That is a really old Partner 1. Call or e-mail Milltronics Service Dept. with the serial number, they can tell you what's in the service file.

That style toolchanger can have alignment and prox switch issues. Have it do lots of tool changes with the carousel fully loaded to check it out.

It has small linear rails and bearing blocks and small diameter ballscrews that are usually lubricated with a grease gun, sometimes not too frequently. Run it around with jog, the handwheel, and with MDI commands to observe the motion. Listen for noises and smoothness. I'd check backlash in several places to look for wear in the screw and the thrust bearings.

The motors may be full of carbon dust from worn brushes, you may have to remove the end caps to look at the tach plate and pull the armature brushes to check them.

Run the spindle, many RPMs, all over-ride switch positions, CW and CCW, how does it sound? Spindles can be rebuilt but bearings can get expensive. How does it grip toolholders? Belleville washers do relax and break, but are easily replaced.

The home-switches and over-travel switches wiring, and often the axis wiring can have problems with coolant and chips, pull the covers back and inspect.

Without more information about electronics updates/upgrades, it is difficult to tell you what to check. The computer may still use cat900 motherboard and the 1st gen Acroloop cards, neither of which are replacable with new cards. The drive cards will probably be Westamps or Fenners, but they can usually be repaired. Power supplies are also available or repairable.

Most of the relays, solenoids, etc., are standard items commonly available.


Bottom line - look it over, drive it, run some programs, test it out. Don't spend a lot.