Assembly

Six objects are printed using four generated STL files. They ought be printed in the generated orientations.

• Top
• Upper (hot) chamber
• Lower (cool) chamber
• Internal components (load cell coupling, motor coupling, spool platform)

The OpenSCAD files can be found on Github. The zipped STLs can be found here, and a 3MF is also available. I print them with the Arachne perimeter generator and infill combination using cross hatch for the sparse infill. Using Polymaker Fiberon PA6-CF20 (nylon-6 + carbon fiber) with these settings, all components come in just over 600g.

Warp-free printing is essential. Warping of the internal components or the lower chamber can result in the spool not sitting level. Warping of the upper chamber can result in it failing to mate to the lower chamber.

1. Push the 175℃ thermostat through the bottom of the upper chamber.
2. Push the LM35 through-hole thermostat through the three small holes in the floor of the upper chamber.
3. Use four M4 screws to mount the ceramic heating element to the floor of the upper chamber.
4. Use four M5 screws to mount one of the 80mm fans to the outside of the upper chamber. The logo ought be facing out; this fan is an exhaust.
5. Insert the power plug/rocker switch unit into the rectangular hole on the side of the lower chamber. It ought not move once inserted. Secure it with hot glue.
6. Use two M5 screws to mount the AC adapter to the floor of the lower chamber, on the side opposite the intake fan.
7. Wire the plug/switch to the AC adapter.
8. Place the AC shield atop the AC wiring, and push it down. Secure it with hot glue.
9. Use four M5 screws to mount the PCB to the floor of the lower chamber, next to the intake fan.
10. Insert the antenna into the antenna hole to the left of the lower chamber's fan. Secure it with hot glue.
11. Connect the antenna to the U.FL connector on the PCB.
12. Use four M5 screws to mount the other 80mm fan to the outside of the lower chamber. The logo ought be facing in; this fan is an intake.
13. Connect the lower fan to the fan connector marked "lower" on the PCB.
14. Connect the upper fan to the fan connector marked "upper" on the PCB.
15. Use two M5 screws to mount the load cell to the central riser in the lower chamber.
16. Insert the motor into the motor coupling, ensuring the positive terminal mates to the hole marked '+'. The terminals ought go through the holes.
17. Wire the motor to the PCB.
18. Wire the heating element to the 175℃ thermostat.
19. Wire the heating element to the PCB.
20. Wire the 175℃ thermostat to the PCB.
21. Place the upper chamber atop the bottom chamber, matching the four holes.
22. Use four M5x35 bolts to securely mate the two chambers.
23. Push the spool platform down around the motor coupling.
24. Push the motor coupling down around the rotor and the top of the motor. The platform ought provide a level surface.
25. Place the top into the upper chamber.

1. The Dankdryer PCB.
2. 120VAC → 12VDC adapter.
3. 2x 80mm 12VDC be quiet! Pure Wings 2 4-pin fans.
4. 5kg load cell.
5. 12VDC brushed 5RPM motor.
6. NEMA plug + rocker switch.
7. RP-SMA antenna + U.FL adapter.
8. Wago 1x2→2x2 splitter.
9. 230℃ ceramic heating element.
10. 175℃ thermostat.
11. Roof microboard (currently perfboard + throughhole components).
12. Small bar magnet.
13. Bolts and appropriately preterminated wires.