Soval Filament Dryer SH01 with motor
Description
I put a motor in my dryer. I used a N20 geared motor (Brand: Greensen, 68rpm at 12v) and two Ikea AAA battery’s ~2.8v and the result speed for the spool was ~14 rpm. Lid opening ~40% of the area compared to having the lid partially open (standing on locking mechanism). I reduced the opening because the device struggled to reach set temperature in the filament. The built-in temperature and humidity gauges are useless so I used other ones. The built-in humidity sensor is probably located behind the display and temperature is probably just an offset from temperature sensor on the heating element. <h1>Test: </h1> Set temperature: 50C Filament: 1Kg black ABS 0h: Humidity 49% (round hygrometer meter) Filament: 26.9C (IR-meter) Top air temp: 26.7C Motor temp: 26.3C (IR-meter) 1h: Humidity 34% (round hygrometer meter) Filament: 40.3C (IR-meter) Top air temp: 38.5C Motor temp: N/A (IR-meter) 3h: Humidity 29% (round hygrometer meter) Filament: 42.3C (IR-meter) Top air temp: 39.3C Motor temp: 35.6C (IR-meter) 6h: Humidity 26% (round hygrometer meter) Filament: 43.2C (IR-meter) Top air temp: 39.1C Motor temp: 35.7C (IR-meter) The geared motor is almost quiet at this low voltage/rpm but it’s amplified by the box so it’s a little noisy. This cheap gearbox isn’t the best and I don’t know how long the worm gear will last. I believe that it safe to use 50C setting with PLA if the spool rotates all the time. <h1> What you need: </h1> N20 geared motor (68rpm at 12v) with two shafts https://www.amazon.se/-/en/gp/product/B0D181F8H3/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1 Rubber tube with inside diameter 5mm and outside diameter 7.5mm (I used Car Windshield Washer Hose) https://www.biltema.se/bil---mc/bilreservdelar/torkarutrustning/vindrutespolare/spolarslang-5-m-2000031910 2x M3 screws STL, STEP and Fusion files included. <h1> Note: </h1> I did a retraction tower before and after drying the filament at 50C 6h and there was no difference for PLA. The PLA was delivered in a bag with desiccant but the air inside the bag was ~ 40%. It was also left out in the open for about a week. I don’t think a filament dryer is needed for PLA unless you live in a very humid area.
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