(Un)original Prusa Heated Drybox

Disclaimer:

- This model has some flaws as described by the community, solutions to some of these flaws can be found under the remix tab. - This can be quite a difficult project. Though it is possible to do without any prior knowledge, knowing what you are doing would definitely save you some headaches.

Update July 18, 2024

- Added a vertical display mount Update July 6, 2024

- Relabelled the top Beam A1 & A2 to Beam A3 & A4 so it is easier to understand what parts to pick for your configuration. Functionally both parts are exactly the same. - Added a troubleshooting section with a guide on how to identify the problem and a section where solutions to common errors will be placed - Added a parts list with the parts of the (Un)original Prusa Drybox that have to be (re)used Update July 5, 2024

- Slight revision of “Bracket X”, removed pinholes for the Arduino making it easier to align with the cutout for the USB-C port. - Added “Bracket X_Long” which adds compatibility with the longer (37mm) MOSFETs provided by Blurolls. Update July 4, 2024

- It turns out Blurolls is shipping two different versions of the mosfet, the electronics are the same however one is longer than the other and therefore doesn't fit in bracket X. The short version is 35mm long and does fit in the current model. The longer version is 37mm and a new model will be available asap, for now the remixed 3mf file by @MKEDan can be used Update July 3, 2024

- Added schematics to the instructions for the electronics - Will continue making the instructions more detailed Update June 18, 2024

- Improved Beam A1 & A2 so the heat set inserts are easier to install. Update June 12, 2024

The electronic parts are now available through Blurolls !

About

The (Un)original Prusa Heated Drybox is a heating add-on for the (Un)original Prusa Drybox. The heating add-on gives the extra functionality of drying wet filaments and even constantly heating to reduce the relative humidity. The add-on is available for both the CLASSIC and SLIM Edition of the drybox and is a good project for anyone who wants to learn how to solder and work with electronics. The heating system features a 200W PTC heating element in combination with two fans to blow hot air through the drybox. The heating system is located under the top panel of the drybox ensuring that the drybox still holds up to 6 spools with a diameter of 21 cm. Using the 2mm polycarbonate panels and with all 6 spools the heating system can reach temperatures of up to 45 degrees Celsius or 113 degrees Fahrenheit in 15 minutes making it perfect for drying multiple spools of PLA at the same time*. It can also reach temperatures of up to 65 degrees making it suitable for PETG**.

* More specifications such as power consumption and heating graphs will be added in a user manual soon

** Keep in mind that it will take longer to heat with more spools

Support

If you like this or any of my other models consider buying me a coffee. https://www.buymeacoffee.com/bramelema

If you donate over €5 as a thank you you will be added to a list of supporters below (write the name you want to see here in the comment box).

Supporters #1 Mikko Laaksonen, #2 Vespercorp, #3 Anonymous, #4 Andrewlb.com, #5 Peter from Blurolls, #6 Walter Bracke, #7 Alex Krasno, #8 Sarah, #9 Greg & Maud, #10 Arcaik, #11 Joost, #12 Psych0h3ad, #13 T. J. Domsalla, #14 Photastro, #15 Anonymous, #16 Ment57, #17 Jim Callahan, #19 Werner, #20 Svaar Caldersson, #21 Bronco7794, #22 CowboyWillT, #23 Filip, #24 Kukulin, #25 mdandersen, #26 Anonymous, #27 Dennis, #28 JT, #29 Thomas Trueten, #30 Kilsgaard

Special thanks to #18 WBSP

Thank you everyone for your support!

Buy the electronics

The parts for this project are available through Blurolls and can be bought here:

Blurolls or Aliexpress (electronic parts and screws, optional PSU)

Note: I receive a small portion of each sale which helps me develop future projects like this one

Gallery

Print settings

I recommend printing with 3 walls and 25% infill. The parts are designed to be printed with a 0.2mm layer height. The parts have already been placed in their optimal orientation. Most parts have to be printed with some supports however they are designed to be printed with little and easy-to-remove supports.

Bill of Materials

The BoM is the same for both editions of the drybox. A kit with the Electronic parts and Screws will be available through Blurolls soon

Filament

If you already have a drybox and need to print the replacement parts, the printable parts add up to around 550 grams of filament when using 3 walls and 25% infill. When printing a new drybox around 325 grams of filament is used on top of the filament for the drybox itself.

Since the drybox is being exposed to heat using PETG, ABS, or ASA is required for both the drybox and the heating addon. Due to the heater being mounted to “Bracket Y” it is highly recommended to print this part in ABS or ASA.

Electronic parts

Part: Amount: Picture:

24V 200W PTC Heater 1

24V 350W PSU 1

0.96 Inch OLED screen 1

6*6*5mm Tactile Pushbutton 3

Arduino Nano V3.0 (clone) USB Type C 1

5-36V 15A Mosfet 1