Tensioner carriage Y with inverted belt for Tevo Tarantula.

If you see vertical streaks on your printout, then the thing for you. I believe that these bands occur because the belt moves the teeth along the smooth surface of the rollers. You can replace the smooth rollers on rollers with teeth. Or you can turn the belt.

UP.

If your printer has a wheel with a hole of 3 mm ( it usually is on the motor ), download the file Y-activ-L-3mm.STL