bridgeport clone cnc conversion

[diycnc]

here is a pic showing some recent progress on my milling machine conversion.

[diycnc]

here is the controller. it spent the first 15 years of its life a kenwood power amp, room for one more axis...

[diycnc]

[diycnc]

is it normal to have to break in servo motors before using them?

the motor i got from kelling the brush was only making contact on the very outside, it would run fine on dc power but the servo controller had a very hard time controlling it.. it sounded like it was full of rocks...

i run it for 30min on 72v with no load and now it works great...

is there a better way to break these in?

[VooDooMan]

Looking great brad pitt.
Need more pictures!

[TOTALLYRC]

Originally Posted by diycnc is it normal to have to break in servo motors before using them? the motor i got from kelling the brush was only making contact on the very outside, it would run fine on dc power but the servo controller had a very hard time controlling it.. it sounded like it was full of rocks... i run it for 30min on 72v with no load and now it works great... is there a better way to break these in?

When I am in a hurry, I will take a pass at the brush with a round file to approximate the armature contour. A 1/2 hour isn't bad at all. If you blow the brush dust out of the motor, try not to breath it as it is not good for your lungs.

I would do the break in at a lower voltage. It will take longer but I don't like running motors unloaded at or near their max voltage.
Also consider doing it in both directions sine it runs both ways in use. Probably won't make much difference but what the hey.

[diycnc]

motors are 90v and i run them at 72. they didn't even get warm.

it also seems that 2 of my motors weren't tight so i don't know if they are lined up proper, the center part looked like it could have turned.