Ausxmods Pulley for Prusa Mendel
by GregFrost, published
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i was having the same jumping belt issue no matter how slow i made it go. i printed a couple of these and wow my problem was fixed. these are great pulleys. i found out one important fact when printing replacement parts.. ALWAYS PRINT A SPARE.. i printed 2 of these one for the x and one for the y. and i broke 1 while installing in the y. (bad angle on motor had to use tools and i snapped it.(i had a bad laminating in one spot i guess) had to install an old one then recalibrate then print another one.. but they work great
If your pulleys are too large, chances are your settings are out of tune.
I had a discussion about this with prusajr.. he showed me that his pulley dimensions are the same as the normal pulley dims...
I also ran some experiments and discovered that if your have flow set too high (or E steps per mm too high).. so that a single walled object turnes out with fatter walls
than layer thickness times Perimiter Width over Thickness.. the place it really shows up is the pulleys are too big for the belt..
most other object don't show up this error because having the perimeter slightly overstuffed makes a 30mm cube 30.4 mm square say... within the realm of reprap 'noise'.
I advise you check by printing a single walled object and making sure the perimeter works out as it's supposed to... (within 10%)... Unless prusajr changed the pulley again.. they should be correct and if you have trouble with them printing too large.. it should come down to tune...
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