Greetings.
I've been on this list for a couple weeks now and thought I should give an
intro. First, I gotta say this list is really exiting - I can't believe how
much 'good stuff' has come through in the short time I've been on.

I'm working on a CNC mill project. It's one of those Taiwanese
mill/drill's. I have 300 oz/in steppers mounted and geared 2:1 to the ACME
screws via tooth belts. I think I'll need to do some work to reduce
friction, I'll probly need to install ball screws. Has anyone ever tried
Teflon bearing engine oil additives i.e. 'slick 50' for lubricating the
slides?

I'm working on a chopper drive for the motors. I have a prototype up and
running. So far I've got the current up to 3 amps/phase. With two phases
energized it's drawing less than 500ma from my 40 volt supply. It's
designed to go up to 5 amps but I'm stopped here till I get some instability
issues worked out. It seems to have some problems at certain motor speeds -
I believe it's caused by the physical resonance of the motor armature.

I have an eval copy of cncpro I'm using to get things running. The EMC
stuff looks real good too though. I installed Linux on a computer to play
with - not sure what to think about it yet - still trying to get the RT
kernel installed.

Joel Jacobs
(Central Ohio USA)