Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set User Manual
Page 454
Axis Motion
Chapter 12
12-82
This feature disables the axis position display and lets an axis be clamped
into position. Typically an axis clamp is performed by the execution of an
M code in a part program or by a switch of some type controlled by the
operator. Your system installer determines how the axis clamp feature is
enabled in PAL. Refer to the documentation prepared by your system
installer for details.
When an axis is clamped, the control freezes the axis position display
values. Any axis drift or movement caused by some external force does
not generate any corrective response from the axis servo. This prevents the
servo from trying to move an axis that may have been mechanically
clamped to prevent movement.
Any axis movement when that axis is clamped is added to the current value
of the following error and can be viewed on the screen displaying
following error (refer to the integration/maintenance manual). If the axis
following error exceeds the allowable maximum following error (set in
AMP), an error is generated and the control goes into E-Stop.
When the axis is unclamped, the control position display is reactivated and
the servo returns the axis to the necessary position for zero following error.
This section covers these topics:
Topic:
On page:
Parking a Dual Axis
12-84
Homing a Dual Axis
12-85
Programming a Dual Axis
12-86
Offset Management for a Dual Axis
12-88
The dual axis feature lets you simultaneously control multiple axes while
commanding only one. The command, either for a manual jog or a
programmed motion, is automatically directed to the other axes in the dual
group. It differs from the split axis feature of the control in that the split
axis feature controls a single axis positioned by two servo motors.
Implementation of the dual axis feature can require significant PAL
modification as well as proper AMP configuration. The dual axis feature
is an option. Refer to the documentation prepared by your system installer
to see if the dual axis option has been purchased and set up for your
machine.
Figure 12.41 shows a typical configuration for dual axes.
12.12
Axis Clamp
12.13
Dual Axis Operation