Bead Chain Gear Drivetrain and Enclosure (fully parametric)
by adgaudio, published
The openscad code is fully parametric and designed to be both customized and modified, and easy to install.
This system generally should work for situations where a bead chain needs to be moved, but is fairly loose and prone to skipping.
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I'm glad you guys are interested! I'm currently fine tuning the parameters to sizes that fit the above parts, and the parts are coming out pretty well! Once I've put the pieces together, I'll probably add a section on electronics. This will also need a mount plate or some kind of bracket to fix it in place (to the wall in my case). I'll keep you updated with progress!
In the mean time, the latest version is on github. :)
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The scad code (see github link below) is fully parametric. It's also namespaced, so it should be fairly simple to manipulate, and do things like use different gears or change the bolt size.
Check out the latest openscad code on github:
1 x m8 30mm bolt + nut
6 m8 washers
1 x 608zz bearing (or other same sized bearing)
2 x m3 20mm bolts + nuts + washers
2 x m3 10mm bolts + nuts
1 x stepper motor (http://www.allelectronics.com/make-a-store/item/SMT-108/STEPPER-MOTOR-6-WIRE/1.html)
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