Gridfinty Go! boxes with filament pin latch (Update Jun 12)

Meant to ease one of the biggest challenges in organization: Packing and unpacking to go somewhere.  

Now you can just grab exactly the gridfinity modules you need, toss them in a bag, and have a place to put them when you're done!

Height Extenders

Rather than boxes in different heights, we have extenders. These connect to the hinge and latch just like a lid, and accept a lid or another extender on top.

Note that the hinge still works on these just like a lid. If opening in the middle is would cause spilling, like a box of beads or something, you might want to use tape on the inside.  The latches are designed to be a little tighter than the lids, but to still open.

I'm working on a version that does not open at all, but that will be a future release.

The Filament Latch

Filament hinge on the back, filament snap latch on the front.  The lid has a piece of filament held between two supports, which has enough flex to get over a lip on the catch.  

Does not have magnet/screw holes on the bottom as this is primarily meant for portable use. You can stack other gridfinity tiles on top when you put the standard lids on.
 

Printing/Assembly

Prints fine on 0.6 in PLA, I assume it's fine on 0.4 too.  You might have to ream or drill or otherwise clean up the holes.    You don't need to melt the ends of the filament pin to keep it in place, it seems to hold just fine 

Almost everything prints without supports.  Technically, the height extenders need support in two places but it is possible to do them without it.

The filament pins

I have heard it's best not to use PLA for the pins, because it will get brittle over the years, but it works short term with no issues, even with old already-brittle filament.

Different filament types have a different springiness for a harder or softer snap.  

PETG seems to be the absolute best(Although it may be a little too tight), but nylon is just about perfect with the standard lids too.

Nonopening Lids

These are not currently used for anything in the system, but could be useful for height extenders, piggy banks, suggestion boxes, and electronics cases.

They can be easily removed by taking off the hinge pin but otherwise they stay shut.  They do not use a filament latch on the front.

A STEP template is provided for creating 1x1 nonopening lids.  It was designed through trial and error.

Remixing

Box and lid have STEP file templates available to customize them. 

The extenders also have STEP files, because you could use them as a base to make multi-tier storage.

For remixing purposes, the lid latch and hinge design can be considered CC0 as they are not from the official Gridfinity, aside from the 41.5mm size.

Height Spec

The height of any bin at the rim should be 5 less than a multiple of 7mm, to account for the height of the latch and the lid.  The height at the top of the latch is always a multiple of 7.

If you have a decorative lid that can stack, the place where the next bin rests should be 5 more than a multiple of 7, so that the whole thing together is always a Gridfinity height.

We try to keep everything to multiples of 3 units tall, so we have fewer different heights.

Credits

The baseplate I used in the picture is this one, not my design, but very awesome.
https://www.printables.com/model/400614-gridfinity-push-together-baseplate-magnet

Inspired by this SD card box, which uses magnets instead of a filament latch:

https://www.printables.com/model/292285-grab-and-go-gridfinity-sd-card-holder

Changelog

Jun 12 2023:

• Add non-opening extenders.  Semi-manually, semi-parametrically generated, print at your own risk! These are new and beta!
• Remove old style extender files, they had a few issues and were too short

Jun 5 2023:

• Add 2x3x6 box and 2x3 lid

Jun 4 2023:

• Added 4x1 pen case boxes and lids.
• Remove the old style lids, new style lids are well tested.
• Add “Cleanup-free” boxes.  These have 2.2mm filament holes instead of 2.0
• The 2.0 boxes will probably be removed later.
• Templates will remain at 2.0mm, because it is easier to widen than shrink with a script.

May 14 20203:  

Change lid top side to make it stack a little nicer, remove mechanical drawing, use STEP for reference, FreeCAD keeps breaking the drawing

May 17 2023:

Make everything 2mm taller to stack better with regular gridfinity in the same layer.  Remove some sharp edges.   Add the 2x2 box and template.

May 18 2023:

Make internal depth bigger, get rid of some unnecessary bottom thickness

May 19 2023:

Add the height extension blocks, clean up the description file

May 20 2023:

Add a template for a nonopening lid

May 22 2023:
After further testing, the extenders need to be a little taller

May 23 2023:

Gridfinity base fits better now.  Add 1x1x3 boxes