Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 202)

Servo Parameters
Chapter 7
7-56
Axis Parameter
Number
Axis Parameter
Number
(1) [1026] (7) [7026]
(2) [2026] (8) [8026]
(3) [3026] (9) [9026]
(4) [4026] (10) [10026]
(5) [5026] (11) [11026]
(6) [6026] (12) [12026]
Range
1 to 32767
Notes
When configuring any closed--loop axis you must configure two gear ratios
for feedback; one for velocity feedback, the other for position feedback.
On axes with a single feedback device, the setup and gear ratios should be
identical for position and velocity feedback since the same device is being
used for both feedback types.
This parameter must be set independently for each axis.
Function
If you are using the same physical device for both the velocity loop and
position loops, then the value entered for this parameter should be the same
as the value entered for the parameter Teeth on Motor Gear For Vel FB .
If you are using a non--motor--mounted position feedback device
(connected to a different feedback port than the velocity feedback), enter
the number of teeth on the gear or gearbelt pulley attached to the lead
screw. This number is used in conjunction with the parameter Teeth on
Gear for Position FB to calculate the gear ratio from the position
feedback device to the lead screw (number of lead screw revolutions that
occur between position feedback device revolutions). The control then
uses this ratio combined with the entered Lead Screw Thread Pitch and
Position Feedback Counts/Cycle to determine the number of feedback
counts that occur per unit of axis travel.
7.2.16
Teeth on Lead Screw for
Position Feedback