Idea: Magnet holes in baseplates without gluing.

[Ruudjhuu]

Lets add a small layer on top of the magnets hole so we can pause the print, insert magnets and resume the print, This eliminates the messy gluing of magnets which might not stay in place.

got the idea from the thread from u/3dbender

[nelsongraca]

What about press fit magnets?

[oernii]

Here is something for fusion360 https://github.com/software-2/FusionGridfinityGeneratorPressureFit

[nelsongraca]

@oernii it is a possibility but I can't really eun Fusion on Linux and much prefer an openscad approach, I can try to work on it.

[Ruudjhuu]

@nelsongraca with press fit, do you mean a tighter hole? That is currently fairly easy to do by changing r_hole2 in the constants file (you can also overwrite this in any file where the utility modules are used). This also depends on how precise someones 3d printer can print. I do not think it is possible to create a boolean in the UI which just enables press fit.

[mrcpu99]

I created pressfit (or more accurately print-inplace, albeit it started with pressfit), by slightly modifying the cadquery version to leave a tiny hole in the baseplate on the top side, that opened into the larger cavity with a 2 layer covering, but the small hole (.5mm I think), keeps the big cavity open. Pause at layer X, drop in magnets, and voila.

I tried to recreate the same in the openscad one, but can't quite figure it out, I just don't know it well enough.

I did not have good luck with pressfit and PETG plates. Either too tight or too loose, never quite got it dialled in. Might try some PLA and see, but either I was hammering too hard and the PETG shattered, or after a few insertions and removals of the bins, the magnet would pop out.

But I'd love to see any solution that doesn't involve gluing, especially to PETG. :)

On Mon, Mar 27, 2023 at 1:09 PM Ruud @.***> wrote:

@nelsongraca https://github.com/nelsongraca with press fit, do you mean a tighter hole? That is currently fairly easy to do by changing r_hole2 in the constants file (you can also overwrite this in any file where the utility modules are used). This also depends on how precise someones 3d printer can print. I do not think it is possible to create a boolean in the UI which just enables press fit.

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[marc-gist]

customizable hole size would allow people to choose any of the above I would think.!

[kennetek]

Like Ruud said, adjusting r_hole2 in gridfinity-rebuilt-constants.scad will allow you to tune the hole size for your magnets and your printer. The main file parameters are typically reserved for high level abstract features, while the constants file has specific dimensions.

There are a couple ways people have been looking at inserting magnets for baseplates, including pausing the print as well as adding a single layer "bar" that bridges over the gap to allow magnets to slip under.

[GreenEllipsis]

I wonder if a snap-fit might be the best of both worlds?

On Thu, Mar 30, 2023, 10:49 Kenneth @.***> wrote:

Like Ruud said, adjusting r_hole2 in gridfinity-rebuilt-constants.scad will allow you to tune the hole size for your magnets and your printer. The main file parameters are typically reserved for high level abstract features, while the constants file has specific dimensions.

There are a couple ways people have been looking at inserting magnets for baseplates, including pausing the print as well as adding a single layer "bar" that bridges over the gap to allow magnets to slip under.

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[nelsongraca]

@GreenEllipsis Sounds like a good idea

[GreenEllipsis]

I am thinking now that slots might be easier to implement and more robust.

---

Brian Alano @.** (812) 320-1508 Green Ellipsis* Design for the Circular Economy

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On Sat, Apr 1, 2023 at 3:05 PM Nelson Graça @.***> wrote:

@GreenEllipsis https://github.com/GreenEllipsis Sounds like a good idea

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[john-parton]

I believe there is an implementation for press-fit magnets in the base here: https://www.printables.com/model/413761-gridfinity-refined