I've calibrated the angle of the frame best i can. The XY motor is rated 34mm, 1.33 amps, 2.1ohm, 2.5mH, 2.3kgcm holding torque. I've adjusted the a4988 for both x and y at 0.5 (some miss step), 0.6 and 0.7. This video is taken at 0.6vref for both xy.
The 1st layer speed is 20mm/s when the shifting layer happen in the video. The motor is always much cooler than the print bed which is 58c. Previous prints, sometimes i get away with the problem until after 2-8 hours before shifting layers again. In between the shifting layering is very good and smooth. I've even switch extruder and z axis a4988 with x and y to no avail. I figure it might be the chinese knockoff mgn12h linear guide but when i move it, its ok. Well there is some binding if i exaggerated cantilever force on the linear guide. But is don see why this can cause the belt slap which ONLY happen 1 out of hundreds layers.
The belt slap]
The 1st layer speed is 20mm/s when the shifting layer happen in the video. The motor is always much cooler than the print bed which is 58c. Previous prints, sometimes i get away with the problem until after 2-8 hours before shifting layers again. In between the shifting layering is very good and smooth. I've even switch extruder and z axis a4988 with x and y to no avail. I figure it might be the chinese knockoff mgn12h linear guide but when i move it, its ok. Well there is some binding if i exaggerated cantilever force on the linear guide. But is don see why this can cause the belt slap which ONLY happen 1 out of hundreds layers.
The belt slap]