Originally Posted by
Ricc
Hi all, I'm getting insane after this. So i have a 6040z chinese machine. The machine overall has always run decently well, however sometimes the Y axis stalled, which is indeed the axis with more torque on it as it carries the entire bridge.
Recently I have mounted a 3d printing head on the machine, and on my first big prints it is clear that the prints turn out inclined along the Y axis by a substantial amount on the order of the mm. Meaning that printing layers are shifted from their expected position the more the printing proceeds. I have made all what possible on the machine hardware side to reduce excess torque: cleaning all components up the single ball bearing, motor alignment, greasing and oiling, assembling the machine from scratch with perfect alignment. Also now there is no mandrel mounted which is normally very heavy. I am also cooling the steppers with fans. Software side also everything seems fine, the 3 motors all have the same drive model and are tuned the same. So to myself I can explain this only in one way: step loss due to electronics. Keep in mind that on 3d prints, the job is much longer and the paths too of course, so I assume that systematic step loss becomes more apparent. A slight amount of inclination seems to appear also along the X axis but much more lightly.
My machine mounts the attached TB6560 based drives and chinese breakout board. The drives are set to 1/8 microstepping. I know something about electronics but stepper drivers and breakouts are tad complex for me. Steppers are nema23 57BYGH76, 3A, 1,5Nm holding torque.
Anyone had a similar problem(step loss and occasional stalling) and know how to fix it?