YASKAWA SGLGW User Manual page 163

5 Trial Operation (Checking Linear Servomotor Operation)
Note:
5-26
• Unsuccessful Trial Operations
An unsuccessful trial operation could be attributed to the following conditions. Check
the conditions and take appropriate measures.
• The force reference is saturated because the load is too heavy, or the jog speed is too
fast. 
Lower the jog speed or lighten the load.
• The linear servomotor is moving slightly and then stops.
The linear servomotor and linear scale are not in agreement. Check the wiring, scale
pitch setting, linear scale count, and whether the motor forward direction matches the
scale count direction.
• Polarity detection is not being performed normally.
Refer to 5.5 Polarity Detection to execute the polarity detection.
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