I've been reading and attempting everything I have found. My 4th axis is working surprisingly well, but its very jerky. I'm using fusion 360 with usb smoothstepper and have tried various smoothing settings, slower feed rates and it all yields the same results. Theres a video below with some sample code.
I see lots of people with harmonic drive 4th axis and mach3 and they all seem so smooth. The pausing is adding a decent amount of machining time and leaving marks on my finish. Does anyone have any ideas what's causing the jerkiness/stuttering?
https://www.youtube.com/watch?v=Cz8HDmt4FTA
Code:Z0.6334 A-6.574 F2836.3323Z0.6395 A-9.401 F2653.4703 Z0.642 A-10.341 F7665.2579 Z0.6468 A-12.217 F3861.3871 Z0.6488 A-13.152 F7937.2541 Z0.6507 A-14.087 F7996.3277 Z0.6523 A-15.02 F8146.2995 Z0.6538 A-15.953 F8273.91 Z0.6551 A-16.884 F8360.7096 Z0.657 A-18.745 F4297.0773 Z0.6582 A-20.603 F4442.1249 Z0.6585 A-21.531 F9124.6597 Z0.6584 A-23.387 F4677.8014 Z0.6582 A-24.315 F9147.9255 Z0.657 A-26.171 F4444.8371 Z0.655 A-28.029 F4297.6506 Z0.6537 A-28.958 F8398.9712 Z0.6522 A-29.888 F8277.2542 Z0.6506 A-30.818 F8155.041 Z0.6487 A-31.75 F8035.2122 Z0.6467 A-32.682 F7924.6533 Z0.6445 A-33.616 F7856.4056 Z0.642 A-34.55 F7700.0207