Prusa i2 Y Axis belt tensioner - No disassembly required

by blitz2190, published

Prusa i2 Y Axis belt tensioner - No disassembly required by blitz2190 Apr 15, 2013
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I couldn't quite find a belt tensioner i liked that didn't rquire dissasembly so i made one I also included the cad files


used all sae parts easily found a lowes in the hardware aisle in the green machine screw boxes of hundred.

1 x 6-32 X 1-1/4"
1 x 6-32 machine nut - this i important to get the box of hundred with green label as these nuts are half the size of the ones in the bins

2 x 6-32 1/4"
1 x 608 skate bearing- found at any skate shop, usually also a ski or snow board shop

print one of each and assemble

loosen the nuts on the idler bearing slide between the fender washers and nuts(mine isn't beacuse i didn't have a belt guide at the time and liked a little play as it didnt bind) re-tighten nuts and tighten belt to liking

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After download, the Axises seem to be off and I'm not sure how to change the original files as Sketchup wont open an igs file anyway to post a file to modify or change the axises?

I printed this thing.. Doesn't work as is. I'll try to fix it, as I like the idea.
The bearing shaft is not adequatly supported, and the bearing binds on the outer race.

i printed at .2 layer height 20% infill with .4 nozzle and it worked
awesome, i had planed to add another plate to cover the bearing but
found there was no need as it was a tight enough fit

there should be about .5 mm clearance around the bearing so the printer needs to be some what accurate as the closer i could get it the stronger it seemed to be