Easy Latch Gridfinity Lite Box

I version of Pred's Gridfinity box with easier closing latches and theLolrus's lite implementation, kept parametric.
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updated November 11, 2023

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I started running Pred's amazing Gridfinity box, but found that I spent way too much time on post-processing to get the latches to close, used too much filament/time per print, and cut my knuckles on the non-chamfered corners on the lid latch area.  

  1. -The latch catch nubs:  I found the latch catch nub (on the latch itself) problem for me was two-fold.  My layer settings initially cause the spring nub catch on the latch to not be freed for movement, which caused tearing chunks out of the box when forcing latches closed. After changing layer settings I found the latch catch spring was too thick (for my PETG) at 1mm.  I reduced it to 0.7mm.
  2. -The locking tabs on the box: Since they come out at a 90 from from the box (printing a loop in thin air), I have no idea how this cannot produce the sag for others which doesn't allow my latches to close. I have a tuned Voron with a 5015 part cooling fan. I'm guessing many others experience this. I experimented and found that if I flush-cut those sagging extrusion loops off the tabs that my latches close well.. perfect in fact.  No way am I trimming all of those off 20+ boxes.  I modified the middle two sets of tabs to come out at a 90 just a tiny bit, then switch to a 50 deg angle thereafter.  This was a trade-off between an aggressive 45 from the box and the Pred original design. This allows not losing too much tab, while also being pritable without sag for most printers. 
  3. -The knuckle slicing corner. I bet I'm not the first. So when you are putting great force into closing and opening these difficult latches, BAM, you slice your knuckle on the non-chamfered corner at the top of the lid. I chamfered those a tiny bit to not reduce the latch spring catch nub force. 
  4. -LITE: I basically applied theLolrus's lite approach with my less-than-novice approach to F360. This set off a warning in the F360 history for patterning.  It seems to still work fine, but maybe someone can fix this.  I REALLY hope the original master for this file can implement both “easy latch” and “lite” as options parametrically.  Hopefully the knuckle busting corner can be perma-chamfered 'cause it makes sense. 

Thanks to the thought masters and cheers all!

Just print with the creators recommendation and hopefully no more filing or post-processing!

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