I purchased a 2‑tray drying oven, but soon realized that the four trays on the side of the machine were underutilized.

After taking precise measurements and creating a 3D model in UG, I ran the first slice—and discovered that the material consumption was far too high. To address this, I reduced the wall thickness and trimmed down the component design.

Unfortunately, the inexpensive PETG filament I bought often resulted in warped prints or poor layer adhesion; screws would crack the parts when tightened, so I ended up just using adhesive to get by.

Another issue arose from inadequate shrinkage compensation: the four mounting holes for the swivel axles were slightly misaligned—holes 1 and 2 could be widened by just 1–2 mm toward the left. When slicing your model, be sure to adjust the settings according to your specific needs.

The drying assembly was repurposed from the original 2‑tray unit I’d bought. Inside, you’ll find buttons, a display screen, temperature sensors, humidity sensors, a heating plate, a fan, and a power supply. If you don’t need drying functionality, you can modify the model yourself—there are dedicated slots at each corner for placing desiccant packets.

You’ll need M3 screws for assembly. The door was laser‑cut from acrylic based on a CAD file I found online, complete with hinges measuring 32 x 25 x 1.5 mm. The interior sidewalls of the enclosure are lined with thermal insulation foam.