John and Andrew, The motors I have are NEMA 34. I had to look that up. They are unipolar motors with ratings of 4.5 volt and 1.4 amp. That makes the motor just under 15 watts which is not a lot but I think I can double that if I run them as bipolar motors. It should not be that much harder to do.
I have an old mill drill that I want to convert. It was made by Enco. I believe. I is about 350 pounds and the table is roughly 8 x 24. It is not close and I do not remember just what the specs are. I remember playing with these motors when I got them and thought they had as much torque as I had when I was driving the table by hand. I do not think torque will be a problem and as I said, there will be a reduction in the pulley from motor to table. I plan to start out with a driver that will half step the motor. If I get that working and feel that micro stepping would be better, maybe, I will ad it later. My first concern is output port of the computer. I also have not thought of a way to control the z axis. I have not thought of an easy way to mount the motor and other hardware. Thanks for the quick reply. bill John Kasunich wrote: > You don't actually say how big your steppers are. "Husky" is not a > number... The relevant specs are current, voltage, and frame size, > roughly in that order. > > There tend to be two classes of motors (and drives) in the hobby CNC > world. Motors under 2 or 2.5 amps are usually NEMA 23 frames, and are > suitable for micro-mills and mini-mills. Micromills are the ones that > you can pick up without straining - Sherline, MaxNC, etc. Minimills are > a bit bigger, maybe 150 lbs or so. > > Motors from 3 to 7 amps are usually NEMA 34 frames, and are sized for > larger machines, like mill-drills (400-700 lb machines). Bridgeport > class machines usually use something bigger yet. > > In the "under 2.5 amp" catagory you have drives like Xylotex and others, > which normally run in the neighborhood of $30-70 per channel. When you > get up to 3-7A motors, that is Gecko or similar, at $100-200 per channel. > > Tell us what class of machine and motors you have, and I'm sure more > suggestions will be forthcoming. > > Regards, > > John Kasunich > > ------------------------------------------------------------------------- > SF.Net email is sponsored by: The Future of Linux Business White Paper > from Novell. From the desktop to the data center, Linux is going > mainstream. Let it simplify your IT future. > http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > ------------------------------------------------------------------------- SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
