On Thursday 07 May 2020 19:43:20 Dan Henderson wrote: > I should have mentioned, I’m in the process of building a reverse > polarity circuit to trip polarity by issuing a CCW M4 via a 5v output. > My motor controller doesn’t natively support CCW. > > I entered the code and it made it all the way down until the spindle > stopped. No reverse so it stayed there. > If doing a reverse with a heavy relay in the output of that cm1200, I don't think it will like that and will trip off, or worse. The safest would be to stop it, then reverse the relay, and then bring it back up to speed. Since thats not a 4 quadrant drive, you may have to rattle another relay to switch on a big braking resistor to do the stopping.
On Thu, May 7, 2020 at 6:36 PM Dan Henderson <luvtof...@gmail.com> wrote: > > Thanks Jon. My max jog speed is 54 IPM so I should be good to give > > that a try. Thanks for the test code! > > > > On Thu, May 7, 2020 at 6:16 PM John Dammeyer > > <jo...@autoartisans.com> > > > > wrote: > >> > -----Original Message----- > >> > From: Jon Elson [mailto:el...@pico-systems.com] > >> > Sent: May-07-20 3:54 PM > >> > To: Enhanced Machine Controller (EMC) > >> > Subject: Re: [Emc-users] Sourced from: Re: Fluctuating RPM using > >> > CUI > >> > >> ATM 10 encoder > >> > >> > On 05/07/2020 12:23 PM, Dan Henderson wrote: > >> > > Is there a simple test code I can run to confirm ridged tapping > >> > > is > >> > >> working > >> > >> > > or even the feed rate is synchronized to the encoder feedback? > >> > >> Without, > >> > >> > > spindle-at-speed enabled I�ve no way to visually confirm this. > >> > > >> > Just try these lines and see what it does, with the Z clear > >> > to move down to Z-1 without hitting anything : > >> > M03 S500 > >> > G01 F10 Z0.5 > >> > G33.1 Z-0.55 K0.025 > >> > > >> > If it stalls with the spindle running, it never saw the > >> > spindle encoder trip the index-enable to off. > >> > If it moves down in Z, then reverses the spindle and pulls > >> > back in Z, then it is all working. > >> > That will give a 40 TPI thread (assuming inch units). > >> > >> 500 RPM is 8.3333 RPS = 0.12 turns/second. > >> Threading a 40 turns/inch hole means 0.12 inches/second or > >> 12.5inches/minute. > >> So you also have to make sure that your Z axis can move that > >> quickly. John Dammeyer > >> > >> > Jon > >> > > >> > > >> > > >> > _______________________________________________ > >> > 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 > > _______________________________________________ > 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
