Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set User Manual
Page 180
Servo Parameters
Chapter 7
7-34
Axis
Parameter
Number
Axis
Parameter
Number
(1)
[1730]
(9)
[9730]
(2)
[2730]
(10)
[10730]
(3)
[3730]
(11)
[11730]
(4)
[4730]
(12)
[12730]
(5)
[5730]
(13)
[13730]
(6)
[6730]
(14)
[14730]
(7)
[7730]
(15)
[15730]
(8)
[8730]
Range
0 to 214.10000 mm or 0 to 8.42913 in. (linear axes)
0 to 720.00000 degrees (closed--loop spindles)
0 to 214.00000 degrees (rotary axes)
Notes
Higher gain is necessary for contouring accuracy. Reduced gain at higher
feedrates helps reduce stress on the axis mechanism.
It is impossible to contour accurately above the gain break point, therefore,
it is necessary for the Gain Break to occur at a feedrate above the
maximum allowable cutting feedrate. A typical value for gain break point
(also the minimum value) can be calculated by:
(maximum contouring speed) (.001)
Gain Break Point =
------------------------------------
(Initial Gain of Position Loop)
If the gain break point is below the maximum contouring speed, contours
will be inaccurate.
On spindle applications, this parameter is only applied to the servo while
the spindle is orienting or tapping.
This parameter must be set independently for each servo.