[ZipSnipe]

I,m looking at purchasing an old minitech cnc machine and I noticed that the stepper motors are only 35oz, 5v,1amp,2oo per rev. Is this any good? And me being a newbie what exactly does ounce mean would that be similar to torque?

[widgitmaster]

It is actually its 35 oz/in as in ounce/inches of torque.
That is the same as 0.18228 lbs/foot torque

http://www.merkle-korff.com/formulas.asp#con

35 is a light duty stepper, but thats not saying much without knowing how it is being applied or used!

Hope this helps,
Eric

[ZipSnipe]

Thanx eric, I want to mill small heat sinks for pc's out of copper 2x2x3/8 work piece. Think I need to upgrade these motors?

[widgitmaster]

Copper is a gummy metal, it has a tendency to make the cutter grab and run!
A light torque on the axis would limit you to multiple light cuts! Deeper cuts require a stronger stepper motor to keep the cutter on location!
I would suggest a 200+ oz/in stepper, usually a NEMA-23 frame sized motor, but you did not specify the exsisting motor's frame size! If you are using NEMA-17 motors, I don't know the largest torque in that frame size!

Sounds like a fun project, have fun!
Eric

[ZipSnipe]

Oh the motor well it has a dremel holder which I had plan to make a bracket for new motor and spindel. Yeah I figured 200 oz would be the size I would go with. Thanx again. May the Machine Gods smile upon you :-)