Rockwell Automation MPMA Integrated Multi-Axis Linear Stages - Manual (Page 59)

Rockwell Automation Publication MPMA-UM001B-EN-P - November 2010 59
Configuration Guidelines Chapter 6
7. In the Motor Encoder Units pull-down menu, enter the appropriate values
from the tables on
page 59 .
Velocity, position, and acceleration counts per unit are based on the selected User
Units (mm or in.).
Table 4 - Direct Drive Linear Stage Distance Unit Settings
User Unit Scaling Parameters (1)
(1) User units are determined by the screw lead of the linear stage. The screw lead is defined in linear units of
travel per revolution. For example, the travel per revolution of an MPAS-xxxxxx-V20xxx is 20 mm/rev. MP-
Series Integrated Linear Stages with a ball screw use a feedback device that provides 128 sin/cos cycles per
revolution of the motor. The Ultra3000 drive interpolates this signal by an additional 1024, causing the
maximum count per internal motor revolution of the linear stage to be 131,072 counts/rev.
Distance Units for Ball Screw Linear Stages
Metric English
MPAS-xxxxxx-V20xxx MPAS-xxxxxx-V20xxx
Velocity Label mm/s in./s
Velocity Scale 6553.6 166461.44
Position Label mm in.
Position Scale 6553.6 166461.44
Acceleration Label mm/s/s in./s/s
Acceleration Scale 6553.6 166461.44
User Unit Scaling Parameters Distance Units
Metric
English
Velocity Label mm/s in./s
Velocity Scale 200 5080
Position Label mm in.
Position Scale 200 5080
Acceleration Label mm/s/s in./s/s
Acceleration Scale 200 5080