Dankdryer

Some engineering filaments specify drying at temperatures up to 140C. Standard filament dryers can't approach this temperature (most peak at 70--80C). How to construct one that can handle it?

We need materials and electronics which can operate in such an environment. Ideally, we'll keep most of the electronics out of the heated chamber, but it'll likely be quite warm immediately outside as well. This seems possible for everything but our sensors, which must necessarily be within the chamber. We'll need a thermostat, and might want a humidity sensor. We'll also have a load cell to weigh the spool/chamber, and thus let us know how much water has been evaporated. I haven't been able to find a humidity sensor rated above 100C, so that's a nonstarter. We'll want to put the thermostat on lengths of wire.

We'll drive the ceramic heating element via AC, as it wants significant wattage.

Filament-wise, the hot chamber, heat shield, and central column will be printed in Bambu PAHT-CF, while the bottom chamber will be printed in Polymaker polycarbonate.

In chamber

• Thermostat: LM35 (up to 150C)
• Heater: 110V 230C 3.03" x 2.44" (230C)
• Humidity sensor: n/a
• Chamber material: Bambu PAHT-CF (225C)

Outside of chamber

• Motor: Geartisan 12V DC 5RPM motor
• Load cell: HX711 + 5kg axial load cell
• MCU: ESP32-S3-WROOM
• AC -> DC 12V adapter
• LMS2596 buck converter
• TB6612FNG motor controller
• Chamber material: Polymaker polycarbonate clear (260C)