Ben

G5 Series Servo Overload

3 posts in this topic

Hello, I am using R88D-KN08H-ML2 servo drive with R88M-K75030T-S motor. PLC is CJ2M-CPU35, with NCF71 position control unit. There are total of 6 axis and the one in question with above combination is giving me trouble, rest 5 work OK. I get Overload trip error even at 200% of torque. The motor doesn't move at all. After disconnecting motor power cable, it is possible to move the assembly by hand so nothing sems to be jammed or binding. Tried Auto-Tune, ended with successful completion (at least no errors etc). But scenario didn't change. Motor doesn't have brake, as per model number as well as physically no brake cable on motor. Since all other axes are moving, with similar setting, not sure what is going on here! Any parameters I can change? Any other way to check?

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Update: So I removed th motor from assembly, it was free to move. Still same overload error!! Removed both power and resolver cables, pins were okay too. Put it back (electrician), tightened it. Wallah.... Probably a loose connection on power cord? I noticed one screw out of 4 missing on power connector.

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If you look at the troubleshooting manual of the Drive, an improper wiring of the power cable can cause Overload error. I received lot of complaints, saying that the servo has a very low torque limit / parameter problems, only to went to the site and see lot of loose connections to the power cable on the drive side

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