On Tuesday 18 August 2020 13:13:47 jrmitchellj wrote: > Hi Scott. > I have a Yaskawa V1000 on my spindle, and have installed a encoder on > the spindle. > Would you share what settings in the V1000 to get rigid tapping > working well? I have braking resistors installed, but don't know what > variable to change to bring them into play. > > Any help & tips always welcome! > > --J. Ray Mitchell Jr. > [email protected] > I have no idea about the Yaskawa's, J. Ray, but theres generally hints in the manuals. My stuff is all in the sub 2hp class, cheap chinese clones and resistorless, not even a place to hook it up internally. But it sports DC braking and works well enough with a 1hp motor, to reverse a 40lb chuck at 100 rpm in less than 1/4 second from hitting an m4, to actually turning the first couple degrees in reverse. And it feeds that back to the gcode so it can compensate the depth of tap to prevent breaking a tap on the bottom of the hole, if of course the tapping gcode uses that feedback. All I need to do now is fab a hole probe to measure how deep the hole is. But life and another heart attack got in the way. Check your manual, it may have some info. Or tune up the dc braking if it has any, thats very good too as its amazing how good a dummy load they can be with the FLA amps in DC thru the coils of a 50 yo 3 phase motor. Depends on the motor, this one is bog stock induction.
Synchro motors, like the 24k rpm models, should be slowed synchronously, which brings the inductance of the coils into play so the slowdown from high speeds is less effective at the higher speeds, but very effective at lower speeds where the coil inductance isn't a hindrance to applying the FLA rateing in AC drive to the coils. In either case you'll need to profile the direction change with some limit3 trickery and an mux2 + xor2 gate in your hal file. There isn't much you can't make hal do. 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
