RepRapGuru Cooler Kit

thingiverse

I learned the hard way that when printing ABS, turn off the fan completely. It was causing part curl at the end of the print. --- Update --- I installed a 10uf capacitor across the (+) (-) terminals and it significantly reduced the motor noise. For kicks, I tried a 100uf cap, and lost the ability to adjust the fan speed, it's like Ramps wanted to push the fan 100% on with no speed control. So somewhere between 10uf and less than 100uf should be perfect. A picture is added. This is a mashup of three existing "things", using parts from which as a print cooler that works well with the RepRapGuru hot end assembly. Print these three things and add to it a 5015 12v blower fan. I zip-tied my clip to the extruder motor for extra security. Note: this produces a lot of airflow... enough to affect print bed temp and make the printer work harder to keep the print head heated. You'll want to experiment with the fan % in your Slic3r config. I wonder if a 24v fan would work better since it would have lower output when fed 12v. Driving the blower motor at ~30% works nice, but it's really loud. I'm going to put a 10uf capacitor across the fan power leads to try and quiet it down. PWM is so noisy.