Greeting all; As told, I switched out a 1600 oz/in nema 34 motor in favor of one of the new 3 phase 3NM motors on the z axis.
That meat I had to replace the DM860's psu with a lower voltage one because the 3 phase driver is only rated for 50 volts max and the toroid kludge I had in there was making a non-adjustable 63 volts. But the shape of the 48volt, 7,5 amp switcher also displaced the 42 volt toroid kludge driving the X axis's DM542. So two of the48 volt, 7.5 amp supplies wre installed, after turning them down to 42.5 volts. The additional current and stiff voltage upped the max speeds of both axis and I just tested both at 120 ipm, nominally double the former Z speed and 4x the former X stall speed. The lathe pawn makes a good exercise code, and I've modified it to make 50 copies in the air in front of the chuck. But the DM542 driving the X motor is now occasionally faulting. Seems to occur as I'm removing my finger from the jog key. The motor is not stalling but just coasts to a stop because the power is turned off at the fault point. I am using an extra microsecond for pulse widths, is it possible to confuse a DM542 with wide pulses when the switch rate is about the limit of the DM542's opto's? Pulling the max jog back to 90 ipm seems to stop that failure. Unforch, the DM542 has no external fault tally reporting connections. Ideas? Or just limit it to what it can do, 100% of the time? This is a bunch faster than it was before. Thanks everybody. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
