April 9, 2022
Description
Update 1/5/2021: Flipped motor and moved gear to front shaft section, attached rigidly against the front bearing. Motor noise has been reduced significantly. Switched out 20mm M3 screws to 15mm.
An oscillating desk fan, designed in Fusion 360. Everything is printed except for fasteners and electrical components. Optionally contains a rechargeable battery for completely portable operation.
Fusion 360 link: https://a360.co/3qBHxLy
Video: https://youtu.be/vgS1dX1ZaXw
Base materials:
| Item | Quantity | Notes | | --- | --- | --- | | M3x10mm bolt, button head | 19 | | M3x15mm bolt, button head | 4 | | M3 lock nut | 17 | | 130 size hobby motor | 1 | Currently using an 11.5k rpm@6v motor. Try to get one with stronger magnets for higher torque. | | SPST Toggle switch, M6 thread | 1 | | 608 bearing | 2 | | 22awg or similar wires, heatshrink, etc. | Varies |
Rechargeable option:
For this option, print the regular bottom plate, as well as the base midplate. Do not print the non-rechargeable version of the bottom plate. The battery will sit under the midplate, with the charging electronics attached to the top with hot glue or double sided tape.
| Item | Quantity | Notes | | --- | --- | --- | | TP4056 battery charging board + protection circuit | 1 | | LiPo battery, 306062 1800mah | 1 | 1-cell batteries up to 3mmx62mmx62mm should work |
Non-rechargeable option:
For this option, print the non-rechargeable bottom plate, and do not print the base midplate.
| Item | Quantity | Notes | | --- | --- | --- | | 5v USB breakout | 1 |
Printer:
FuseBox2R
Rafts:
No
Supports:
No
Resolution:
0.1-0.2
Infill:
15-25% (100% for TPU parts and fan blades)
Filament:
Any PETG/PLA/ABS, TPU
Notes:
It's highly recommended to print the motor pinion and main shaft gear in TPU for noise reduction. Everything else can be printed in a normal rigid filament, like PLA, PETG, or ABS. A lot of these parts have steep overhangs, so go slowly (especially for the blades) and use adequate cooling.
There are multiple motor pinion tooth counts included, allowing you to fine-tune the motor to main shaft gear mesh. I've found that a larger motor pinion results in reduced noise, so try to use the largest pinion that doesn't result in too much friction or motor load.The main shaft screw includes a tight and loose version. Generally you should use the tight version, especially if printing in TPU; only use the loose version if it won't fit into the rear bearing.
Finally, it's likely that the blades will need to be balanced. A good way to do this is with pieces of electrical tape; you may need to try out different tape placements to get the part sufficiently balanced.
License:
Creative Commons — Attribution
AlexY
