FuseBox 1515 hot end blower nozzle

thingiverse

The front edge of my prints were popping off prematurely, and I suspected excessive cooling from the fan was the culprit. I ran a SolidWorks flow simulation on the part, and there it was! http://prntscr.com/b9ldv1 - I am redesigning the fan to focus air on the top layer of the print and slightly below. Assuming you turn on the fan around layer 5 or so, which should correspond to about 0.5-1.5mm. This model allows you to interface a 15mm thick blower onto the FuseBox 1515 carriage (http://www.thingiverse.com/thing:1047193). Please note that this will eat up some of your maximum Y travel, so adjust your software endstops accordingly. Additionally, I've featured a small nozzle to help cool off the extruder's bottom heat sink fins. As for printing this model, PLA works just fine. Bridging is required until I can make it nicer. The interface plate needs to be flipped upside down or you'll have a bad time. SolidWorks files are available for anyone interested; they're not super clean yet, so I haven't uploaded them yet. I can modify this design to work with a 20mm thick blower, but it's really too much airflow. A 15mm blower is powerful enough with this nozzle design. This fan model was based on the one I linked: http://www.amazon.com/Connector-Cooling-Blower-50mmx15mm-uxcell/dp/B00MJU6JR2. I created this model by measuring the fan, so I can't guarantee it'll fit other fans. Maybe I'll make one with a slot that will fit several angles. I strongly recommend placing insulation around the nozzle block as the fan is powerful enough to drop the thermistor temperature and trigger thermal runaway in the firmware.