Okuma lathe conversion.

timewarp wrote: If I could figure out how to reuse the servos, either with the drives or with different drives that would my first choice.

The drives probably take a +/- 10V input, and handle the encoder internally. If they do, then you may be (almost) home and dry.

Here is a page from the wiring manual, does it help?

It is starting to look not 100% trivial...

It looks like sin/cos encoders converted to a serial data format by the OSP700L board. That also seems to create 3 commutation signals (COMA1, COMB1, COMC1)

That diagram doesn't seem to show where the motion controller connects to the servo amplifier?

I think I am going to look for new servos with usable encoders as the motors and drives probably have some value.
Is there a standard for servo motor mounts (Nema?) Bolt pattern looks to be about 150mm.
Are all Fanuc Red cap motors usable with the pico adapter?
Here is the Servo I have.



When looking for a new servo What is the most important to look for? Output,torque,rpm?

Just ordered some mesa cards - 5i25, 7i77, 7i69

Thanks again, Paul

It would be much more satisfying to work out how to interface the original encoders.
However the combination of data / strobe / clock seems a bit unusual. It is possible that it is SPI, though, and I think I would try connecting to a Mesa BSPI channel to see what comes out.

Have you seen this?
s3.amazonaws.com/Icarus/DOCUMENTS/Okuma_Manuals_614.pdf

Thamks Andy, Yes I have that manual. I think figuring the encoders might be beyond my skill level. At this point I am going to look for replacement servos. I might already have some drives that could work. Just bought a 15hp vfd for the spindle.