Mesa 8i20

This is my first post. I posted this over on cnc zone didn't get much of a response. Could you run 2 750 watt ac servos on the same axis with 1 8i20 if you mounted a encoder for feed back on the lead screw. The reason I ask is I already have the servos.
Thank you.

Not clear, 2 motors acting as one, meaning geared/puleyed to the SAME ballscrew ?
That will work, but fuzzy on the details, still, as to why ?

Why cost savings. I am converting my American pacemaker lathe to cnc. This lathe will swing 19" 36" between centers weighs 9000lbs. I already have 4 new 750 watt ac servos motors. I feel 750 watts is not enough on Z axis. Also it has a linear scale for the digital read out could I use this as a encoder? You guys are the experts and I am open to any suggestions. Yes with belt and pulley or motor on each end direct drive
Thank You

If used direct drive I could just use one of the original encoders.

Linuxcnc can work with some linear encoders, it can also use two feedback devices, meaning you can have an encoder on the motor and a linear scale for the same axis.
8i20 is a single 3 phase motor drive, so it can drive a single motor.
Maybe, just maybe it would work with two parallel motors of the SAME type and with one single encoder feeding back to linuxcnc, motors would have to be coupled together via pulley or gears at strictly 1:1 ratio, but i never tried this so it is uncertain.
You can test with a single motor and check if it has enough power/torque, or use reduction to gain some torque as it would have enough speed even at 1:10 gearing.

You would also need both rotors aligned...

I will probably use gearing and go with one servo.
Thanks for the replies.
When I get started I will post my machine build probably in the spring.

PCW wrote: You would also need both rotors aligned...

But, once you did that, it ought to work.

Interesting idea.

How would you go about aligning the rotors.

Keyways in the same position in regard to the motors.