I think most "good" VFDs can do that automatically. ----- Original Message ----- From: "Gene Heskett" <[email protected]> To: [email protected] Sent: Thursday, June 22, 2017 10:23:08 PM Subject: Re: [Emc-users] spindle-at-speed being ignored
On Thursday 22 June 2017 20:59:22 Gene Heskett wrote: > Greetings everybody; > > This same file ran on TLM just fine about 8 months back as I was > making x drive parts for this Sheldon. > > But on the Sheldon, it pauses at the beginning of the g33.1 motion as > if its waiting on motion.spindle-at-speed to go true, when in fact its > been true all along. > > So my question then is, does motion.spindle-at-speed need an initial > false input to "arm" its sensitivity to getting z motion started when > it does go true? > And before someone asks, yes, encoder.00.position is hooked to motion.spindle-revs, and I can see it marching along with a halmeter as the spindle turns. The near module I used is set quite broad because the motion.spindle.rps signal bears little relationship to the actual speed because of the wide range of output speeds available with an 8 speed gearshift between the motor and the spindle. That is yet another problem that needs sorted, as I'd like to develop a slowdown if the motors phase slip angle gets too high because of a heavy load and too high a frequency from the vfd since the torque does a vanishing act when the frequency is above 120Hz with this motor. Coil amperage falls off a cliff due to winding inductance then. > Thanks folks. > > Cheers, Gene Heskett 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) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
