Andrew, Is a geared head? If so what are the ratios? On Sunday, April 25, 2021, 6:30:19 AM CDT, andrew beck <andrewbeck0...@gmail.com> wrote: hey guys
not sure if my emails are coming through to you guys. hope they are. i have just successfully set up my encoder for rigid tapping using index signal from spindle motor encoder just got a few questions for the group is it possible to set different ramp values depending on spindle speed. if I try rigid tap at 1000 rpm at 1mm pitch i get a over travel of about 5mm. I can reduce the deceleration ramp in the altivar 71 schiender drive to 0.5 secs and then the over travel is about one revolution of the spindle. but if i leave the settings in vfd like that and then run spindle at 9000rpm the spindle goes into overvoltage faults. just wondering if I can maybe set use the ramp internally to linuxcnc to give me more control http://linuxcnc.org/docs/html/examples/spindle.html if i could specify a max rate of change and also a max ramp setting I think I could set the values up so that at high speed the max rate of change slows the spindle slowly enough that it doesn't trip vfd. while at low speed say under 1000 rpm the spindle can stop faster. or maybe I am just miss reading this all regards Andrew _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users