Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 345)

Spindle 1 Parameters
Chapter 12
12-17
Function
This parameter determines a positioning range (in degrees) that the spindle
must be within for the control to consider the spindle “in position.”
When the spindle position is within this range, the control closes the
positioning loop (even though spindles are always configured as “Open
Loop”) to move and hold the spindle at the commanded position.
The control also sets a PAL flag indicating that the spindle is in position.
Therefore, this parameter requires proper PAL programming to be fully
effective. Refer to the notes below.
Important: If too small a value is entered here, the “Spindle Orientation
Complete” flag in PAL may never be set “TRUE.” Allowances must be
made for positioning accuracy and inherent instabilities.
Refer to your programming and operation manuals for more information
on spindle orient.
Spindle Parameter
Number
1 [859]
Range
0.000000 to 360.000000 degrees
Notes
The value entered here sets the farthest distance (in either the positive or
negative directions) that the spindle can be from its programmed
destination to be considered “in position” for orient operations.
This does not affect the final positioning accuracy of the system. It simply
determines how close to the commanded position the spindle must be
before the PAL flag “Spindle Orientation Complete” is set “TRUE.”
This parameter must be set for each spindle axis.
12.13
Orient Inposition Band