On 1/3/2016 8:00 AM, Cecil Thomas wrote: <clip> > As I have designed my program there are many more moves in one > direction than in the other so I assume that the "shortness" > accumulates over a large number of moves. My calculations for the > accumulation of error in my system seem to match the measured > results. I can change my program to try to balance the forward and > back moves or I can add a stage of reduction to the A axis to reduce > the magnitude of the "leftovers" or both but before I proceed I would > like to be sure that the trajectory planner does as I assumed "Only > round down".
For a test, can you change it to make one pass, rotate the gear 1/4 turn (or some other fraction of a turn) and make a pass, then rotate back to the start plus one tooth. Make that pass then rotate 1/2 turn the other way plus one tooth. Alternate back and forth like that until you've made the same number of cutting passes as you would going around one direction and check the accuracy of the gear. If it works it works and you've found a way to even out the cumulative error. If it doesn't work or it works but you end up with teeth that are too narrow or too uneven, then you still have a problem to track down. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
