Plate Quality Measurement Plus - Nela

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PQM - Plate Quality Measurement
The Demand
Inline surveillance of the
image quality of CtP
printing plates
Suitable for newspaper
printing
Preview Image
Result window with
coverage, screen width
and screen angle
The Solution PQM
Exposing a tonal value
patch on the non-printing
area of the printing
plate and recording of the
tonal values with a digital
camera.
Calculation of the tonal
value by means of an
image processing software
and comparison
with the pre-set value.
Printing plate settings Measuring Bar for coverage
If the pre-defined tolerance
values are exceeded, the operator
will be notified automatically.
Arrangement of measuring
surface outside of text area
Result Image
Measuring data
- screen percentage
- reference value
- tolerance value
- screen ruling (in l/cm
and l/inch)
- screen angle
- preview image respectively
measuring
image (TIFF)
- result image (TIFF)

Product Features
Measurement of screen
percentages
Comparison with a reference
value
Display and storage of
the measured data.
Activation of a warning
light if out of tolerance is
detected
Applicable for all screen
types and printing plate
types
Upgradeable to PQM+
data axis of screen
percentage
Technical Information
Measuring
method
Measuring values
Positioning
Measurable area
Active
measuring area
Operating system
Scope of delivery
history of measured
values of last 200 plates
}
Digital USB2.0 camera with microscope
optics
coverage,
Screen value
Sreen ruling in l/cm and l/inch
Screen angle
Measurable area on a fixed position
on the printing plate in the non-printing
area
5 x 5 mm a screen percentage between
20% und 80%
approx. 0,7 x 1 mm
Windows 2000/XP
1 x USB2.0 camera with microscope
optics
Mechanical components
Automatic plate positioning
Diode ring-light
PQM image-analysis software with
dongle (hardware key)
permitted parameter range
recording of data
for a set period
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PQM+ - Plate Quality Measurement Plus
The Demand
Automatic Multi-Field surveillance
of the image
quality and plate development
quality
Early identification and
analysis of image variation
normally leading to
reduced printing quality.
All relevant measuring
data will be saved and
statistically interpreted
for quality documentation
For newspaper and commercial
printing
The Solution PQM+ *
Exposing of a multiple
field wedge onto the
non-print area of the
printing plate.
Recording of
the 2 x 18 mea-
suring areas via two highresolution
digital cameras
with microscope optics.
6 mm
4 mm
Definition of the standardized
tonal value
transmission and analysis
of micro elements.
Measuring data
- CtP - curve
- Laser energy
- Focus
- Fogging
- Development
* Patent pending

Product Features
Deviations in the CtP
process which can lead
to reduction in quality
can be detected early
Identification of the
cause of an error
Visual and audible notification
in case of an
error, or sending of an
e-mail/SMS message
Storage of all relevant
measured data for quality
documentation.
Remote Support available
with access to all
measured images and
measured values.
Feedback Signal
Laser energy
CtP
curve
Focus
Fogging
Processing
Methods of Analysis
Calculation of screen percentage values
Calculation of tonal values
Analysis of background
clarity
Analysis of margins
of pixel elements
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PQM+ - Plate Quality Measurement Plus
Technical Information
Measuring method
Measuring values
Position of PQM+
wedge
Measuring Area
Printing plates
Operating system
Scope of supply
2 digital USB2.0 camera with
microscope optics
CtP curve
Laser energy
Laser focus
Fogging
Processing
PQM+ wedge must be imaged at
two pre-defined locations diagonally
across the printing plate,
inside the non-printing area.
6 x 4 mm Wedge *
Digitally and conventionally
exposed printing plates with AM
and FM- screen; positive and
negative plates
Windows 2000/XP
2 x USB2.0 digital camera
2 x mechanical components in
the machine
2 x ring light
PQM+ Image
analysis software with dongle
(hardware key)
* Patent pending
Area 1: raster 98%
Area 2: raster 90%
Area 3: raster 70%
Area 4: raster 50%
Area 5: raster 2%
Area 6: raster 10%
Area 7: checkerboard
pattern 1 x 1 pixel
Area 8: raster 30%
Area 9: lines 5 x 1 pixel
Area 10: lines 5 x 1 pixel
Area 11: lines diagonally
2 pixel
Area 12: checkerboard
pattern 4 x 4 pixel
Area 13 - 18: Surface areas
for fogging- and
background
analysis

Measuring
Procedure
Decision criteria for PQM+
Surveillance of all qualityrelevant
criteria in the
quality circle
RIP-settings
Exposure unit
Printing plate
Plate processor
Advantages of PQM+
Workflow - System
SMS
E-Mail
NELA Status-Center
Quality monitoring of
daily production
Fast and reliable infor-
mation
Proven quality
Production cycle
Measuring results as quality
check after installation
Reduced testing during
imaging
Optimizing potentials with
PQM+
Standardization of all
workflow parameters
Designation of optimized
exposure characteristics
Detection of deviation to
standard defined by
UGRA/FORGA
Detection of process fluctuation
• Image analysis
Calculation of
measured data
• Display and export
of measured data
• Evaluation
image recording
with camera
Identification of optimal
settings
Results by using PQM+
Stable, standardized quality
according to IFRA standard
Reduced operator intervention
after installation
Cost reduction
Documented quality of
plate production
This means for you
Professionalism
Competency
Safety
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PQM+
PQM+Features
Early warning system for quality monitoring
100% quality documentation
Suitable for newspaper and commercial applications
Precise measuring of absolute values
Pixel evaluation with margins and background analysis
Suitable for all printing plates and raster types
Newly developed high-resolution digital camera system with microscope optics
Plate types and CtP systems can be monitored by comparison with individually
pre-defined values and tolerances
Special 2 x 18-field wedge suitable for all printing plates and CTP technologies
Measuring across the diagonal of the printing plate
Purpose-designed image analysis software for multiple field wedge
Tolerance monitoring of the tonal value curve
Trend and tendency display in a histogram
Hardcopy to network printer
Integrated expert system
Multi-Client capable
NELA USA
7435 4th Street N
Oakdale, MN 55128
Phone +1-651-407-4800
Fax +1-651-407-4801
www.nela-usa.com
sales@nela-usa.com
BRÜDER NEUMEISTER GMBH
Gottlieb-Daimler-Straße 15
D-77933 Lahr
Telefon (07821) 5808-0
Telefax (07821) 580862
www.nela.de
e-mail:sales@nela.de