Replacement Brushes For VF-1 problem

[GITRDUN]

I need to replace the motor brushes on my '94 VF-1. We are getting numerous Z axis cable fault alarms and such. Not positive its the brushes but they look terrible, so thats where i am going to start.
Ordered brushes and HAAS sent me the wrong brushes, and the tech i talked to says they will straighten it out. But i have a feeling they will be telling me the brushes for that motor are no longer available or some BS like that. They claim that they dont keep records on machines that old anymore. (so why buy a new machine if 10 years later you cant get service parts for it anymore) They need to think about what the heck they are saying here. Their service sure aint what it used to be.
Does anyone know where i can get brushes for these motors? They are ELECTRO CRAFT motors. But that is the only thing i can read on the motor label, the rest is wiped away long ago. I called Electro Craft and they told me without the motor numbers forget it, also said they dont carry brushes for most of their old brush motors anymore anyway. So im stuck.
Any help is apreciated.

[wms]

No worries..they are avaliable from Haas..

Haas Brush number is 94-4330
Haas Cap number is 94-4332

Caps are more money than brushes..but still neither is much money..just bought some on 10/06

I find Haas service very good..both from the factory and the local guys.. ; )

[Al_The_Man]

If you get stuck for brushes, try Helwig Carbon, they even make up custom ones.
Al.

[GITRDUN]

Ill write down those brush numbers and call HAAS to see if they have them. The brushes they sent me are #94-4329.
Thanks for the help.

[gar]

070307-1730 EST USA

GITRDUN:

Real important to get the carbon dust out of the motor. You can use air pressure, but do not introduce contamination.

.

[GITRDUN]

Thanks for the help and info. I assume just blowing through the brush holes will get rid of most of the left over dust.
I was maybe a little harsh on the HAAS service dept earlier. I will admit the NYMAT corp which now handles the Haas service is much better than a few other manufacturers i have dealt with. But they also have a problem with keeping well trained service techs around here. Most of the time the guy that shows up is still under training.

[gar]

070307-2033 EST USA

Yes blowing thru the brush holes. Important no oil or water in the air line. Maybe use CO2 from a tank. Make sure there are no chips around to blow into the the motor.

You really do not want to pull one of the permanent magnetic motors apart.

Something like a minimum of 1 or several megohms shunt resistance from the brushes to enclosure was a problem for HAAS. It does not take too much carbon to get the resistance that low. Note a megohm is pretty high for may kinds of applications.

.

[wms]

I assume just blowing through the brush holes will get rid of most of the left over dust.

I prefer to vacuum the dust out not blow it..much better..if you blow it you can get it all in the motor and possibly the encoder too..