Friendlier x/y belt pulley for Mendel/Huxley
by g_koch, published
A slightly more printer friendly version of the small x and y belt pulleys found on the Reprappro Huxley and Mendel (and probably other printers that use a belt of the same type).
I was having issues printing the .stl that reprappro provided because Slic3r was trying to get my printer to make two round shells and then extrude tiny, lonely drops to make the teeth. (https://github.com/reprappro/Mendel/blob/master/Print-mendel/Individual-STLs/pulley-2off.stl)
I made the teeth on the gear more pronounced by reducing the inner diameter, making it easier to get more defined teeth by convincing Slic3r to print all of the teeth in one shell.
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I got the pictured results at 30 mm/sec, 3 vertical shells, .2 mm layer thickness, 150% extrude width on my .5 mm nozzle. I recommend 100% infill.
Get the extrusion temperature as low as you can get it for the teeth. My first layer was 200Â°C at .5 mm for awesome adhesion to my kapton-covered 80Â°C bed. After the round bit, I reduced it to 174Â°C, but these numbers will vary based on your printer/PLA combo.