I know motor selection has probably been beat to death, but I’m new to servos, so here goes.

The following is what I know about factory ac servos on the mill that I have.

Apparently reusing them is a pipe dream even with replacement encoders.

Now what parameters do I need to match or slightly exceed to get a decent sized motor.

I know with steppers the stall torque is a good place to start, but I don’t know enough about servos to be dangerous.

So please help me understand what I need to be looking at to get servos that will move this mill well.

Thanks
Duke


X-Y axis
HA40CS
Rated Torque
30.0 kg/cm at stall (2687 oz.in.)
27.2 kg/cm at 1000 RPM
24.4 kg/cm at 2000 RPM
Max. RPM 2000
Weight 8 kg

Z axis
HA80CS
Rated Torque
60.0 kg/cm at stall (5375 oz.in.)
54.4 kg/cm at 1000 RPM
48.7 kg/cm at 2000 RPM
Max. RPM 2000
Weight 12kg

Motor HA40CS 3Phase
Input in 100% (kVA) 1.0
Input in 100% at 170V 3.4

Motor HA80CS 3 Phase
Input in 100% (kVA) 1.6
Input in 100% at 170V 5.4