filament dryer

Yet another filament dryer based on a food dryer... but this one is a bit different.

Hygroscopic polymers like nylon or TPU need to be dried properly before printing. But few drying solutions make it possible to feed the filament while it's in the dryer (to prevent moisture uptake while printing) - and if so, then there's too much tension when unrolling, which causes issues with direct drive extruders or very soft TPUs.

So my goal was to make a cheap dryer for at least 2 spools of super soft and super hygroscopic filaflex TPU. For minimal resistance, a center-pivot design seems to be best and since most food dryers as well as filament spools are round, a vertical-center-pivot-thingy almost suggested itself.

Unfortunately there are a couple of things you need to buy first:

1x Food dryer (this mod is for the oneconcept bonsai: https://amzn.to/3hABgdk )
4x M5*25 screws
4x V-slot wheels (that kind you can find on many CR10-type-of printers - you could also print some, I guess