The drive is fairly big and open framed. The open frame drive will require an electronics / electrical enclosure suitably sized. This is an additional expense. Ideally you want a big enough enclosure to contain all of the machines electrics.I would love to go with a brushless motor but they cost too much so I'm probably going to pick up a 1 to 1.5hp three phase motor and VFD. I found this one for sale locally on Craig's list, what do you think?
I mention this because the drive looks physically large. As far as the manufacture goes they have made good product in the past.
I don't have time today to look into the specs. You do need to make sure it is a proper match to the motor.Here is the spec sheet on the VFD. I'm still trying to find specs for the motor but I think its only 1715 rpm from what I can read on the motor plate.
A 1715 (odd value ) RPM motor is probably a good thing. That should be a 4 pole motor which helps with torque at lower speeds. The motor should be capable of at least 3400 RPM and probably a bit over that. You should look for maximum rotor speed spec. The flip side here is that you can't achieve the higher speeds unless the drive is capable of operating beyond a 120 HZ. Most drives can easily go up to 120 HZ but you need to verify that as older drives may have limitations.
You should be able to get really good performance out of this motor and drive from 800 to 3400 RPM and probably well below 800 RPM.
Let me know any thoughts as I would be purchasing it in the next day or two! Thanks!
If you have the motors specs, especially its frame size, get out the drawing tools and mock up a paper / cardboard flange and see how it fits on the mill. Physical space is the number one reason for dismissing a 3 phrase motor upgrade. If you can't fit the motor in place obvious this would be a bad buy.