Mechanical Belt Tightener for Mostly Printed CNC

thingiverse

Addon for Mostly Printed CNC and Mostly Printed CNC, International Edition! For those who don't want to use only zipties for the belts can use this thing. You need to print two left and two right ones. You need four M4x20 bolts, four M4 nuts, eight M5 bolts with a hook and eight M5 nuts. The thing (blue) is just put over the existing corner block (white) and fixed by the M4 screw. No need to change anything else on your CNC. Be careful when you tighten the belts! Tighten them a bit and try out the moving of your x and y axis. These belts normally don't stretch, so as soon as your axis work fine you don't need to tighten anymore. I tested it using a corner block from the international edition, but it should also fit on the "normal" version of the CNC/MultiTool. Update 2015-05-30: Version 0.2 Height of the upper bold-mount was increased by 15mm so it now has the same height as the original zip tie hole. I changed it just to be sure there's no downforce when the roller_f is close to the corner block.