NEW Prusament Spool Desktop Fan - USB Powered

This is a PRUSA-themed desktop fan built using an inexpensive, well-reviewed 3-speed donor fan (link below).

The original base is reused, since its tilt mechanism is smooth and reliable. A custom base extension supports the larger filament-spool-style fan grill. Two optional sub-bases are included as decorative trim. The V2 sub-base features embossed recesses that allow you to reuse the rubber feet from the original base if you carefully remove and relocate them.

The diffuser dome and fan hub are bonded to a PRUSA filament spool core and then attached to the fan shroud. The shroud itself uses tabs modeled after the original fan grill, allowing it to twist-lock securely onto the motor base.

The fan hub includes a PRUSA logo embossed at multiple layer heights, enabling a multi-color effect on single-extruder printers by pausing for filament swaps.

Bill of Materials

• Donor fan: https://www.amazon.com/dp/B09LQRBSZF

• 3D printed parts (included in this project)

• Adhesive (choose one):

  • Acrylic cement (my choice)

  • CA glue (cyanoacrylate)

  • Hot glue (easy and removable)

Optional:

• Original rubber feet (salvaged from donor base)

Print Settings

Layer Height: 0.2 mm recommended
Infill: 10–20%
Perimeters: 2–3
Supports: Varies (depending on your slicer and orientation)
Brim: Optional for larger parts, depending on filament and plate

Material: PLA works well; PETG also suitable for added durability

Multi-Color Printing (Logo)

The fan hub includes an embossed PRUSA logo at different layer heights.
To achieve a multi-color effect with a single extruder:

1. Slice the model as usual

2. Add pause(s) at the layer(s) where the logo height changes

3. Swap filament colors at each pause

4. Resume printing

Assembly Instructions

1. Disassemble Donor Fan
   Remove the original fan grill while keeping the base and motor assembly intact.

2. Prepare Base
   Attach the printed base extension to the original base.
   Add optional sub-base trim if desired.
   (Install rubber feet into V2 sub-base if reusing them.)

3. Build Fan Hub Assembly

   • Bond the diffuser dome and fan hub to the filament core

   • Allow adhesive to fully cure

4. Attach to Shroud
   Glue the completed hub/core assembly to the printed fan shroud

5. Final Installation
   Align the tabs on the printed shroud with the motor base
   Twist-lock into place just like the original grill

Donor Fan

https://www.amazon.com/dp/B09LQRBSZF

Added Dummy Spool side (modified from Dummy Spool uploaded by Prusa Research)