Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set User Manual
Page 570
Surface Grinding Fixed Cycles
Chapter 16
16-20
For example, assume that the G19 (YZ) plane is active and you have
configured the Y axis as axis one and the Z axis as axis two for that plane.
The G84 cycle would execute as described for the G83 cycle except that
the cross pick moves would be made by the Y axis and the plunge moves
would be made by the Z axis.
Important: It is the programmer’s responsibility to make sure that the
crossover and reciprocating moves extend beyond the part sufficiently such
that the plunge move can be completed before the wheel comes back in
contact with the part. Crossover and plunge moves begin as the
reciprocation axis decelerates. Therefore, feedrate, acceleration and
deceleration should be considered for all axes involved.
The format for the G85 cycle is as follows:
G17(XY);
G85Z__K__X__I__Y__Q__L__F__E__P__D__;
G18(ZX);
G85Y__J__Z__K__X__Q__L__F__E__P__D__;
G19(YZ);
G85X__I__Y__J__Z__Q__L__F__E__P__D__;
Table 16.E summarizes the G85 cycle parameters. For a detailed
description of these parameters, see the text below and page 16-8.
Table 16.E
G85 Cycle Parameters
Parameter:
Definition:
Default Value:
Possible Value:
Non-plane axis
2
reciprocation primary reversal point
from last cycle programmed
abs. or inc.
Reciprocation axis integrand
3
reciprocation secondary reversal point
from last cycle programmed
abs. or inc.
Plane axis 1
2
plunge depth
from last cycle programmed
abs. or inc.
Plane axis 1 integrand
2
plunge pick at start
from last cycle programmed
inc. only
Q
3
plunge pick at crossover
plunge pick at start
inc. only
Plane axis 2
2
crossover amount
from last cycle programmed
abs. or inc.
L
3
number of spark-out passes
zero
zero to 999
F
2
plunge pick and crossover feedrate
last feedrate programmed
valid F word
E
3
reciprocation feedrate
from last cycle or last F
valid F word
P
3 for G85 2 for G85.1
dress program number
from last cycle programmed
valid program number
D
3
number of auto-dress executions
zero
zero to 999
1
must be programmed
2
must have been programmed in some previous block if omitted
3
optional
16.7
G85 or G85.1 Continuous
Plane Grinding (Axis 1)