Rockwell Automation LDC Iron Core Linear Servo Motors - Manual (Page 59)

Rockwell Automation Publication LDC-UM001B-EN-P - March 2011 59
Configure and Start Up the LDC-Series Linear Motor Chapter 6
10. Click the Homing tab.
11. From the Sequence pull-down menu, choose Switch-Marker, or Torque
Level-Marker when a repeatable power-up position is desired.
Typical linear TTL and Sin/Cos encoders will home repeatability to
within one count of resolution when their index mark is used.