PrintrBot simple metal Blower fan conversion

*** I have added another shroud design for the Ubis13s ***

One of the best mods you can do for your PrintrBot is to remove the weak 40mm fan and replace it with a powerful Blower (Centrifugal) fan.

Blower fans are designed to pump air through ducting such as nozzle shroud, something a regular fan really just can’t do.

Cooling the extruded filament quickly will result in much better quality prints especially in areas of prints that are prone to overheating, or features such as bridges or