Dc servo motor control

It will do just fine, just add an isolated power supply for it, and make sure the 0V on that power supply is not grounded.
New power supplies are mostly not grounded on the output, older ones were always grounded to 0V.
Even this can be fixed by opening the power supply and isolating 0V from ground.
Put it as close to the drive as you can and use short wires.

Ok, providing the power supply is not grounded I use pin 4 gnd 0v on the motor controller to connect my isolated power supply 0v and my signal 0v from the mesa on the same pin?

Yes, the analog gnd to 0V on the drive pin4 i think.

Thanks, il give that a go. I was set to start servo tuning, I had the single servo enable from the esab just done through an estop however i have now wired it through a ss relay to one of the 7i77 outputs, I selected "machine is enabled" in the pnc config, it works ok in halshow using the sets command 0/1 but has no functionality in the qtplasmac interface, do i need to wire each sevo enable individually?

Also I can check the y tandem encoder in halshow however I dont know how to test motor direction,  I could test all the other motors direction and encoders in pncconfig but it does not have a setting screen for y tandem

Sorry this was an accidental double post

All enables can be on one wire, that is how they are in the original control, so there is no use in having them separate.
For encoder and direction and tuning, use the "calibration" from the "machine" menu. For changing direction a simple - in front of the encoder or output value is required.
But first, make sure the encoders are counting in the right direction, look at the DRO on screen, the counts should go up when machine goes to the right for X axis and away from you on the Y axis.