I bought a well loved TC22 last year and have been working my way through it. Beyond just scrubbing I went through the pneumatic, lube, electrics and fixed quite a few seals, leaks etc. Replaced pretty much everything rubber. Machine has been running quite nicely. The only minor issue I have left is that the Z axis seems to have a "rumble" to it. You can feel it in the cabinet. A vibration that is coming from the Z. I can see if it put an indicator on the head indicating the table. About a .001" shake of the needle (very fast). The posiiton indicated in the control doesn't vary. The axis position is completely stable and the movement is smooth. When jogging down the vibration goes away, and it gets a bit worse when jogging up. It varies a bit depending on position but is always there. I haven't noticed any surface finish issues from this, but I assume it will have an effect. X/Y don't have this issue, although I suppose the Z has a higher load when holding up the head. Machine is ~1998 vintage and has the larger Parvex motor.
I've been posting a bit about it on the PM forum but not a lot of interest over there: https://www.practicalmachinist.com/v...8/#post3891574
Seems there are more TC22 users hanging out here. I wondered if anyone had any ideas on this. I haven't dug too deep into this one yet.
James