On Tue, 21 Jul 2020 at 18:46, Matthew Herd <herd.m...@gmail.com> wrote:
> When I installed the spindle encoder, I used a shaft at the top of the head. > Due to my failure to investigate more fully, it turns out that it’s geared > 1:1 with the spindle (but is not a part of the spindle). So when I go into > backgear, the encoder reads opposite direction and at a different ratio equal > to the backgear ratio (whatever that is, I’ve never bothered to determine > it). Fine for running a face mill or fly cutter, but not usable for rigid > tapping without some HAL to reverse direction and compensate for the ratio > change when in backgear). You would also need to pick up an index (but only an index) from something that does run 1:1. If you accept that you only do spindle-synched motion in back-gear then you don't need to do much in HAL. -- 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
