Source code

This is a parametric seeder wheel, with default parameters for a Jang seeder. You can adjust things like the diameter and borehole to adjust for your printer's tolerances. You can also adjust the number of seed cells and their size.

If you want to make an enhancement to this Thing, please fork the source project and submit a pull request; comments in Thingiverse aren't really great for communicating code edits.

Jang.Seed.Rollers.zip contains all the rendered STL files.

If you want a custom roller, I strongly recommend downloading seed_roller.scad and seed_roller.json, and opening the scad in OpenSCAD - the native customizer is far more robust than the one on Thingiverse.

Elegoo Mars 2

No

No

0.05 mm

100%

I've printed this both via FFF in orange PLA and via MSLA in black resin. The resin print is much more durable and accurate, but the PLA version works just the same.

I started from an existing Jang wheel, took measurements, and implemented a fully parameterized version out of shape primitives.

Doing this taught me how to do polyhedrons in OpenSCAD, which have more gotchas than you'd think.

[Edit: Later work on this taught me how to use linear_extrude with 2d shapes. I'm beginning to think most of OpenSCAD is jam-packed with gotchas.]