Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set User Manual
Page 597
Cylindrical Grinding Fixed Cycles
Chapter 17
17-23
If no value is entered for Q then no shift is made. If a value greater than or
equal to X is entered, then the shift is made only to the last plunge point
defined by X. If the sign of the value entered here sends the axis away
from the last plunge point instead of towards it, an error is generated.
L, F, E, P, and D -- These parameters were described on page 17-9.
The format for the G85 cycle is as follows:
G18;
G85Z__K__X__Q__L__F__E__P__D__;
Table 17.E summarizes the G85 cycle parameters. For a detailed
description of these parameters, see the text below and page 17-9.
Table 17.E
G85 Cycle Parameters
Parameter:
Definition:
Default Value:
Possible Value:
Plane axis 1
3
last plunge point
none (plunge at start only)
abs. or inc.
Plane axis 1 integrand
3
dither amount
zero
inc. only
Plane axis 2
1
plunge depth
value must be programmed
abs. or inc.
Q
3
plunge shift
zero
inc. only
L
3
number of spark-out passes or revolutions
zero
zero to 999
F
2
plunge feedrate
last feedrate programmed
valid F word
E
3
dither feedrate
plunge feedrate
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
Figure 17.6 shows the axis motions that make up the G85 multi-pass
diameter grinding cycle. This figure assumes that the ZX plane (G18) is
active.
17.7
G85 or G85.1 Multi-pass
Diameter Grinding (Axis 2)