I have been doing a fair amount of scrapping CNC equipment, lately.
It works out great, typically just the ironplus copper wires pays me back 2x what I pay for the machine, and then I am left with servo motors, boards, hydraulic pumps, coolant pumps, etc to sell.
But, at the same time I feel that listing and saying things like "this motor comes from an obsolete piece of CNC equipment that belonged to a bankrupt company" does not let me get the highest value for the item.
Whiel I have no hope of being able to test boards, I do feel that I could adequately test the motors.
So, what would constitute a good test of an AC servo motor like a red cap Fanuc motor?
I see a few things.
- Run it from a VFD and measure vibration
- Somehow test the encoder.
Anything else?
I know that there are companies that buy those motors for $200 each, refurbish and test them professionally (this involves change of bearings, rebalancing etc) and sell for 2,000 each. I would like to be able to do the same and can invest a few grand into scavenging proper test setups.
Any comments?
i