MPCNC Double Belt

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Update: After using my MPCNC with the double belt for over one year, the glued belt started to detach from the angle iron. I used this opportunity to switch to a single belt design. I haven‘t noticed any difference so far, except that finding the right belt tension is easier with a single belt.

Maybe machines with a longer belt length will benefit more from the double belt. But as long as you don’t feel adventurous, I would suggest to stick with the original MPCNC for simplicity.

If you installed the double belt and want to switch to a single belt as well, you can find a drop-in replacement for the belt tensioner here: https://www.thingiverse.com/thing:3875362

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This thing is WIP and there are currently no building instructions! The parts are for the 25mm version of the MPCNC.

By interlocking a belt with a second belt it is possible to reduce the length of the tensioned belt and therefore reduce stretching. The parts were designed for a