Due to the lack of an M3 die that actually cuts a thread, and the fact that none of the places that sell dies on a bank holiday sell dies of a quality that I feel like buying, I spent today trying to make my lathe home without moving. (with a complicated setup on the lathe, maybe including a steady-rest, this can be a good feature)
The idea is that by saving the machine position to file I can then use the absolute single-turn resolver position for fine-position determination and the saved position to work out how many full turns need to be added to that. Adding the resolver position to the full-turns position gives me a value that I can pass to motor-pos-fb (and, it turns out, pid.fb) such that when the "home" button is pressed with HOME_ABSOLUTE_ENCODER = 2 set in the INI (a new feature, thanks Dewey) the machine adopts the current position as the true position. I do this with a user-space python component (as it needs file system access) and it writes its own little file. I am trying to determine if I can use the existing position.txt file. The file itself is ideal, my file ends up with exactly the same data, but I think that if that file exists then the values are copied directly into joint.N.motor-offset and that isn't _quite_ what I need. -- 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, 1916 ------------------------------------------------------------------------------ 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
