Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 600)

Cylindrical Grinding Fixed Cycles
Chapter 17
17-26
Q -- plunge shift. The value entered here is an incremental value used to
indicate the distance that the Z axis is to shift after the plunge axis has
retracted. This shift takes place after the plunge axis has retracted and is
executed at the rapid feedrate for the Z axis.
If no value is entered for this then no shift is made. If a value greater than
or equal to Z is entered, then the shift is made only to the last plunge point
defined by Z. 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 G86 cycle is as follows:
G18;
G86Z__X__L__F__P__;
Table 17.F summarizes the G86 cycle parameters. For a detailed
description of these parameters, see the text below and page 17-9.
Table 17.F
G86 Cycle Parameters
Parameter: Definition: Default Value: Possible Value:
Plane axis 1 1 plunge end point value must be programmed abs. or inc.
Plane axis 2 1 plunge end point value must be programmed abs. or inc.
L 3 number of spark-out revolutions zero zero to 999
F 2 plunge feedrate last feedrate programmed valid F word
P 3 for G86 2 for G86.1 dress program number from last cycle programmed valid program number
1 must be programmed 2 must have been programmed in some previous block if omitted 3 optional
Figure 17.7 shows the axis motions that make up the G86 shoulder
grinding cycle. This figure assumes that the ZX plane (G18) is active.
17.8
G86 or G86.1 Shoulder
Grinding