Using the DMM 1.8 KW Servo motor for a mill spindle

[Accu-Slice]

I have been working on trying to hook up a DMM 1.8 KW Servo motor for use as a spindle motor on my PM30MV mill. The problem that I am currently seeing is that the servo motor is running constantly at around 150 rpm. I did change the OnPosRange to 111 and the MaxSpeed to 13 as suggested by DMM with no change. The servo motor works fine in the DMM tuning program using the RS232 hookup, but as soon as I change it to Analog and Speed Servo the servo rotates continuously. I am able to change the speed to a higher value as well as reverse the rotation direction using the Acorn software, but I can never stop it from rotating. If I unplug the DB25 cable, the servo does stop rotating, so it appears that the problem exits in Acorn. I double checked by wiring of the DB25 cable and it appears to be correct. I am using a single OUT5 from the relay board set to Rev to control the direction and this does appear to work. I did put a voltmeter across the H8 pins and I am reading about 0.5 volts with no input from Acorn - should this voltage reading be zero?

I have seen a number of posts on the problem of wiring the DMM servos as a spindle motor, but most of those posts were back in 2020 on the 75 w servos which many felt would be underpowered. Has anyone come up with any suggestions on how to resolve this issue and get the 1.8 KW servo operating as a spindle motor. Or should I just give up and invest in a VFD controlled spindle motor?

Thanks for your input.

[suntravel]

For a Servo in Speed mode I use the VFDEnable output, so the servo is only enabled when M3 or M4 is active.
If not enabled it will not turn.

If it turns with M3 S0 the servo should have a parameter for 0 voltage shift.

A servo is IMHO the best choice as a spindle drive...

Uwe