Spool and Filament Drybox with numbered magnetic quick connects for MMU
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Drybox built with cheap Amazon airtight cereal containers. Contains desiccant without spilling when stood on it's side.
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An update of CAD_Dude's fantastic cereal-box filament drybox. It's a great design, but I wanted to increase compatibility with my MMU. This version has a few updates to add numbered magnetic plates for feeding directly from the dryboxes into an MMU and also an alternate spool/spindle holder design (CAD_Dude's is superior engineering, but I've found the simpler design to be easier to work with for most spools).
These work with food storage containers you can find on Amazon. Like most of Amazon's dross, the sellers come and go. However, the actual molded plastic bins keep getting sold again under new names. Look for the ones with three fluted scallops on the side.
Here's the ones I used: https://www.amazon.com/dp/B08TWH2QHV
Printing Instructions
There's three plates in the 3MF file. The first 2 are essentials, the last one is extras and alternate versions.
The second plate has a pause in the print. This is for adding 10x2mm magnets for the magnetic couplers. If you orient all the magnets the same way, everything should come out fine.
You can also set it to paint the numbers if printed on an MMU, or just print as is and highlight with a sharpie.
The plates already have support-enforcers where needed. Set your slicer to print support enforcers only.
Additional Notes
I'm not going to lie, getting these working well with an MMU has been a journey, so I'll offer some advice to hopefully save you some trouble:
- Get PTFE tubes with a 3mm ID (inner diameter) and 4mm OD (outer diameter). They're flimsier than standard tubes, but the extra space inside reduces friction.
- It's counter intuitive, but LONG RUNS of tubing are preferable to short runs.
- Your biggest problem is bends. You want your filament path to be as straight as practical, if you need to make a turn, make it wide.
- I highly reccomend getting some magnetic PTFE couplers. These are the ones I'm using: https://www.printables.com/model/761970-quad-magnetic-ptfe-coupler. Putting these before and after your buffer will make troubleshooting much easier.