Mini-Mendel belt extension clip

by Erik, published

Mini-Mendel belt extension clip by Erik Aug 13, 2010

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This clip allows you to use a shorter piece of belt. My belt was too short after the pulley extender upgrade to the Mini-Mendel. The STL extends it by 40 mm or 50 mm. The OpenSCAD file is parametric so you can generate it at any length you want.


Use a tie-ribbon to intermesh the teeth of the timing belt (an example is in the pictures).

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Bre Pettis


Mini-Mendel belt extension clip by Erik is licensed under the GNU - GPL license.

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That is a beautiful mini! I love the yellow/black combo!

Erik - in reply to bre

I've replaced some of the quick'n'dirty hacks I did at NYCR to get it working. In the process it's becoming more yellow/black. For now it's gonna be single material again. The monolithical proprietary BfB electronics: "they'll just have to go..." (HHGTHG ref.) Better to have a stable single material demo machine that works than a non-working demo machine. Plus, dual-head restricted the X-travel too much. I'll get multi-material running on one of my Darwins, enough place for another toolhead or two.

Good idea for making up for the need for a longer belt with the extenders. I just have one end clamped normally, and I have loops on both ends like yours, but I have a third zip tie going through both loops to to bridge the gap. This way, if they belt gets slack, I can just tighten the the third tie.

Oh, and your carriage is backwards. With the belt extenders, the orientation of the carriage matters.

Pulley extenders, I mean. They're not symmetrical, the side that sticks out further is meant to clear the 360 bearing, while the L-shaped side aligns with the belt clamps on the 180 bearing side.

Thanks for telling me about the X-carriage. I'll change it. I have to remove it anyway when I receive more ball bearings. I'm running the carriage with 2 bearings too few. It works but isn't fully constrained correctly.