Fan Duct for Prusa Mendel Longboat

by Danjhamer, published

Fan Duct for Prusa Mendel Longboat by Danjhamer Apr 15, 2012
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I have a Prusa Mendel Longboat. It has an aluminium X carriage and J head nozzle hot end. I couldn’t find a duct that would fit so here’s my version to fit the Longboat.
If accommodates a 40mm x 40mm fan and will clamp on to the edge of the aluminium plate.

I’ve also designed a MOSFET controller to control the fan using a Sanguinololu with Sprinter firmware.
Schematics, instructions and firmware modifications to follow.
See http://www.thingiverse.com/thing:22202


I printed it with a 0.5mm nozzle and 0.3mm slices in Slic3r. I did have to add some support structure manually as I can’t seam to get Slic3r’s support material to work.
I’ve included stl’s both with and without supporting structures.

You’ll need 6 nuts and screws, 2 M3 and the others to fit your fans mounting holes.

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I'm hoping to adapt this design for my Mendel90. I'm really looking forward to seeing your electronics and firmware modifications too.