Malyan M180 Y--axis belt tensioner

thingiverse

When printing with my M180, I discovered that the y-axis wasn't steady. This was evident on the test cube 20x20 and when printing a round wall with only two extrusions. In the cube case, the corners were not correct - a notch appeared on two opposite corners. In the round wall case, one could see a separation of the extrusions on two opposite locations, where the y-axis changed direction. When the printer does extrusion clockwise and counterclockwise, this issue is very clear. The problem causing this instability is not enough tension on the y-axis belt. On my printer, I was unable to create sufficient tension by sliding the stepper motor down. Therefore, a solution had to be devised to increase the tension. The result is a wheel with GT2 teeth that rides in the middle of the belt, thereby increasing the tension on the belt. I have provided one 34 and one 36 teeth wheel. To mount the wheel, you will need to loosen the stepper motor and insert the wheel. When tension is applied to the belt, it will stay in the location where you placed it. Print Settings Printer Brand: Robo 3D Printer: R1 ABS + PLA Model Rafts: No Supports: No Resolution: High Infill: 40%