Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 110)

Manual/MDI Operation Modes
Chapter 4
4-6
The manual gap elimination feature allows the operator to manually jog the
grinding wheel without interrupting reciprocation. Using this feature, the
operator can speed up the grinding process by skipping over reciprocation
strokes that are not making wheel contact with the part.
Figure 4.2
Large Gap between Start Point of Cycle and Actual Part Location
Part
Reciprocation
Start
Cycle
These passes do not cut
material and can be
eliminated with manual
gap elimination.
12000-I
The manual gap elimination feature is available only when reciprocation is
active on the control. You can activate reciprocation by using G81
reciprocation startup, or through one of the fixed cycles described in
chapter 16 and 17.
You can perform manual gap elimination in either Auto or MDI modes.
Your system installer must write PAL to allow execution of manual gap
elimination in automatic or MDI mode. See ‘jog on the fly’ in your PAL
manual or see documentation provided by your system installer. In AUTO
or MDI modes, you can perform manual gap elimination during block
execution.
You cannot perform manual gap elimination in these cases:
Any axis that is performing a circular motion cannot be jogged until that
circular motion is complete
If during the course of the gap elimination, a circular move is performed,
the gap elimination jog is aborted until the circular move is completed.
While the control is performing a block retrace or returning from block
retrace (see page 7-30)
During dresser/wheel radius compensation
4.3
Manual Gap Elimination