Dual Fan Duct for Rostock Printer

thingiverse

These two individual fan ducts for 40x40mm fans are designed specifically for the Rostock printer, one for the thermal barrier and one for cooling the print. To assemble them, you'll need the following parts: 40x40mm fans (2x), M3x16mm Screws (11x), M3 Nuts (9x), and M3 Washers (3x). I created these fan ducts because I used to have trouble with a single fan attached to my delta printer platform, which was always on and blew a constant stream of air over the print bed. Unfortunately, this caused the airstream to lift up the corners and some printed lines of my first layer, so I tried turning off the fan for the first layers. However, this led to jamming of the filament in the thermal barrier, requiring constant cooling but also a tweakable cooling regime for the printed parts. To assemble the fan ducts, start by attaching the three washers to the screws that hold them to the platform. FanDuctPart1 needs to be assembled first and then the fan can be mounted. The second fan should be attached to FanDuctPart2 before assembling it to the platform. Be sure to check if your printed bed is still level after assembly, as I had to recalibrate my printer. Here are the print settings: Printer - Rostock; Rafts - No; Supports - Yes; Infill - 100%. Note that I printed FanDuctPart1 without support and without brim. However, FanDuctPart2 is quite difficult to print, so I recommend printing it with support material and a brim. There are some regions where the part tends to warp, especially at the thin walls. After printing, carefully remove the support material from FanDuctPart2.