A/C/C - Compumachine

A/C/C @(~JU'n®© Precision Column Type Surface Grinding Machines
The ACC Series is available
with three control options to meet specific grinding
applications. Choose from Automatic, MOl Control (Manual Data Input) or full 2-axis
simultaneous CNC in a wide range of capacities. In all, there are 45 models.
Whether the application is small lot, high-precision parts, or rigorous high-volume
production, these rugged machines provide true precision, long-term reliability and
broad application
flexibility.
ACC Column OX Series
• This fully automatic grinder uses
the DX Control that has a 35 year
record of proven performance.
Precise AC servo driven downfeed
with 0.00005" minimum increments
is displayed on the built-in digital
display.
ACC Column EX Series
• When grinding conditions change
and fast turn-over is important, the
EX Series delivers. This model has
fully controllable vertical and crossfeed
through precise AC servo
drives. An overhead wheel dresser
provides automatic wheel
dress/dress compensation. A table
mount type wheel dresser is also
available.
ACC Column DXNC Series
• Precise, productive, easy to learn ­
that's the DXNC Series. This
model features built-in grinding
cycles with powerful conversational
software. Single surface, multisurface
(step, step with convex
shape, step with concave shape
and templates) for wheel forming
are standard. The standard 2-point
table mounted wheel dresser
affords increased tolerances by
establishing dresser point as
datum. When the application calls
for form grinding (G-code) and
contour grinding (G-code) choose
the optional 7-step swing type or
rotary type wheel dressers.
2
Machines may be pictured with options.

Choose the model that's right for the job
rface
ning le
for
Grinding Patterns
WORKPIECE SHAPE
PLUNGEE
Workpiece surface smaller than grinding
wheel surface
Step Infeed, Step StepTraverse, Infeed Infeed Crisscross
SERIES / NC Cycle (CNC OXNC Conversation (Full
(PLC EX MDllnput
SERIES
Auto. Type)
SERIES
PositioningNC Type) Software Conversation Manual
Cycle Positioning Software 999 26 I
Manual Operation Step NC Conversation Cycle Infeed, Traverse, Software Input (Max. 8 Step)
Crisscross, Shift Plunge
Shift Continuous
Plunge Cut Infeed
Grinding Method
~ntinuous
Feed
PLUNGE REGULAR PITCH
U
.-ur-u•
I~
Vertical plunge depths and cross feed
positions are the same
PLUNGE IRREGULAR PITCH
V depths Verticaland plunge cross
, I-SS11111 'Ht not feedthe positions same are
r-~
SURFACE
' ,
", ,
U
, ,-
Workpiece surface is bigger than
grinding wheel surface
MUlTI-SURFACE
'JiJ
'
'i1J
'
I I I I I I I I
I I I I I
:m' :: :++1:: : +-ij'
:~ 'n' ini 'n'
Vertical plunge depths and cross feed
positions are not the same
Grinding Cycles
STEPINFEEO CONTINUOUS FEED TRAVERSE CRISSCROSS SHIFT PLUNGE (Coarse Grinding)
Single Side Both Sides
Step Width
~
Wheel In feed by both ends
of cross stroke.
Applicable for coarse grinding
EX & DXNC Series machines.
on
3

Superior design and construction
for the heaviest grinding applications
Okamoto Column Types design assures superior Rigidity, Accuracy and Reliability ­
Work Envelope Access for simplified
large work set-up and in-process inspection
Why Column Type Design is Better
The grinding wheel is part of the column assembly, both
move simultaneously. The table travels longitudinally on
the machine bed. Crossfeed is executed by column travel
so chuck/workpiece to operator distance remains
constant. The result is optimum operator convenience,
safety and operation.
Column assembly and table frame
Outstanding infeed accuracy with high rigidity design
GRINDING
SPINDLE
Over 60 years of grinding machine experience go into
every grinder. Robust cast iron has the thickness and
strategically located ribbing to ensure maximum long-term
rigidity. The wheel head is fully supported by 6 slideways.
The column assembly incorporates a unique ventilation
port to evacuate hot air from the column interior resulting
in enhanced thermal stability.
Okamoto Column Type Surface Grinders are renowned
for their large and heavy workpiece capacities.
At no point during table reciprocation does the chuck
work zone overhang the machine frame. This eliminates
deflection due to weight stresses and assures consistent
accuracy throughout the full grinding stroke.
The combination of a V-F slideway and hydraulic cylinder
provides for stable table movement and speed even with
heavy workpieces or slow table speeds.
4

Precise heavy grinding conditions demand an
exceptional spindle .
.!
OPTION
STANDARD
The cartridge type ACC Column
3'
wheel spindle is designed to
H
deliver peak accuracy even under
the heaviest grinding demands.
A specially designed, precision
010.25'
balanced spindle motor drives
the spindle through a flexible
coupling that absorbs vibration
while transmitting full horsepower.
An impeller mounted on the motor
shaft expels heat away from the spindle out the column
vents. Bearings are sealed and lubed for life.
Reliable Hydraulic / Lubrication System Optimum Thermal Stability means Optimum Accuracy.
Consistent, dependable lubrication is
the lifeblood of any machine. ACC
Column Grinders utilize a reliable
gravity feed system that provides
critical lubrication to all slideways and
positioning screws.
i
HEAT EXCHANGE
UNIT
AUTO.TEMP.
CONTROL
UNIT
(Option)
OX Series
EX Series
OXNC
Series
The hydraulic units / temperature regulating systems are designed to be
positioned away from the grinding machine. This eliminates the transmission of
accuracy robbing heat and vibration to the machine.
SADDLE
BED SlIOEWAY
HYDURN~¥L1C
AUTD.TEMP.
I I COll~rTOl
(EX: Dplion)
ACC-DX Series: Temperature regulator standard
ACC-EX Series:
Fan type radiator standard
ACC-DXNC Series: Temperature regulator standard. Spindle housing
temperature controlled by hydraulic oil. If desired, a heat
exchange unit can be connected to grinder's coolant tank.
5

ACC-DX Series
• -'::¥
.;§\~~ -. '-'-
.•-~_.-
Okamoto O·
•
ACC-DX Models deliver rugged performance,
superb precision and long-term
dependability at an affordable price. They utilize Okamoto's exclusive MDI control
system that assures consistent precise infeed. Minimum increment is 0.000050".
Total stroke is also displayed. This easy-to-use control simplifies touch down and
minimizes
air cut time.
Optimum Convenience
The DX Series lets today's
progressive machinists enjoy the
convenience, flexibility and safety of
Okamoto column type design. The
traveling column assures
unobstructed access to the work
envelope even with extra-large
workpieces. Parts loading/unloading
and in-process inspection is also
simplified. All handwheels, switches
and control buttons are conveniently
located on the front control panel. An
interlock system during the auto
cycle and protective covers for table
dogs and other machine components
promotes operator safety.
High Precision
The best components make for the
best machine. The combination of a
high resolution AC servo motor and
tinE:lpitch ballscrew delivers
outstanding infeeds of 0.00005".
Okamoto's LSI Control System
allows operators to select infeeds
from 0.00005" to 0.002" through
simple switch operation.
Simple Operation
Okamoto's E>X eentrol sy§!@m
simplifies the grinders fully automatic
cycle. Coarse grinding, Fine
Grinding, Spark-out and Table Stop
at Right are displayed on the
machine's digital display. Vertical
wheelhead position is also always
displayed.
6

7
Operation Panel
-'-.~
on

ACC-EX MOl Series
ACC-EX Models provide all the performance, precision and dependability of the
OX Series plus a new degree in convenience. Their easy-to-use Manual Data Input
(MOl) control system simplifies
set-up, change-over and boosts productivity.
EX Series Column Grinders use
Okamoto's "user-friendly" grinding
software. This proven software
simplifies all phases of the grinding
operation while giving the operator
the "feel" of conventional machine
operation. This simple "teach
function" simplifies vertical sizing
position, crossfeed point and
dressing position. Vertical and
Cross movement, Automatic
Downfeed (Traverse or Plunge) are
programmable in 17 increments
0.0" to 0.005". The minimum
from
Crossfeed increment is 0.00005".
All EX models are equipped with Overhead
Wheel Dressers as standard.
Grinding Condition Set-up Screen
DRS DATA LIST
R-~j)RS INTVL AMT
H·DRS INFEED AMT
ME D NO. 01' DRS
R-DRS SPD
F IJI{S INTVL AMl
F-DRS INEEED AMT
I~ -OHS SPD
NO. OF DEAD PASS
DRS POS SET
WHL WIDTH
DRS INFLLD SEL. 02
NQ OF ROTARY-DRS
UM-
JOG **** *** ***
pas )(GRIND)(
1.
0.
1
5~0.
0.
0.
2.00.
1
2.
50.
o
o
11,10:3"1
)( t
0000
0200
~000
3000
0100
0000
2323
0000
)( DONE
Dressing Data Set-up Screen
.-
~
8

Operation Panel -
Easy operation with Conventional
feeling
Various Automatic Grinding Cycles
• Work / Chuck Datum Position
This data page displays the exact
position of the workpiece in
relation to the grinding wheel.
Choose either Work Datum or
Chuck Datum for workpiece sizing
references.
• Shift Plunge Grinding Mode
Shift plunge cycle allows for coarse
grinding to be conducted in a
plunge mode and the fine grinding
to be done in a continuous grinding
mode. This cycle saves 20 - 40%
over conventional cycles with the
same resulting surface finish.
• Simple Dress Invalid Cycle
With a simple flip of the dressing
switch the machine will ignore all
dressing data and no dressing during
cycle takes place. When used with
the Work Datum the EX can work
like a conventional grinding machine.
This is highly effective for simple
one-off grinding jobs.
feed
d
Automatic Grinding Cycle
Traverse Grinding I
lOatum
Coarse Mode Grinding
Fine Grinding
Shift-Plunge I Step-One Plunge-Both
Plunge-One Plunge-Both
Step-Both
Crisscross
Sides SidesInfeed
(Bias) Grinding
Sides Step-Both InfeedSides Infeed Infeed
Step-One Side Infeed
Crisscross
Step-OM Side (Bias) Infeed Infeed
Fully Automatic Grinding Cycle
Automatic Grinding Cycles, Traverse, Plunge, Shift Plunge,
Dress & Dress Compensation Cycles, Automatic Grinding
Wheel Retract. An over-the-wheel head type dresser is
standard and can be set for both coarse and fine dress
amounts, speeds and intervals independently.
Table Mount type dresser is optional, and the dressing cycle
between table dresser and over-the-head dresser is
synchronized to automatically compensate and transfer
wheel diameter to each unit for size compensation.
Teaching Function
for Easy Set up
Grinding wheel cross positions, grinding wheel sizing
position and dress position can all be set with a simple
push of the teaching button.
Cycle Chart (Example: Work Datum, Shift Plunge + Traverse)
--~ /
Initial Dress (Rough Dress) Dress Compensation Backlash Compensation
" "",h Gri'''', Me",Ie I Dress(Rough Dress) I A
'-'1_ / Comllensatlon .. / /
Datum Point \ " ~Dress / \.. _ /- _
L-- L.r "",h G,m'm, FloeDressi', / /
Dress L / Dress Compensation I" id ~elraclion
Interval Amounl _ L I
TOlalltock I • If "- FioeDress'" // /
L, I all I
"ou,h Gri'''',
0
~ . S,arkDut /
Rem val StockRemova or n,. / / /
O~ _____ n
~ / /
--,. ~~ I
Sizing Point ' .• Manuallnlerrupllon
Dress on Demand
in Cycle
The same as conventional machine, Dress compensation is
standard, and a convenient dress interrupt feature also
allows for "Dress on Demand".
The following can be changed during cycle:
Coarse Grinding Amount, Fine Grinding Amount, Spark-Out Time,
Fine Dress Number, Retract YES/NO, Crossfeed Step Amount,
Switch to Bias Feed, Step Amount or Bias Speed, Plunge-One
Side, Plunge Both Side Switchover, Crossfeed reversing Position
Fine Grinding Step Feed or Bias Feed (Zigzag Feed)
I It I
_ -1_ J
"Ou1TtghGrir~in~(s:(~:ungec~t)0
9

ACC-DXNC
Series
r
Various Dressing Units
Wheel
Forming Tracks
The Single Point Dresser Unit (located
table left side) uses Column Crossfeed
and Grinding Wheel vertical movement
to generate flat dress or multi-flat
grinding.
Table Mount Single Point Dresser Unit
The 3-Point Dresser unit (located table
left side) has a top and 2 side-mounted
diamonds needed to prepare Angle
Dress, Side Dress or Radius Wheel Forms .
Table Mount 3-Point Dresser Unit.
• For Angle Dress (45 deg. divide)
For use wheel 00 dress, Angle
Dress (V-shape) form
• For Side Dress (90 deg. divide).
For use wheel 00 dress, single
side dress, both side dress form.
Table Mount Hydraulic Type 7 Step
1 0 Swing Dresser
z
Y18.....zY10 -:U
- -&-~-
~~
The Swing- Type Dresser Unit (located
table right side). Dresser arm can be
tilted +/- 30 deg., +/- 15 deg. and 0 deg.
(total 7-step) to avoid interference
between diamond tool and shoulder, and
make universal wheel forms with 2-axes
simultaneous control for Cross and
Vertical Infeed.

••• ", *"''''
Easy operation with Operator Friendly Software
Minimum increment 0.00001" for [Grinding wheel Vertical & Crossfeed feed]
High Efficiency for Setting up time with 78/PM for Vertical movement, 196 IPM for Cross movement.
•• "
High level of consistency to assure high
accuracy tolerances
• Vertical Feed Slideway for Low Friction
• Crossfeed Slideway (V-V)
• Hydraulic Type Counter Balance
Cylinder
• Oil Cool Type Spindle Housing for
Thermal Control
, ,
I ,-I I
< ~T (;~O SID! fRf '1£lIL,
User Friendly Conversational ,UJ Software
r-~'-
U "

12
Vertical Spindle Attachment (3hp)
with Dressing Device
Standard and Optional Accessories
to meet any demand
76
Standard Accessories
INo Grinding Items EX -
Automatic Hand Held Mount Adapter OXNC Wheel Type Dress Vertical Type I Over-the-Wheel Compensation Diamond & Cross Dresser Dresser TypeTool Wheel 20 Spindle HP Splash Wheel Guard Cover Inverter Temperature + Spindle Magnet Coolant Motor Stand Controller Nozzle Base& Pipe Table Fan Cooler -
Signal Lifting 00 0
Controller Option Okamoto Tower 0
Fanuc
Oil System for Cool (3-Color Hydraulic ByType) Spindle Hydraulic Oil Housing System OX
-
Graphic G-Code MOl Hydraulic Leveling Necessary System
00 Program Type Bolts Cylinder Tools Conversational with& Capability Type Tool PlatesBox Software
0Option
Okamoto
Weight Balance System
OpUonalAccessories
Coolant System with Magnetic Dust Separator
Coolant System with Magnetic Dust Separator and Paper Filter System
Coolant Temperature Regulator
Electro Magnetic Chuck
Chuck Controller for Normal Electro-Magnetic Chuck
Electro-Permanent Magnetic Chuck
Chuck Controller for Electro-Permanent Magnetic Chuck
Oil Cooling Type Electro Magnetic Chuck
Oil Cooling Type Spindle Housing
Grinding Wheel Balancing Stand with Arbor
Balancing Test Arbor
Grinding Wheel Adapter
Grinding Wheel Adapter for Micro Balancer
Grinding Wheel Adapter for Dynamic Balancer
Micron Balancer System
Hydraulic all Temperature Regulator
Grinding Wheel Spindle Motor 30 HP
Vertical Spindle Attachment (3 HP) with Dressing Device
Grinding Wheel Adapter for Vertical Spindle Unit
Frequency Inverter for Wheel Spindle
Signal Light (3-Color Type)
Calendar Timer
Table Enclosure
Coolant System with Magnetic Dust
Separator and Filter
Grinding Wheel Balancing Stand
with Arbor
Electro-magnetic
Chuck
Dynamic Wheel Balancing System
Indexing System Overhead Wheel Dresser Micro Balancing System

13
Floor Plans I Weights
Ic
1
ACC OX SERIES (Dimensions in Inches)
1216185
1263
1357213 1263
1346
263
213
15.75 19.09 125 16.93 100 13.1915.16 11.0212.99 9.8411.81 17.13 14.96 13.78 119 106
3346 7.87 86 94 11.81 374
20·48 120·60 32052 120·80 132060 24·48 28·60 120·120 I 124060 32080 128·80 132·120 124080 128·120 124·120
WEIGHT
(in Lbs)
116,540 117,640 119,845 1 26,460 117,200 118,520 I 20,730 127,340 123.370 126,020 134,180 123,920 124,100 126,900 135,200
ACC EX SERIES (Dimensions in Inches)
1263 1216 120·60
1263 I 1346 I 185 1357
213 216 28·60 20·8020·48
213
I24·48 128·80 20·120 124·120 32052 124·60 128·120
19.09 16.93 13.1915.16 1102 9.8411.81 138 17.13 14.96 156 13.78
132060
12.99 143
1 24·80 132080 132·120
15.75 162 33.07 7.87 86 94 11.81 3740
WEIGHT
(in Lbs)
116,100 117,200 119,400 I 26,020 116,760 118,100 1 20,300 126,900 122,930 125,580 133,730 123,590 123,810 126,460 134,850
ACC OXNC SERIES (Dimensions in Inches)
1I 231229
2632331
1 I 211
358 358 20·48
229
1 20·60
19.09 132 15.74 16.92 13.1915.15 11.0213.58 9.8411.81 110 14.96 13.77 17.12 126
1 20·80
116
32.67
28·60 24·48 1 20·120 I124·60 28·80
7.87 125 134 11.81
1 24·80 28·1201 I 32052 24·120
36.61
1 32·60 132080 1 32·120
WEIGHT (in Lbs)
1 16,540 117,640 1 19,8451 26,450 117,200118,520 1 20,730 I 27,340 1 23,370 I 26,020 1 34,180 1 23,600 1 24,030 126,660 I 35,280

1.:1
Specifications
MODEL
CAPACITY
Unit I ACC-20'48 I ACC-20'60 ACC-20'80 I ACC-20'120
ACC-24'48 ACC-24'60 ACC-24'80
Grinding 22 20x47x4.320 1,940 Capacity x 48 57(980)
26 4,960 4,290 24 5,260 5,220 5,510 (W x 69
59 xL) 89 80 79 128 120 118 69 60 59 48 47 57 (1,230) (2,450) (1,330) (1,640) (1,170)
x 4.3in. x Ibs
27.3 23.5
(Incl.
(W xL) x LChuck)
x H)
GRINDING WHEEL
Dimensions (D x W x B) in.
20 x 3 x 8 (20 x 3 x 5 optional)
Speed
rpm
MOTORS
Grinding5
Wheel I Spindle
I
I 5
hp KVA 1.2 for ACC-EX Models
7.5
1.07 N/A 20 for ACC-DX Models
230/460V
MODEL ACC-DX 0.0004 0.20. 0.0001 0.00005 0.001 N/A 16 1.2- -1.4 16 82 (x1) Models
- 0.00295 / 0.04 0.001 (Coarse: (x10) ft./min.
in./min.
Unit
15 Steps 0-5 / Fine: 10 01 0.0001 0.004 0-5 61.2
0.001 0.00001 N/A 0.00005 ACC-EX Steps) - (x1) 3.3 82Programmed -(xO.1) (x1) / 1.5 Models
-(xO.1) 0.05 0.0025 N/A /0.0005 / (x5) 0.010 / 0.0001 (Coarse: / Through 0.2 (x1) (x5)(x20)
(x1) /0.100 / 150.002 Conversational /0.001 Steps (x10) (x20)
/ Fine: (x10)
10Softwa
Steps)
Manuallnfeed
Hydraulic Handfeed Intermittent Coarse Grinding per Feedrate Hydraulic Revolution
(Average) Feed

15
~ I ACC-2a·60 I ACC-2a·aO I ACC-2a·120 j ACC-32·52
ACC-32·60
j ACC-32·aO IACC-32·120
24 x 120 34 32 30 28 34 32 x x 128 120
61 52
80 89
69 60
27.3
~
4,820 24 x 118 (2,660) 6,170 32 5,840 5,400 5,640 28 5,510 32 5,290 x
x
4.3
x 118 52 79 (3,910) 59 (1,545) (3,110) (1,700) (2,600) (2,070) (1,765)
x x 4.3
0.78 x 3
1,100 (60Hz)
20 x 3 x 8 (20 x 3 x 5 optional)
20 (30 optional)
2.4 for ACC-DXNC Models
2.4 for ACC-DXNC Models
7.5
ACC-DXNC Models
0.00001 Programmed (xO.1) Through / 0.0001 Conversational (x1) / 0.001 (x10)
Software
1.21 -5 .0001 - 3.3 (x1) /0.0005 (x5) /0.002 (x20)
0.004 Programmed 6 - 82- 1.5 Handfeed 0.001 Through (xO.1) per Conversational Graduation / 0.010 (x1) Software / 0.100 (x10)
-
Specifications subject to change without notice.