Fanbox for Printrbot Air Nozzle System

by moltenplastic, published

Fanbox for Printrbot Air Nozzle System by moltenplastic Aug 20, 2012
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(can be used by any 3d printer)

This fanbox has a mount for a 21mm x 25mm dc motor with a 2mm x 9mm shaft. This fanbox was built to be placed inside a Printrbot Power Tower with a 3/8" clear tube attached that leads to a nozzle on the print head which you aim at the molten plastic from within the printer build platform.


Do NOT forget to download the front and back. The back has a mount for the motor and the front is needed for proper airflow.

Print all pieces of the box; add a dc motor such as:


(I am not affiliated with the above link)

Afix the unit inside the Printrbot Power Tower (you need to drill a hole to allow the 3/8" tubing to leave the power tower)

Run the clear tube from the power tower to the printer, and then plug in the angled nozzle which you then aim at the heat bed. You would zip tie the nozzle in place.

I adjusted a few things, the nozzle now comes with the main component.

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Are those printed fan blades inside the fan box? I guess they must be, as how else would the motor push air through the box, but from the look of the images they seem connected to the housing and wouldn't spin freely. Maybe I'd better just download and try it out. Are you finding that this printed fan with motor works as a reasonable replacement for a commercially-bought PC case fan? 

I guess the motor would run just fine from any 5V line on the Printrbot's PC power supply?

Is anyone using this fanbox?