Cable Tie Belt Tensioner
by epengr, published
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And here I thought I had a new idea...
However, I don't find them to be springy at all.Â I'd say they have less give then the belt does and they've completely eliminated the rather huge (~0.25mm) backlash I had.
There are a lot of tempting new design revisions out there, and I'm seriously tempted to start work on a new printer.Â Mine's getting old.Â I was on the bleeding edge when I opted for OIlite over PLA bushings.
(That is the whole point of a RepRap, no?)
For now, though, I was looking for a way to fine tune my belt tension without disassembling my printer.
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Loosely zip the two small ties around your belt, then zip the larger one though them as loosely as possible. Position the large tie along the flat side of the belt, giving some thought to the position of the ratchet (center in along the top lenght is likely best, the photo's a good example of what not to do). The two smaller ties can then be aligned between two teeth as far apart as possble and tightened enough to grab the belt.
You can now tighten you belt by tightening the large tie!
Since you can position them ties anywhere in the belt and once trimmed they have a very low profile, you can use this methid in tight spots like a Prusa Y-stage with little difficulty.
The only down side is that it's a one way adjustment. If you get it too tight, you may be able to get a needle or small screw drive into the ratchet box to release it, or cut it off and try again. For the price, it's still a good deal.
*(Cable tie model borrowed from grabcad.com/library/cable-tie-mount without permission for illustration only, I wouldn't suggest printing it - especially if you belts ar loose!)
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