarns is superior
to that of ring yarn in the case of processing carded
Shankar 6 cotton at a yarn count of Ne 20.
By means of the combing process, the ring yarn quality
can be considerably improved and is only then superior
to the carded rotor yarn in the case examined,
with the exception of the hairiness and abrasion resistance
and the pilling values.
The greater hairiness and the associated volume increase
in the ring yarn resulted in a better opacity in
the knitted fabric. Normally, a rotor yarn is characterized
by a greater yarn diameter at equal yarn fineness
than with a ring yarn. This results in a higher
opacity in the knitted fabric. This effect can be reversed
by a shortening staple length due to the inferior
fiber orientation and bonding in the yarn strand.
Ring yarn has a softer touch compared to rotor yarn.
By means of the combing process with rotor yarn, no
improvement in the knitted fabric can be achieved.
The reduction of the twist coefficient with combed
rotor yarn also does not lead to any improvement,
neither in the touch nor in the other assessment
criteria. With all the knits examined, the ring yarn
exhibited the worst pilling values. The rotor yarn
achieved the best pilling values. 12-111 •
Harald Schwippl
Head Technology
Winterthur
harald.schwippl@rieter.com
27

28 LINK 59 . 1 /2012
PARTS
Precise Spindle Monitoring
with ISM
Automation of production, especially in the spinning process, is becoming
increasingly important. Rapid intervention where a problem arises, high
machine productivity and the resulting minimizing of follow-up costs are
factors that mean a decisive competitive edge for yarn producers.
1
2
Rieter offers a system which can significantly influence
just these factors.
Optimizing Production and Quality
Individual Spindle Monitoring System (ISM) is based
on the optical scanning of the ring traveler. If the
traveler is no longer rotating on the ring, the control
detects an end down and signalizes this by the
three-stage light guide system. Continuous monitoring
also permits slipper spindles to be precisely
identified and indicated.
The machine operator is therefore in the position to
locate the fault and to very quickly rectify it on the
spot. (Fig. 1)
Fault Finding instead of Fault Searching
The precise operator guide allows personnel to optimize
their procedures and thereby results in clear
time saving. Unnecessary inspection tours are no
longer made. Direct access to the right spinning position
also brings a reduction in avoidable fiber waste.
(Fig. 2)
Uninterrupted Documentation of Spinning Positions
All ISM data is stored and can be used for numerous
types of analysis. Connection to the Rieter data collection
system SPIDERweb is unproblematic.
Also available as Retrofit
Rieter Parts offers this system as an economical retrofit
on new as well as on older machine generations.
Efficiency will be demonstrably increased and the
constancy of the yarn quality improved. 12-112 •
Urs Tschanz
Head Sales Support Parts SYS
Winterthur
urs.tschanz@rieter.com

Innovative Retrofits for
Draw Frames
Many progressive enhancements of the draw frame can be integrated in
older machine models with little effort. The non-contact pulse generator
B92 EVO facilitates improved measuring accuracy – even with heavy
soiling. Thanks to the innovative XR nanocoating the life cycles of the
calander disc in the sliver canal are extended. The accuracy of the sliver
thickness measurement is thereby improved.
Fig. 1 The new pulse
generator B92 EVO
consisting of sensor
and magnet ring.
Fig. 2 Long lasting
calander discs with
XR coating.
The pulse generator B92 EVO is available for the
draw frame types RSB-D 30, RSB-D 30c, RSB-D 35,
RSB-D 35c, RSB-D 40 and RSB-D 40c.
Non-Contact Pulse Generator B92 EVO
The magnetic measuring principle of the pulse generator
B92 EVO is based on a magnet ring and sensor
head. With older draw frame models, an additional
shaft is delivered to facilitate this non-contact measuring
principle.
The high shock/vibration resistance and dustproof
properties (Protection Class IP67) of the pulse generator
B92 EVO allow a faultless application even under
extremely dusty environmental conditions with
fiber fly. The vibration resistance also ensures a high
level of measuring accuracy and functional safety.
A longer life cycle compared to its predecessor
is achieved by the new pulse generator B92 EVO
through contact-free measuring. Bearings that could
wear out no longer exist.
During the development, great value was placed on
simple installation and high ease of maintenance.
The main drive shaft only needs to be installed and
dismantled when assembling the magnet ring; in
contrast to the exchange of the old pulse generator
B92, where the shaft had to be completely dismantled
every time.
The sensor B92 EVO is attached to a separate holder
which allows it to be changed without removal of the
main drive shaft. With its lower installation height
Jörg Feigl
Project Manager Parts
Ingolstadt
joerg.feigl@rieter.com
LINK 59 . 1 /2012
PARTS
and the integrated plug, it is very easy to install the
new pulse generator B92 EVO and to connect it to the
existing socket. This results in a quick recommissioning
of the draw frame following a successful retrofit.
Long-lasting Calander Disc XR with Nanocoating
The calander disc XR can be supplied for all Rieter
autoleveler draw frames – from the RSB 951 machine
generation.
The calander discs are necessary for transporting
the sliver in the sliver canal of the draw frame and
are thus subjected to persistent stress resp. a higher
level of wear. The calander discs are responsible
for part of the quality monitoring of the sliver and
for this reason, their surface quality is extremely important.
The XR coating was developed precisely for this
application. It exhibits an extraordinary wear resistance
which stems from its very high degree of
hardness and the nano-structured layer construction.
Due to the special XR process, the roughness of the
surface is exactly the same as with an uncoated calander
disc. This very smooth, fiber-gentle surface
characteristic is retained by the homogeneous layer
structure over the entire life cycle. This assures consistent
measurement and quality of the sliver over a
significantly longer period of time. 12-113 •
29

30 LINK 59 . 1 /2012
RIETER INSIDE
The Comfort of Competence –
the video clip
Advertising spots tell us entire stories every day – in the space of a few
seconds. Rieter’s total offering, the advantages enjoyed by customers
with Rieter as their systems supplier – these are explained in the
“The Comfort of Competence” campaign. A brief, unconventional advertising
spot illustrates the new campaign in an exciting way.
Fig. 1 Behind the
scenes: video recording
of the textile trial.
Fig. 2 The camera
focuses on the Rieter
sales engineer.
Fig. 3 Perfect lighting
of the scene for the
video clip.
“The Comfort of Competence” is the customer benefit
provided by Rieter Spun Yarn Systems. Rieter is
a strong, competent partner, dedicated to making
customers’ lives easier by offering care and support
from the initial investment discussions to the successful
operation of a spinning mill.
1 2
3
The new advertising spot illustrates just this message
and puts the focus on the comfortable armchair,
which serves as a metaphor for Rieter’s machines
and services.
The history of a project with Rieter
The spot shows a project undertaken with Rieter in
simplified form. It starts with discussions between
a customer and a Rieter salesman, who provides the
customer with expert advice on all 4 spinning processes.
The signed project is then laid out in 3D on
the computer and adapted to the customer’s wishes.
Rieter then conducts various textile trials with
the customer’s raw material in order to establish the
precise spinning parameters. The machines supplied
are installed quickly and reliably in a coordinated
team effort by Rieter fitters. Before the installation
is handed over to the customer, quality tests are performed
– and certified after successful completion.
Rieter celebrates the climax of these operations – the
handover of the installation – together with the customer.
The satisfied customer raises his glass with
Rieter employees in a toast to the successful completion
of the project.
Now watch it!
Visitors to our exhibition stand at the ITMA in Barcelona
were already able to watch the new advertising
spot or were shown it on an iPad by a Rieter sales
engineer.
The advertising spot is now accessible for viewing
on the Rieter website. Use this printed QR code to
view it in comfort on your mobile
phone. 12-114 •
Michel Gelin
Senior Marketing Manager
Winterthur
michel.gelin@rieter.com
http://bit.ly/IC1dEN

Presentation of the Rieter Award
in Vietnam
In 2011, the coveted Rieter Award was once again presented to a student
from Vietnam. Winner of the Rieter Award was Ms. Le Nguyen Bao
Quyen from the Technical University in Ho Chi Minh City. In her student
research project, Ms. Le selected a very interesting branch in the diversified
field of textile applications by examining non-woven fabrics.
The Rieter Award winners 2011 on their visit to the Rieter headquarters in Winterthur
(Switzerland). Front row, from the left: Qin Wang (China), Le Nguyen Bao Quyen (Vietnam),
Nazan Erdumli (Turkey). Back row, from the left: Pavel Murychau (Belarus), Kashif Nadeem
(Pakistan), Avinash Kesaraju (India). Mr. Md Almirany from Bangladesh is missing on the
photo. To our regret, he was not issued with a visa and could therefore not participate in the
Rieter Award week.
LINK 59 . 1 /2012
RIETER INSIDE
Left to right: Rolf Zimmermann, Rieter Sales Engineer Asia/Orient,
Thomas Kuettel, Rieter Head Sales Area Asia Pacific & Orient,
Le Nguyen Bao Quyen from Vietnam, winner of the Rieter Award
2011, Reto Thom, Head Sales.
The Rieter Award consists of two components: an individual
distinction in the winner’s home country and
a trip to Rieter in Switzerland. The prize trophy and
the accompanying certificate were handed over to
Ms. Le during the Rieter symposium in Ho Chi Minh
City in Vietnam. The event, which took place on 25.
October 2011, was attended by more than 100 representatives
of 36 customers from the southern regions
of Vietnam. The ceremonial prizegiving met with a
great reception by all the guests, with particular tribute
also being paid to Rieter’s support and promotion
of young textile science students.
On the occasion of the Rieter Award week in September
2011, Ms. Le travelled together with all other
prizewinners from around the globe to spend seven
days in Switzerland including a trip Barcelona to visit
the ITMA 2011.
This gave Award winners the chance to get to know
Rieter as a company and its employees and they had
the unique opportunity to study the latest innovations
of the textile machine industry at close quarters. –
A summit meeting for the “textile future”. 12-115 •
Rolf Zimmermann
Regional Sales Manager Asia / Orient
Winterthur
rolf.zimmermann@rieter.com
31

www.rieter.com
Rieter Machine Works Ltd.
Klosterstrasse 20
CH-8406 Winterthur
T +41 52 208 7171
F +41 52 208 8320
sales.sys@rieter.com
parts.sys@rieter.com
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Koregaon Bhima
Taluka Shirur, District Pune
IN-Maharashtra 412207
T +91 2137 253 071
F +91 2137 253 075
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No. 83 Loushanguan Road
CN-Shanghai 200336
T +86 21 6236 8013
F +86 21 6236 8012