Inlet air duct for Extruder fan MK3

thingiverse

Printing with ABS is often marred by warping due to temperature variations among layers. I've found that my ABS prints consistently warp on the left side of the heat bed where the extruder fan is located (I'm using a Prusa i3 MK3). It seemed likely that the extruder fan was generating an airflow creating thermal gradients in the ABS layers, which then led to warping. Based on this assumption, I designed an air duct to redirect the inlet flow away from the heat bed. After testing it, the results are promising - it seems to be a more straightforward solution to warping than building a housing.