Alfred Smart wrote: > I have 1980 vintage wells index knee mill, > I have retro to emc2 from bandit using gecko's microstep 10x > using original power supply 45vdc and 2 original motors and one that > is newer but came with the machine.
This is probably a bit low for older steppers with geckos. > 2 sigma instruments and one rapidsyn dana, all are nema 42 > The sigma's have no spec's and I can't uncover the spec's, and the > rapidsyn rate the amps at 7.5. > The gecko's are running wide open 7 amps, unipoler motors wired half > winding. Are you sure those are unipolar motors? The geckos are bipolar drives, and I don't see how they could work with unipolar motors. > the sigma motor's seem tired and don't have much detent at all and > rapidsyn has plenty. If you disconnect the motors and short the windings (separately, not to each other), can you feel the detents more? > When I run a program like the spiral.nrg the sigma motor will stall in > the change of direction part of the interpolation. > It doesn't seem to stall when jogging at slow speed or rapid motion. > max_volosity .65 > max_acceleration 3.0 > could these motor's need more current or are they used up > There is some talk about repair, anyone with any experience with this ave. > Wells quoted me $495. for used motors, I think I'll look elsewhere. You should be able to find reasonable motors on eBay or elsewhere. A modern NEMA-34 motor can probably provide as much power as the older NEMA42 could. (I'm assuming you have round motors, not the newer square ones) > Wondering what the people on the list think? > Thanks again Al Hope this helps (a little) - Steve ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
