The format for the g86 cycle is as follows – Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set User Manual
Page 573
Surface Grinding Fixed Cycles
Chapter 16
16-23
The format for the G86 cycle is as follows:
G17(XY);
G86Z__K__X__I__Y__Q__L__F__E__P__D__;
G18(zx);
G86Y__J__Z__K__X__Q__L__F__E__P__D__;
G19(YZ);
G86X__I__Y__J__Z__Q__L__F__E__P__D__;
Table 16.F summarizes the G86 cycle parameters. For a detailed
description of these parameters, see the text below and page 16-8.
Table 16.F
G86 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
crossover amount
from last cycle programmed
abs. or inc.
Plane axis 2
2
plunge depth
from last cycle programmed
abs. or inc.
Plane axis 2 integrand
2
plunge pick at start
from last cycle programmed
inc. only
R
3
plunge pick at crossover
plunge pick at start
inc. only
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 G86 2 for G86.1
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 16.6 in the previous section shows the axis motions that make up
the G85 continuous plane grinding cycle when the G19 (YZ) plane is
active. For the G86 cycle, these motions would be identical except that the
Z axis (plane axis 2 for G19) would be the plunge axis.
Programming a G86 or G86.1 causes the control to execute a continuous
plane grinding cycle using three axes. “Continuous” refers to the fact that
instead of making cross pick moves, the crossover axis moves
continuously towards its endpoint as the reciprocating axis moves back and
forth across the part. The G86.1 begins with a pre-dress operation prior to
the grind.
16.8
G86 or G86.1 Continuous
Plane Grinding (Axis 2)