Anycubic I3 Mega Belt Tensioner

thingiverse

You'll need: -one 12mm diameter pulley with a 3mm diameter bore bearing for GT2 timing belt, width 6mm, -one M3 nut, -one screw, M3 x 16mm, -two screws, M3 x 8mm, -three M3 washers. Put the nut into its designated hole. Next, place two of the M3 washers on top of the 16mm screw and one below it, then screw the assembly into the nut until secure. Be cautious not to over-tighten or the bearing won't rotate properly. Remove the screws from the stepper motor. Place the assembled pulley in its designated position and secure it using the two M3 x 8mm screws. Adjust the belt tension as desired and lock the screws in place. Freecad sources are included.