Jon Elson <el...@...> writes: > Oh oh! ... > > The Excellon drive may have had one motor pole grounded, and that may be > tied to frame ground. Certainly not a great scheme, but they all seem > to use 3-wire cables. I know my motor is completely floating, but that > doesn't necessarily apply to any other unit.
Hi Jon, This is an Excellon quiet drill 1010. It has four motor leads, one of which is connected to the motor housing (I assume it is gnd). I checked the motor phase leads after my "incident" and all had matching impedances and none were shorted to ground. I did not hook the 4th ground lead to the vfd gnd, my bad :-( BTW, I am using a Danfoss vfd to power the Excellon spindle with very good results. The Dandfoss has an upper frequency limit of 1000Hz, which is not as high as an Excellon drive, but works well for the money. Tom ------------------------------------------------------------------------------ Check out the new SourceForge.net Marketplace. It is the best place to buy or sell services for just about anything Open Source. http://p.sf.net/sfu/Xq1LFB _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
