On Tuesday 18 August 2020 15:16:07 Jon Elson wrote: > On 08/18/2020 12:13 PM, 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. > > Usually, the braking resistors are handled automatically by > the drive, when it senses the DC bus voltage rising. You > usually have to tell it that a braking resistor is > available, and to use dynamic braking when needed (as > opposed to DC injection braking). Most of the other > settings are for conditions like speed ramp down when the > forward or reverse command go away. In the case of rigid > tapping, the analog speed command should be ramped down > smoothly by LinuxCNC and then the forward/reverse command > switched when the analog speed command is near zero. > > Jon
And if you do it right, its way faster at getting the reversal underway. My overshoot from the instant motion issues the reverse, Or fwd, the treatment is the same, with a 40 lb 8" 4 jaw chuck mounted, and turning 100 rpm, is about .24 seconds until the encoder says the new direction is now in effect. And the tach returns to the 100 mark turning the other way in about that same additional time. Thats pretty good time for a vfd controlled 1 hp motor. > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users 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
