bladegrinder
Knifemaker / Craftsman / Service Provider
- Joined
- May 4, 2013
- Messages
- 530
Have you tried facing the brushes like I described earlier?
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DC drive w/AC motor?
- Thread starter anvilring
- Start date
Hmm, it remains a mystery. Before giving up, I would double-check the jumper and trimpot settings on the drive. The motor voltage selector is factory set to 90V, did you change that to 180V? There is also a motor current jumper and current limit trimpot that need to be set correctly. The factory settings should be ok, but it can't hurt to double check if you haven't done so already.
bladegrinder
Knifemaker / Craftsman / Service Provider
- Joined
- May 4, 2013
- Messages
- 530
From post #13...
Anvilring, the pictures you posted of the motor brushes don't show what's important...the faces that wear against the armature.
I have the same machine you have there and while mine never slowed down like yours occasionally the motor would want to jog rather than keep a steady speed.
the faces of your brushes could very well be wearing or collecting junk on them affecting the way it runs.
what I do is pull the brushes, put it on a disc grinder, and while holding back the spring from the brush
to keep it flat, just touch it lightly to the grinder to flatten the faces. it's important to just go VERY lightly and keep it square.
doing this occasionally to my motor keeps it running like brand new.
Anvilring, the pictures you posted of the motor brushes don't show what's important...the faces that wear against the armature.
I have the same machine you have there and while mine never slowed down like yours occasionally the motor would want to jog rather than keep a steady speed.
the faces of your brushes could very well be wearing or collecting junk on them affecting the way it runs.
what I do is pull the brushes, put it on a disc grinder, and while holding back the spring from the brush
to keep it flat, just touch it lightly to the grinder to flatten the faces. it's important to just go VERY lightly and keep it square.
doing this occasionally to my motor keeps it running like brand new.
- Joined
- Nov 29, 2000
- Messages
- 2,869
Thanks to all who have posted some help here on this thread especially Hubert S. and blade grinder who suggested refacing the bushings. That worked like a charm. That and resetting a couple of the pots on the new controller. I checked all the jumpers as you said and they are in the right position. I even called the supplier and got someone on the phone who walked through checking all the jumpers. It's still not a two horsepower AC motor setup, but it works pretty good for what I had to spend on it. Now I'm going to reface the bushings on the old one horse motor and set up a disc grinder with that one and it's old controller. Again thanks for all the help!