March 22, 2020
Description
Have just bought a Geeeteck A20 and needed to upgrade the pitiful cooling fan. I really like the 5015 radial fan so made this duct. Its a no frills, simple to fit, effective cooling duct. You will need to trim the bottom of the hot end cage to allow clearance for the limbs of the cooler to fit around the nozzle. Its quite tight under the hotend of the A20 so I fitted a wrap of cotton pad to avoid the hot end melting the duct, im not sure but would guess the silicon sock would do the same job. I have gone for more airflow rather than try to point at the nozzle, my thinking is the part is always moving so will be in the airflow very shortly after being printed. Im using cable ties but screws would be a better option.
<< UPDATE >>
I found the cooler to work well enough but the air flow seemed to scoot straight pass the nozzle and exit under the touch probe so a lot of the cooling effect was lost.
I have uploaded a second cooler with shorter limbs that end at the nozzle, I also removed the curve at the end of the limb, now this seems to cause more turbulence and the effect is a more vertical flow of air. I have left the original file as some might want to try but the MK2 is more effective.
License:
Creative Commons - Attribution