I should have said they were the yellow cap/DC motors. Sorry about that. The brushes are about 3/4" long and look good to me. I am pretty sure that its a bad bearing unless something came loose inside and was causing the clunking and squeaking. I have signed up over at Fanuc and am hoping to be able to get some parts drawings before i take the servo motor apart.

I pulled the motor apart tonite and both bearings are shot. I am going to try and find some locally and get this machine running tomorrow. Thanks again for all the advice Petro, and codyst. I will let you know how it all works out.

I replaced the bearings and put the motor back together. Got it back on the machine and was able to zero the machine. The bad news is within seconds of running the machine/program, the noise started again. And in about a minute it overloaded. This was the first the first motor I have ever taken apart, and Im now guessing that the noise/problem is coming from 3 of the 4 magnet strips not being attatched to the outer body/tube. I wondered if that was ok when it was apart, and Im now guessing its not ok. Do you think that could be the problem? Is it possible to re attatch those magnet strips to the body/tube? Thanks for your time on this.

I went ahead and ordered some Loctite® E-20NSTM HysolTM epoxy adhesive. Its made to Bond magnets to the steel housing in DC motors. Petro, do you know anyone who has done this?

No I don't, I usually just order a new one if its not the brushes

I didnt think many people would try it. I have to admit if I was at work, and my boss asked me if I could repair a servo motor. I would have most likely told him no. This machine is a hobby based machine in my personal shop. Which is mainly a 1800 sf garage for all my personal projects/hobbies. I will give the glue a try and let you know how it goes. I should be getting the glue tues pm.

I got 2 of the magnets glued in the housing last nite. I ran out of room for clamps, so I glued the 3rd magnet in tonite. Tomorrow nite I will put the motor together and see if it works.

I now have a new alarm code. Its a servo alarm 11, (x axis). In rapid mode the machine moves approx .02 and then alarm. With the hand wheel it will move .0002 and then surge approx .32 and then alarm.

I took the motor apart and put it back together this morning. Now I get a servo alarm 02 (vrdy) It also trips the same reset button as the 01 overload alarm.

I walked away from this problem early Sat am. It has been all ive been concentrating on for a few weeks, and I needed to get some other things done. While I wasnt working on the servo motor it dawned on me that I might have got the magnets glued into place upside down. I know they are in the right place but might be 180 degrees out. Now I need to try and figure out how to get the magnets "un" glued from the housing and to figure out how to check for proper installation. I will let you all know what I end up doing.

Does anyone have a source for used servo motors?

Or possibly a new servo motor?