Gene Heskett <gene.hesk...@...> writes: Snip
> So have I, but something like that is the exception to the rule. The motors > torque was exceeded, yes, but it wasn't moving that fast so it could keep on > running. To me that would be a sign telling me I needed bigger motors and > drivers. While a bridgeport can be moved with small motors like I use, when > handling the size of a bridgeport tables weight, I'd want nema 34 motors and > 80 volt drives as absolute minimums. My x table only weighs maybe 20 pounds, > the bridgepoort closer to 200. Gene, What I was thinking about was using steppers to reliably power big iron on the Bridgeport scale. Kelinginc.net sells big steppers (nema 34, 1800 oz) for $180. If you add an encoder and a G203V 80 volt/20 amp drive you are under $400 per axis. That is a pretty attractive price and makes retrofitting old Faunic based machines with their screwy AMP's with resolver feedback instead of tachs a whole lot more reasonable. A stepper based conversion would not have the performance of a servo system but could still be useful in a home shop. I don't have a machine in mind... just thinking. Roger ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
