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Parametric Timing Belt Generator
This OpenSCAD module generates open, closed, and coiled timing belts in a variety of tooth styles. The belts are useful in light to medium duty projects and in prototyping.
3D printer parts and enhancements
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Commercial use is allowed, you must attribute the creator, you may remix this work and the remixed work should be made available under this license.
Description
I have been tinkering with some alternative ideas for transmitting mechanical power to the hot end of my Ultimaker, and I wanted to try different belt types for it. Not having a big budget to buy belting, but a spare spool of Taulman 618, inspired me to expand on a belt generator module by DoomMeister and a tooth library by Droftarts.
The module now prints straight segments, closed loops, and coils of belting in the following tooth profiles: MXL, T2.5, T5, T10, GT2_2mm, GT2_3mm, GT2_5mm, AT5, HTD_3mm, HTD_5mm, HTD_8mm, 40DP, XL, and L. I provided middle of the road defaults for backing thickness and belt width for each profile, but the defaults can be overridden. The rendering time in OpenSCAD seems to be a function of the number and complexity of teeth, and the print layout, and the times increase exponentially after a point.
Materials and methods
A strong but flexible filament like Taulman 618 nylon is suggested for functional belts.
Documents
Edit in 3dslash
Comments
shuravisj60 added this to the инструмент collection ago
Jeff Hertzberg closed issue Module Invocation ago
Stefan Schmitt created issue Module Invocation ago
Bok NgSinco created derived design Simple As Posible Belt Tensioner ago
grandbobs added this to the stuff to make collection ago
Rafał P closed issue Problem wich generate belt agoRafał P created issue Problem wich generate belt ago
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MakeIt-Better added this to the Prototyping collection agoJeff Hertzberg commented agoSorry, still no weave option. That's a lot more code than I have time to do, considering my current work.
IIRC, you probably are not getting a preview because maximum_diameter (@line 52) limits the belt diameter to something that would fit on the printbed.
I suggest you print a spiral belt, join the ends, and see if that works for you.
goldentuna1200 commented agoAlso .. (sorry - newbie OpenSCAD user) .. I've tried:
module belting(
print_layout = "loop_inner",
tooth_profile = "GT2_5mm",
belt_length = 1580,
belting_width = 6,
max_diameter = maximum_diameter)
{
and
module belting(
print_layout = "loop_inner",
tooth_profile = "GT2_5mm",
tooth_count = undef,
belt_length = 1580,
belting_width = 6,
backing_thickness = undef,
max_diameter = maximum_diameter)
{
.. and neither give me a 'preview' ... what should I be using there to get a GT2 belt 6mm wide 1580mm long?
goldentuna1200 commented agoI downloaded the new SCAD - but I don't see an option to weave the loop inside it's self to print a longer closed loop on a bed .. is there one? if so, which would I pick?
goldentuna1200 commented agoExcellent - thank you .. yeah, I was going to try with a SainSmart Flex, or SemiFlex - those are still flexible, but don't have the 'stretch' that NinjaFlex has ... I will certainly try your new OpenSCAD file.
I did figure out a way to splice my 'regular' GT2 belt - that looks like it will work, but I'd really like to try to print out my own.
Thank you for your response!
Jeff Hertzberg commented agoHey goldentuna1200, I looked at doing that awhile back, but found that the tight bend required for reversing direction left the belt too kinked for my needs. I was using nylon back then. It may not be as bad with TPU. In any case, I just uploaded a newer version of the OpenSCAD file, with more belt options.
goldentuna1200 commented agoIs there anyway to make a closed loop belt weave or spiral to fit a longer belt on a print bed area?
I need a closed belt of 1580mm, and using this it gives me a belt diameter of 508mm.
thanks for your work on this.
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Jay's 3D Adventure added this to the To Make collection ago
allen kelley added this to the things to make collection agoJeff Hertzberg published this design ago