Polybox - The new Filament Dryer of choice

Convert your Polybox Dry Box into a Dryer while storing your Filament
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updated March 30, 2023

Description

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I wanted to convert my Polybox to a filament dryer / dry box all in one. Had a few other ideas but this one is by far the better solution I was able to come up with and is self regulating and seem to be doing a decent job at it. 

Sorry for the poor photos. It was all during DIY and testing

Parts Needed:

Printer Setting:

  • Material: Fusion3D PETG
  • Supports: Yes
  • Details: Default 0.2mm

NB!!!! - Do not print it in PLA as you need higher thermal resistance. PETG, ASA recommended

Results:

Will update with my results after its been running for a while and got up to temp (Element is a 50'C 220v 20w element that has a surface temp of 60'C +- according to specifications)

Update 1 - 20w element only brings it up to 32'C … Going to order the 30w element that is rated 90'C at 220v (with the constant airflow the surface temp cools off quite quick so the 20w element is not effective in this regard)

Update 2 - 30w Element does not seem to get hot enough for some reason. 32.5 degrees for the chamber. Don't know how high one should try go as it seems like the PCT heaters internals get hot but there is no thermal dissipation. Going to reach out to the manufacturer

Update 3 - Put a Hydrometer inside and the values on the Hydrometer is not the same as the Polybox values. Not even close. Temp on the inside is constant 35-40'C with the 30w element with Humidity at 20% where the Polybox meter reads 29'C and 32% humidity. For now I think this is good with a 30w element. If you want you can just buy the 40w to get into that drying temps but for me this is good. When I open a new roll it goes directly into the Polybox

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The author marked this model as their own original creation.

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