Re: Clearpath servo size recommendations for G0704
The Clear Paths are not like normal servos. They have high low speed torque and somewhat poor high speed power, much like a stepper.
This is good power to direct drive a 5 TPI ball screw. I generally don't like to tell people what to use if I have not used the part but I have done a fair amount of work with the smaller PM-25 size mills.
The 492 oz should be fine for the X and Y and the 620 will work fine for the Z.
Many people have done 425 oz steppers with the PM-25 mill and been just fine. As you know that means they can never use more then 425 oz or they will loose steps. All steppers loos power as the RPM goes up so at rapid speed of lets say 130 IPM the some what high inductance 425 oz stepper will be making about 150 oz.
Having 4 times that much power should be enough.
youtube videos of the G0704 under the name arizonavideo99