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View Full Version : AC servo motor bearing, repair myself or not?


Boyan Silyavski
11-10-2020, 11:53 AM
Hi guys,
My gantry left motor started switching off recently. Long story short after disassembled and checked cables, rotating ballnut and so, narrowed it down to stucked servo motor. Rotates very difficult and is grinding like.
400w Samsung AC 230v servo. Should I open try to repair, search for a dedicated repair center o just buy another one/ used/. Of course a job is waiting to be done from 2 days ago...

Motor obviously works, I assume switches off from over current and heat.

Whats your opinion?
mekanik
11-10-2020, 12:43 PM
Hi Boyan
Machine is down with customer waiting, fix it yourself should be quickest option, get it off today get bearings Monday if there's an encoder on the back end take that cover off first to ensure it doesn't get damaged if you can't get an exact match for the bearing number get one that is dimentionally the same(obviously) and you can start using the machine again until you can get the correct bearing.
Regards
Mike
Boyan Silyavski
13-10-2020, 07:36 AM
Disassembled the motor, managed to break the glass disc of the encoder. Oops. Still it was unrepairable, the magnet core was split and broken. I wonder how it worked at all. The bearings were fine. Ordered motor from ebay.
Boyan Silyavski
28-10-2020, 07:25 PM
Just as a side note. Ordered a motor from ebay FA PARTS (https://www.ebay.co.uk/sch/fa-parts/m.html?_nkw=&_armrs=1&_ipg=&_from=)
Super fast response, listed a separate motor for me and in 4 days was here. Thanks god he still has from the Samsung motors. I wonder, how many motors and machines have they disassembled there in a warehouse...
Doddy
28-10-2020, 09:17 PM
Only problem I've had buying CNC parts from South Korea (was a set of linear rails and carriages) - the vendor was too damned honest on the customs declaration form and I had to spend half as much again on import duty/taxes/handling.
m.i.k.e
29-10-2020, 12:04 AM
Only problem I've had buying CNC parts from South Korea (was a set of linear rails and carriages) - the vendor was too damned honest on the customs declaration form and I had to spend half as much again on import duty/taxes/handling.

Ouch!!!
Boyan Silyavski
29-10-2020, 11:00 AM
My vendor was very honest too...