Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 615)

Cylindrical Grinding Fixed Cycles
Chapter 17
17-41
Figure 17.13
G89 Plunge with Micro-Feed
@F
@E
@,F
R
I
Q
Rapid Moves
Start Point
X
@,F Micro-Feed
Normal Mode Plunge Two-Step Mode Plunge
@F
@E
@,F
R
I
Q
Start Point
X
Micro-Feed
Prog. Z
Prog. Z
When the rapid positioning at the start of the cycle ends, the control checks
to see if PAL has enabled the micro-feed feature. Refer to your system
installers documentation for details on how this feature is enabled. If
micro-feed is not enabled, the fine plunge stops when the programmed X
axis endpoint is reached.
If the micro-feed is enabled, the fine plunge endpoint is extended beyond
the programmed X plunge depth. The system installer should have devised
an input to PAL that aborts the fine plunge at any point (before or after the
micro-feed portion of the fine plunge). This input is called a skip signal.
Refer to the system installers documentation for details on how to abort the
fine plunge.
Important: If no fine feed portion of the cycle is programmed (no Q word
in the cycle) then the micro feed feature can not be enabled and is not
performed.