Yaskawa Σ-mini Series - Manual (Page 20)

6 OPERATION
E - 16
6 OPERATION
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Conducting test run for Servomotor without load
When Servomotor is operated without load, set the speed loop gain (user constant Cn-04) to
40 or less. (Factory setting is 80)
Speed loop gain(user constant Cn-04) is determined by the following conditions:
Load inertia ≥motor inertia ×3
Therefore, when motor is rotated without load (without load inertia) or load inertia is small,
if the value has been kept at the factory setting, the motor may oscillate.
To avoid this, make sure to set the value of Cn-04 (speed loop gain) to 40 or less and then servo
ON.
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Conducting test run with Servomotor connected to machine
SERVOPACK initial user constants setting is performed supposing the normal operation
conditions.
Before test run, set up user constants suitable for the machine.
Failure to set up the user constants initial setting may result in machine overrun or breakdown.
As for the setting procedures and methods, refer to “Digital Operator Operation
Manual.”
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Check items during test run
The following items should be checked during the test run.
D Unusual vibration
D Abnormal noise
D Excessive temperature rise