I just picked up a Vicon 9000 and am trying to get it running. It has Anaheim Automation 34D106S steppers to drive the cutter that rests on a disc. I don't think it has any other height control.
The thermal dynamics PAK 5XR looks like it will tolerate some slop though. The HP computer system seems to come up but besides being archaic it is very old. The Thermo Dynamics people have been very helpful. I haven't had a chance to check with Vicon but I'm afraid they will have to pull someone out of retirement to answer my questions.
Any info on either unit would be appreciated.