Okuma lathe conversion.

timewarp wrote: Thanks Andy, so now i am looking for 2 encoders with a hollow shaft of either 10mm, 25mm or tapered. With commutation. Absolute and differential right?

This might be worth reading:
www.cui.com/product/resource/amt303-series-comm-encoders.pdf

You might end up having to make an adaptor for the tapered shaft.

Thanks Andy, I had looked at those encoders, I thinks I will order one and see if I can adapt it to a 10mm shaft. am I going to need the demo board?

Paul

You might need the demo board to program them. I am not sure.

Which drives are you going to use?

I have not figured out what I am going to use for drives. I have some vfd drives from emerson/control technologies that might work but i would need a card to put in them I think. I also have been looking at amc as they seem cheap and popular.

timewarp wrote: I have not figured out what I am going to use for drives. I have some vfd drives from emerson/control technologies that might work but i would need a card to put in them I think. I also have been looking at amc as they seem cheap and popular.

I assume that your motors are brushless? In that case most types of VFD won't work (CT Unidrive will, with the right setup, if that is what you have).

AMC drives with hall-sensor inputs will work with the commutation encoders.

You _can_ commutate with a normal encoder with software in LinuxCNC, but I don't really like to recommend it for an axis.

If you get the commutation sensors aligned correctly then the Mesa 8i20 with software commutation is an option.
What is the power and voltage rating of the motors?

I picked up 3 unidrive 1402's here locally, but don't have the servo card with them, some modbus card?
There is a photo of one of the servo nameplates on page 1, other axis motor is 2kw i think.