Parametric Laser-Cuttable Pulleys
by D1plo1d, published
Description
I haven't cut these yet so you might want to be cautious for the time being.
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As I generate the files, all I'm getting is circles. No actual teeth.
update: the gears work very well! Cutting them on a good quality laser cutter has eliminated my skipping issues in the x and z belt/stepper gear interface (I had previously used a set of printed gears for these made on a cupcake cnc).
Hey ril3y,
This is for synchroflex or similar belts, it's parametric so you can modify the parameters to achieve pulleys for any belt of that type.
The presets configuration for the mendel pulleys is specifically for a 4mm pitch synchroflex (or similar toothed - i think it should work with the ones listed in the RepRap documentation) belt. I used real-world measurements from my belt to generate the parameters for tooth heights and widths howe
ver it has a reasonable tolerance so it should handle some manufacturing variation. Although taking a caliper to your stepper motor shafts to verify that diameter might not be such a bad idea since I'm not sure how much they are standardized.
Right now I've got a set of these cut in acrylic and th
ey fit beautifully on my 4mm pitch, 6mm height synchroflex belt however I realized the drive-pulley-3off is to small for anything but a M1 set screw (not readily available in north america) so i'm now waiting for it to finish gluing before testing it out. Will let you know how the test goes though.
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Instructions
Layers (to be modified to fit your material thickness)
+ simple spacer
+ nut trap
+ simple spacer
+ pulley teeth
+ simple spacer
Update: The nut trap can now be turned off as can the washer-like layers and there are options to render each layer seperately if you want to use different materials.
I'm also working on preset Configurations for Mendel parts as I need them. Currently I only have a preset config for the motor drive pulleys (drive-pulley-3off - it's attached) although it shouldn't be to hard to use that as a basis for the driven pullies given you just scale the shaft up to M8 and set then number of teeth to 21.
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update: the gears work very well! Cutting them on a good quality laser cutter has eliminated my skipping issues in the x and z belt/stepper gear interface (I had previously used a set of printed gears for these made on a cupcake cnc).
Hey ril3y,
This is for synchroflex or similar belts, it's parametric so you can modify the parameters to achieve pulleys for any belt of that type.
The presets configuration for the mendel pulleys is specifically for a 4mm pitch synchroflex (or similar toothed - i think it should work with the ones listed in the RepRap documentation) belt. I used real-world measurements from my belt to generate the parameters for tooth heights and widths howe
ver it has a reasonable tolerance so it should handle some manufacturing variation. Although taking a caliper to your stepper motor shafts to verify that diameter might not be such a bad idea since I'm not sure how much they are standardized.
Right now I've got a set of these cut in acrylic and th
ey fit beautifully on my 4mm pitch, 6mm height synchroflex belt however I realized the drive-pulley-3off is to small for anything but a M1 set screw (not readily available in north america) so i'm now waiting for it to finish gluing before testing it out. Will let you know how the test goes though.
As I generate the files, all I'm getting is circles. No actual teeth.