Setup Procedure Using Linear Servomotors Without Hall Sensors - YASKAWA SGLFW User Manual

9 Operation

9.2.3 Setup Procedure Using Linear Servomotors without Hall Sensors

9.2.3 Setup Procedure Using Linear Servomotors without Hall Sensors

Perform the following steps 1 to 13.
(1) Checking Operating Conditions
Make sure that the following conditions are satisfied when performing polarity detection.
• No problems when linear servomotor is moved approximately 2 mm.
• Scale pitch must be within 100 µm (within 40 µm recommended).
• Minimum unequal external force on the linear servomotor (5% max. of rated force is recommended).
• Mass ratio less than 30 times.
• On a horizontal axis.
• Friction on the guide is a percentage of the rated force (air slide not used).
(2) Installation and Wiring the Linear Servomotor and Linear Scale
Install the coil assembly and linear scale so that the motor forward direction and linear scale count direction are
the same.
If the motor forward direction and linear scale count directions do not match and the linear servomotor is
IMPORTANT
run in this state, the linear servomotor may not operate or overrun may occur.
When using linear Σ-series servomotors, the motor forward direction (coil assembly's direction of progression
when current flows in phase order U, V, and W) is toward the side from which the cable is extended. The analog
1-V p-p voltage input from the linear scale to the serial converter unit is counted up during phase A (cos signal)
progression.
9-12
Coil assembly cable
+
Phase A progression
−
(pulse increase)
Phase B progression
(pulse decrease)