Thing-o-matic belt tension clips how to

thingiverse

These additional belt tensioning clips keep the belts even more straight and you can see the actual tension on the belt. To add those to a Thing-o-matic: Sand out the original holes where the moving side of the belt goes through/Optionally laser the square bigger - for laser you find the modified templates of the thing-o-matic here. THE MOST IMPORTANT THING FOR THIS TO WORK is to level the belt, so that it is straight. In the original TOM the plastic-Timing-Belt-Pulley-wheel could go up and down along a screw. Avoid this up and down by levelling the plastic-wheel with shims underneath and above. For proper tensioning a motor-belt-tensioner is needed on the opposite side like this one: http://www.thingiverse.com/thing:305766