CNC MILL 3
Pneumatic draw bar. The draw bar was not functioning at all. One of the valves was completely corroded, so I rebuilt it, making a new rim from brass and attaching it with Locktite. The draw bar now functions, but it leaks air badly. A gasket needs replacing, and I will renew that. But if it is still unusable, I will buy a new air draw bar.
I turned on the mill for the first time today.
It booted up, and self tested OK. The servo motors and spindle work fine, and smoothly. The axes move up to 4000mm per minute. The spindle runs quietly up to 4000rpm. (not immediately. I ran it for 10 minutes at a low speed as per the instructions). There seems to be some limits to the travel on the X and Z axes, not related to the hard limits. There must be some soft limits set incorrectly.
All of the ways were dry. There is an automatic oiler, with plenty of oil in the reservoir. I used an oil can to lube all of the ways and the ball screws, because I am not sure if the auto oiler is functioning. It is meant to operate on startup, and then every 30 minutes. Another item to check.
This mill is an Extron, with 1000mm travel on the X axis, and approx 500mm on the Y and Z axes. It is big (for me) heavy and smooth. I expected that it would need some attention because it has not been used in years. So far the revealed problems have been with the peripheral items and cosmetics, and not the major components or the electronics. So far so good. I will post some pics soon.