Filament Drying Conversion Kit for COSORI "Pioneer" Dehydrator

A set of printable adapters and parts to turn the COSORI CFD-N051-W into a lean, mean, filament dryer!
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updated January 17, 2025

Description

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A conversion kit for the COSORI CFD-N051-W model dehydrator, which is capable of reaching 70C + and also makes excellent beef jerky btw!

There are rollers which fit standard 1kg spools down to around 500g. You can use these to feed filament directly out of the dryer and into the printer.

 

Why:

Aside from the obvious need to keep filament dry, my original dryer recently broke down. At first I bought a newer style dehydrator from Amazon, but quickly realized that most of the models on there have some issues. Primarily, most models you see on amazon are samey-same designs that all try to be a dryer AND a drybox, the problem with these is that they circulate the same air within the unit with very little venting, leading to poor drying efficiency at best, or at worst… well, see the picture of condensation in an off the shelf dryer.

Propping open the lid of these dryers can let the moisture out, but results in incorrect chamber temps (-20C from target measured with second probe). Drilling holes in the lid can help you find a balance, but still reduces chamber temps somewhat, voids your warranty, and it still takes fivever to dry things!

So this is another solution, and not a new one by any means. You start with a good off-the-shelf food dehydrator, preferably with accurate digital temperature control, and mod it to hold spools. Voila!

 

You Will Need:

  • Approx 1kg of heat resistant material. The dryer can reach over 70C, so standard PETG may not be enough if you plan to dry high temp materials. I printed mine from ASA and it works well, but there was some warping and buckling of the main chamber. For this reason I recommend either a high temp variant petg/pet with HDT of at least 80C, or one that contains carbon fiber. CF PET/G can withstand much more heat vs standard PET/G, CF ABS/ASA warps less than standard ABS/ASA. Take your pick.
  • 8x 25-30mm M3 bolts
  • 8x 625 bearings (Psst! you can salvage them from 4 old POM wheels) 
  • A printer capable of printing a 30cm build footprint OR a printer capable of printing a 256mm build footprint (Bambu P1S for example) and some patience.
     

Printing & Assembly:

  • The adapter is the tricky part, I made this model for myself originally and have a printer with a 30cm build footprint. You could use your slicer to cut the model into pieces (Orca does this for example) if you have a smaller build plate, then glue the parts together after the fact. Print the adapter square edge down with supports from plate to support the lip.
  • The main body is fairly straightforward, there's a square body section, and lid. Print the lid flat side down, and print the body with the grid to the plate and supports from plate only to support the lip.
  • The adapter fits onto the dehydrator, and the body fits into the adapter. Optionally you can glue/weld the two together after printing. The lid goes on top.
  • The rollers are printed as a tube with a tapered flange on each end, and a spacer washer for each side. Assemble the rollers by first adding a bearing to the bolt, followed by the spacer washer. The long part of the washer goes through the bearing to pad and center it around the screw, the flange end of the washer-flange-spacer-thing spaces the roller from the outside of the bearing so it can spin freely. 
  • Once the rollers are assembled just snap them into the slots in the drying chamber. There are some snapfit tabs which should keep them secured during transport, but depending on your printer and material they may not print or else snap on insertion. If they do, don't worry, they will still work fine.

 

Disclaimer:

These models are provided free of charge (donation optional and appreciated) in hopes that others may find them useful. You are responsible for assessing the suitability of the models to ensure that they meet your needs and any local safety codes. I take no responsibility for any harm or damages that may arise due to use of these models, and you accept sole responsibility for your use of the models. </blah-blah-legalese-bull***t> 

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