Thread: Kondia table power feed question

Hello all

As some of you may know I purchased A Kondia mill last year in a not going condition.
I have adapted a 3 phase motor and set up a VFD. So that is now sorted.

This brings me to the power feed for the table. It looks like Kondia had two types. Mine has a 110V motor and a variable pot on the front.

In short it does not work but does make a humming noise. The cover was only held on by one screw so I would say someone has been in there before.

Does anyone know if the motor is a 110 DC or AC motor. I know the controller is fed by single phase 110 AC. If it is a DC motor I can get a generic controller. If it is AC I am more confused as I did not think AC motors liked been speed controlled.

Thanks for any information on these controllers.

Steve

Hi there,

If it's made by servo which is a US made brand then it will have what is called a Universal motor. These can run on either AC or DC.

I think the speed control circuitry uses a chopped or pulsed DC input to the motor. Or, it may vary the duty cycle of the excitation field. Not quite sure. I'm not an expert on these things.

A picture would be good..

Simon

Sent from a galaxy far far away

Originally Posted by simonl

Hi there,

If it's made by servo which is a US made brand then it will have what is called a Universal motor. These can run on either AC or DC.

I think the speed control circuitry uses a chopped or pulsed DC input to the motor. Or, it may vary the duty cycle of the excitation field. Not quite sure. I'm not an expert on these things.

A picture would be good..

Simon

Sent from a galaxy far far away

Hi Simon,

If it has brush gear then it is likely a Universal motor ! If not then it is definitely an AC motor.