For anyone interested in trying this out, I have fixes / improvements in this branch now:
https://github.com/robEllenberg/linuxcnc-mirror/tree/feature/spindle-sync-overhaul-2.7-rebase - Less intrusive warning messages if the spindle is too fast - Spindle RPM limit calculation should work properly now - Improved (again) algorithm for position tracking that should have even less acceleration ripple. Best, Rob On Thu, Jan 26, 2017 at 3:10 AM John Morris <j...@zultron.com> wrote: > > On 01/23/2017 12:05 PM, John Kasunich wrote: > > If you run a program with G33 moves in it and the spindle isn't > > turning, the program will silently hang waiting for index. > > Additionally, a G33 move will wait for the spindle-at-speed pin. (See > below) > > > The run-time check sould of course use the actual spindle speed from > > the encoder. If you don't have an encoder you can't do G33 anyway. > >[...] > > > > On Mon, Jan 23, 2017, at 12:18 PM, Robert Ellenberg wrote: > >> Is there an INI or HAL setting to tell LinuxCNC that the spindle > >> ismanually controlled? > > > > Not that I'm aware of. > > Of course an INI setting could be added to specify whether the spindle > is under LCNC control, but even without this, Rob's spindle-scaling > scheme should still work. If a fixed-speed spindle runs at 2000 RPM but > axis constraints limit max spindle speed to 1000 RPM, the program should > pause indefinitely waiting for the spindle-at-speed pin. > > This behavior could be puzzling: the spindle is turning, but axes never > move, why? This might be addressed with a "spindle not coming to speed" > warning following some timeout. > > If that makes sense, then here's one way to specify the checks: > > - Preview-time check: > - Input: S value > - Applicability: any machine > - Fixed-speed spindles: operator must program S to benefit fm check > - Failure action: raise warning > > - Run-time check: > - Input: spindle encoder output > - Applicability: any machine with spindle encoder > - No spindle encoder: hang waiting for index; see next > - Failure action: scale spindle speed > - After timeout on index/spindle-at-speed pins, raise warning > > John > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
