Yaskawa Servo Selection

I am attempting to retrofit a Dyna Myte 3000 lathe with:

Mesa 6i25/7i77
Bardac 1600i DC drive for the SEM MT34U48 on the spindle
Yaskawa SGDV Analog/Pulse Train Type drives for the axes and turret

My main worry is that I have bought the wrong servos to work with LinuxCNC. The ones I have purchased are all absolute encoders vs the incremental models. Is it possible to make these work well or am I better off getting the incremental setup.. If I need to provide more information I will be glad to do so. This has also made worry that I might be making other selection errors which is why I listed everything.

It looks like CN1 pins 17-22 offer incremental encoder output for LinuxCNC to use.

Yes, on modern AC servos the encoder type does not matter since the encoder
signals only go to the drive (and the drive usually provides a simulated incremental
output to the controller)

This is excellent news. Thanks to the both of you. I was really worried that I had chosen wrong after reading through some older posts.

Tywash wrote: I am attempting to retrofit a Dyna Myte 3000 lathe with:

Mesa 6i25/7i77
Bardac 1600i DC drive for the SEM MT34U48 on the spindle
Yaskawa SGDV Analog/Pulse Train Type drives for the axes and turret

My main worry is that I have bought the wrong servos to work with LinuxCNC. The ones I have purchased are all absolute encoders vs the incremental models. Is it possible to make these work well or am I better off getting the incremental setup.. If I need to provide more information I will be glad to do so. This has also made worry that I might be making other selection errors which is why I listed everything.

Tywash I am using a similar set-up. I am using SGDA 01AS in torque mode and a Mesa 6i25 / 7i77 combination. An AMD Gizmosphere plus a PCIE board that I designed, (iBOB2) runs the entire system using PathPilot.
Make sure that you program your servo drives correctly and set them for the correct motor type. A AMC DC servo amp drives the SEM spindle motor.

Iron-Man

I can also answer any questions you may have about the setup. Similar to Iron-man I have SGMJV-08A running off SDGV-05RA servo packs on single phase 220V.


The servopacks will take the absolute encoder data in and output a incremental signal instead provided you got the analog servopacks.


Mesa 5i25/7i77/7i84 setup