I started just checking things out on the Hurco KMB1. The shaft encoder came off with the cover on the X axis. Also, the motor is definitely bad. The shaft wobbles in the housing. I already pulled it off. I like the neat like flex coupling even if its a pain to get to. Its two seperate stacks of stainless spring flex plates. Very simple and elegant.
The shaft encoder plastic crumbled and fell apart on the Y axis also.
There appears to have never been a shaft encoder on the Z-axis. There isn't one, and I don't see a pigtail for it to plug in like on the X & Y.
Anyway, the broken motor is an Electro Craft 07 03 02 049. As near as I can tell its no longer made, but ElectroCraft has made various incarnations of this motor over the years. Anybody know what a good replacement might be? How about having a good used one (or two (spare)) laying around you would sell cheap?
P.S. I have already decided that I am going to retrofit this thing to a new controller and run it either with Mach or EMC.
P.P.S. I'll figure out what shaft encoders I want to use when I figure out what driver/controller I want to use.
P.P.P.S. Not sure about the whole air brake thing. There is a brake caliper and brake disc on the spindle, but both the spindle and the Z-Axis move manually by hand with no air and no power to the machine. Seems if it was fail secure it would be locked.