Project repository: https://github.com/FarK/winder

Wool Winder ==========

This project consist in a series of 3D printed pieces for assembly a wool winder. It is based on a couple of existing project and comercial products [1][2][3].

All the pieces was design for an easy print. No support is needed.

All was design in OpenScad[4] and there is a lot of customizable parameters, like the gears size and angle, the bearing and threading rod radius, the screw holes radius, etc. You can find all these parameters at the header of the `winder.scad`.

https://www.youtube.com/watch?v=sXUekIx7C48

Generation ========== The easiest way for generate all the pieces is use the provided makefile. After launching the `make` command, you should find all `*.stl` inside a folder named `stl/`. There is an "special" `all.stl` which contains all the pieces spread in a plane. There is another make target, `make images`, for generate a folder with two images of each piece, one normal preview render and another cross-section render.

You can also open `winder.scad` with OpenScad, go to the end of the file, select the assembly module you want to generate (the ones in capitals: `BIG_GEAR()`, `CRANK()`, `POLE()`, etc), or generate the `WINDER_SPREAD()` module, which contains all the pieces. When use this method, do not forget hit the render button before exporting the `*.stl` in order to get a full resolution model.

Guide threaded rod length

The length of the threaded rod for the thread guide is calculated, based on the configured parameters, for put the guide at the same height of the turning center of the spindle.

You can find this length using the following command: `make guide_length`, or printed in the command window of OpenScad.

BOM === The only not printed pieces you need for assembly are:

• threaded rod: 1m should be more than enough
• nuts: 7
• bearings: 5

You can choose the dimensions you want (ie. bearing diameter and rod metric) and adjust them in the configuration parameters at the top of `winder.scad`.

Assembly ======== The assembly is quite straightforward. If you take a look to the cross-section model into OpenScad (the WINDER_SPREAD() module) and see the sample video, you should have no problem building it yourself. If you note the nuts unscrews with the vibration, you could use self-locking nuts or apply a bit of nail polish to the screw.

TODO ====

• Add a counterweight
• Support timing belt based transmission
• Support double bearing shaft for the crank

License ======= This project is licensed under the GNU GPL 3.0 license

This project also use a slightly modified library made by GregFrost and named Parametric Involute Bevel and Spur Gears for generating the bebel gears. This library is licensed under GNU LGPL 2.1, you can find a copy of this license in `LICENSE.gears.txt`. You could find the original file here: http://www.thingiverse.com/thing:3575

References ==========

• [1]: Homemade wool winder: `https://www.youtube.com/watch?v=nJKxa9mhLuI&t=685s`
• [2]: 3D printed wool winder: `https://www.thingiverse.com/thing:13816`
• [3]: Comercial wool winder: `https://www.youtube.com/watch?v=wf7lT6OYEQ0&t=69s`