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kennetek / gridfinity-rebuilt-openscad

A ground-up rebuild of the stock gridfinity bins in OpenSCAD
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Magnet slots on bottom of bin are too small #145

Open dkovar opened 5 months ago

dkovar commented 5 months ago

The no-glue slots on the bottom of the bins appears to be 5.8mm wide. The magnets are 6mm wide. I cannot insert the magnets without forcing them and that usually results in deforming the slot.

Am I failing to understand how to use these?

All other dimensions appear to be correct.

Ruudjhuu commented 5 months ago

This is the idea of the no glue holes, it is press fit. So you should force it so they won't fall out. If you measure the printer hole, do you get 5.8mm ?

dkovar commented 5 months ago

Greetings,

There is an option to turn on slits rather than holes. If you use this option, it prints with a solid bottom and a slit in the side to insert the magnet. The magnet ends up in the same location but with a thin layer below it to hold it in place. This is different than the press-fit approach.

The problem is that the slit is too small to force the magnet into the slot.

-David

On Jan 16, 2024 at 6:40:17 PM, Ruud @.***> wrote:

This is the idea of the no glue holes, it is press fit. So you should force it so they won't fall out. If you measure the printer hole, do you get 5.8mm ?

— Reply to this email directly, view it on GitHub https://github.com/kennetek/gridfinity-rebuilt-openscad/issues/145#issuecomment-1894692747, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAP5QUFIYNVF7R3TMXQPDGLYO4FWDAVCNFSM6AAAAABB5BOI6GVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQOJUGY4TENZUG4 . You are receiving this because you authored the thread.Message ID: @.***>

MLCXXX commented 4 months ago

Hello, the deformation limits the stacking capability and the overall height no longer corresponds to the standard dimensions. An increase around the z-axis of the cut-out while maintaining the dimensions in the X/Y-axis should provide sufficient support for the magnets or, if necessary, a "ribbed" wall on the X/Y-axis. Perhaps that would be a solution?

jpypi commented 2 months ago

So, I believe @dkovar is referring to the style_hole = 4 option, which is the "Gridfinity Refined hole". The standards file has the magnet radius (r_hole2) set to: 3.25mm, which gives a diameter of 6.5mm but then in the refined_hole() module, r_hole2 is subtracted by 0.32mm to reach a diameter of 5.86mm. @dkovar You could try adjusting the r_hole2 variable in standard.scad? Maybe r_hole2 = 3.28?

I would think 0.14mm should be ok for a press fit, though maybe that needs to be reconsidered?