> > How do you program these once you get the c axis config working
Hi Andrew, I mostly plan to use this with external offsets but if some work requires it I might use the spindle as C axis. I guess I'll use Cam software that runs on Solidworks since that's what I'm used to. Never programmed 4th axis operations yet so I have to experiment yet. One thing I need to experiment using it with external offsets is the limitation of the RPMs based on the amount of movement the eoffset is requesting. I think the trajectory planner should allow for an option of reducing the RPMs automatically. So instead of only limiting the offset applied one can keep the original geometry but reduce the RPMs of the spindle to allow for the axis or axes to keep up with the requested movement. In machines without live tooling this is impractical but I find it really useful for grinding or live tooling operations. I guess it's going to be easy to implement with HAL anyway, and having the original behaviour of the eoffset is good for safety reasons. So as long as I reduce the RPMs to not exceed my X axis capabilities the shape should be accurate enough. El vie, 2 ago 2024 a las 18:38, andrew beck (<andrewbeck0...@gmail.com>) escribió: > Leonardo > > How do you program these once you get the c axis config working > > On Sat, 3 Aug 2024, 04:26 Leonardo Marsaglia, <ldmarsag...@gmail.com> > wrote: > > > Hello Gene, I hope you're doing well! > > > > Here is a little footage of the fastest I've moved the X axis on the > mazak: > > https://youtube.com/shorts/fx6Elmy2GB4?si=oYQ7x1yheyhZOh5- > > > > Being almost a square and considering the circunscribed diameter is about > > 37 mm is pretty good. For the X axis I have a max speed of 500.0 mm/sec > and > > 10000.0 mm/sec^2 of max acceleration. I kind of have to correct the jerk > > for this axis because for some shapes I can notice it's a little too > much. > > But for the most part I'm ok with the way it works. > > > > > > > > > I have done that, but the spindle speed is suprisingly slow if X is > slow. > > > > > > > Well, I'm designing this machine to have a slight better response than > the > > Mazak, but also being a grinding machine I don't really need that much > RPMs > > on the part spindle so for the majority of parts we make it will be ok. > > I'll be posting videos as soon as the machine is ready! > > > > > > > > El vie, 2 ago 2024 a las 12:55, gene heskett (<ghesk...@shentel.net>) > > escribió: > > > > > On 8/2/24 10:52, gene heskett wrote: > > > > On 8/2/24 05:45, Leonardo Marsaglia wrote: > > > >>> > > > >>> So this would also work for a mill that has an AC Servo running > > > >>> step/dir. > > > >>> Once the motor is connected to the spindle with a toothed belt > > > >>> rather than > > > >>> V belt. > > > > > > > > I must be missing some context here. I have been feeding back for > > > > spindle speed control, an encoder generated ABX set of quadrature > > > > signals generated by ats-667's which are watching the spindle > backgear > > > > teeth go by, for about a decade. What has the presence or absence > of a > > > > v-belt in the path got to do with it?. > > > >>> Cool! > > > >>> > > > >> > > > >> I have the same doubt about the kind of belt I should use. In > theory, > > > >> several V belts well tensioned should work perfectly without > slipping > > > and > > > >> the encoder on the spindle (this one of course coupled with a timing > > > >> belt) > > > >> should be able to keep up with the position and nothing should go > > wrong. > > > >> The lathes we have all work this way and I have never experienced > belt > > > >> slipping. But for some reason I feel more confident using timing > belts > > > >> all > > > >> the way. I don't know if this is an overkill and I should go with > the > > > >> simpler V belts. Remember that this machine is going to be grinding > > cams > > > >> and eccentrics. > > > >> > > > I have done that, but the spindle speed is suprisingly slow if X is > slow. > > > > > > >> El vie, 2 ago 2024 a las 6:33, Leonardo Marsaglia > > > >> (<ldmarsag...@gmail.com>) > > > >> escribió: > > > >> > > > >>> Thanks Andy for the link! Now it's time to play a little bit with > the > > > >>> config and make it work :) > > > >>> > > > >>> El dom, 28 jul 2024 a las 6:21, andy pugh (<bodge...@gmail.com>) > > > >>> escribió: > > > >>> > > > >>>> On Sat, 27 Jul 2024 at 18:41, Leonardo Marsaglia > > > >>>> <ldmarsag...@gmail.com> > > > >>>> wrote: > > > >>>> > > > >>>>> For this, I think I read there's a caxis.comp module that If I'm > > not > > > >>>>> mistaken Andy wrote. > > > >>>>> > > > >>>>> Is there a place to get that file? Because I couldn't find it > yet. > > > >>>> > > > >>>> > > > >>>> > > > > > > https://forum.linuxcnc.org/10-advanced-configuration/42171-spindle-step-dir-servo-ramp-down-before-stop-on-m-stop-command?start=120#209694 > > > >>>> > > > >>>> > > > >>>> -- > > > >>>> atp > > > >>>> "A motorcycle is a bicycle with a pandemonium attachment and is > > > >>>> designed for the especial use of mechanical geniuses, daredevils > and > > > >>>> lunatics." > > > >>>> — George Fitch, Atlanta Constitution Newspaper, 1912 > > > >>>> > > > >>>> > > > >>>> _______________________________________________ > > > >>>> 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, CET. > > > > > > Cheers, Gene Heskett, CET. > > > -- > > > "There are four boxes to be used in defense of liberty: > > > soap, ballot, jury, and ammo. Please use in that order." > > > -Ed Howdershelt (Author, 1940) > > > If we desire respect for the law, we must first make the law > respectable. > > > - Louis D. Brandeis > > > > > > > > > > > > _______________________________________________ > > > 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 > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
