Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set User Manual
Page 585
Cylindrical Grinding Fixed Cycles
Chapter 17
17-11
This parameter is not “program modal.” If a value for the number of dress
executions is not programmed, then the dress program P is not executed
for that cycle. This does not affect pre-dress requests or operator requested
dressing as described in chapter 21.
The format for the G81 reciprocation mode is as follows:
G81Z__K__E__P__;
G81Y__J__E__P__;
G81X__I__E__P__;
Table 17.A summarizes the G81 mode parameters. For a detailed
description of these parameters, see the text below and page 17-9.
Table 17.A
G81 Mode Parameters
Parameter:
Definition:
Default Value:
Possible Value:
Programmed 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.
E
3
reciprocation feedrate
from last cycle or last F
valid F word
P
3 for G81 2 for G81.1
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
Programming a G81 causes the control to execute a grinding reciprocation
without a coordinated pick or plunge motion. The G81.1 is identical, but
begins with a pre-dress operation prior to the reciprocation move.
Reciprocation motion is described on page 17-5.
This reciprocation move is executed on whichever axis is programmed in
the G81 block, regardless of the active plane. The value entered with the
axis programmed defines the distance to (G91) or absolute coordinate of
(G90) the primary reversal point for the reciprocation axis. The integrand
for the axis programmed defines the distance to (G91) or absolute
coordinate of (G90) the primary reversal point for the reciprocation axis.
Important: If your reciprocating axis is configured as a diameter axis in
AMP, your reciprocation reversal points are altered by radius or diameter
mode (G07/G08).
17.3
G81 or G81.1 Reciprocation
Without Plunge