On Thu, 3 Nov 2022 at 09:23, andrew beck <andrewbeck0...@gmail.com> wrote:
> > looking for a way to set the index pulse high on the mesa card input before > triggering a m19 for tool change as a safety check > The mesa index is a physical pin, so you would need to route out via a GPIO But I don't understand your analysis of the problem, or the proposed fix. If you just want to zero the encoder at a random point (which is what toggling the index at a random point would do, if it did anything) then you can do that via HAL. Is it possible that the problem is that the spindle is simply not "homed" sometimes? ie it has not yet passed through index with the index-enable set, so the encoder counts are not aligned to the index mark? In that case your tool change could run an explicit homing cycle prior to toolchange. M64 P04 ; set index-enable G4 P0.1 M65 P04 ; toggle the tristate back M3 S100 ; spin the spindle briefly G4 P1 ; wait for at least one full rev M19 P0 ; carry on. As the index-enable is a bidirectional pin a bit of HAL is needed, using the tristate-bit component. That should be set up with the in-pin permanently high and the enable connected to motion.digital-out-NN (NN = 04 in the example above) -- 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
