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Vertical X-axis Belt Mount with Built-in Tensioner

by MishaT, published

Vertical X-axis Belt Mount with Built-in Tensioner by MishaT Jan 10, 2013

Description

Vertical X-axis belt tie down for PBC linear slide on MendelMax 1.5. This version does not require the use of cable ties or large screw down clamps and includes a built-in belt tensioner.

Grooves in the mount are designed to tightly trap the standard GT2 2mm pitch 6mm wide timing belts used on the MendelMax. The grooves are designed to be tight and you might have to push the belt in with a small flat screw driver.

Let me know if you want the SolidWorks file, just a fair warning it is not the neatest design I have ever created and is kind of a mess.

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Instructions

Requires:

5 x 10mm M3 (Four for mounting, one for cap) 1 x 25mm M3 (For tensioner) 1 x M3 Nut 1 x M3 Acorn Nut

Print, assemble the tensioner and mount on back of X-carriage. Mount the closed end (left side) of the belt in the groove first, then loop the belt around the motor and idler and pull it tight before looping it around the acorn nut and through the bottom groove. Get it as tight as you can without over-tightening. Once the belt is in the groove you will have ~15mm of tensioning distance.

Tighten as needed and close with cap to prevent the belts from sliding out. The screw holding on the cap is not load bearing so instead of making room for a nut trap I just made the hole tight enough for the screw to cut its own thread.

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