A ground-up port (with a few extra features) of the stock gridfinity bins in OpenSCAD. Open to feedback, because I could not feasibly test all combinations of bins. I tried my best to exactly match the original gridfinity dimensions, but some of the geometry is slightly incorrect (mainly fillets). However, I think they are negligible differences, and will not appear in the printed model.
Full documentation can be found at the project's website.
The project can also be found on Printables if you want to support the project.
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The printable holes allow your slicer to bridge the gap inside the countersunk magnet hole (using the technique shown here) so that supports are not needed.
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For best results, use a version of OpenSCAD with the fast-csg feature. As of writing, this feature is only implemented in the development snapshots. To enable the feature, go to Edit > Preferences > Features > fast-csg. On my computer, this sped up rendering from 10 minutes down to a couple of seconds, even for comically large bins.
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This work is licensed under the same license as Gridfinity, being a MIT License.