Plugin fan duct for half stepper by Bram1982

Last crawled date: 3 years ago

Created this fan duct for everybody who modified their Flashforge or similar printers to a single extruder by using this half stepper thing.http://www.thingiverse.com/thing:551916
My fan duct works when you DO NOT switch the extruder elements around. It plugs in where the left extruder was. No need for screws. Just plug and play.
The reason I made this is when you do switch the extruder element around as required by the half stepper thing, the extruder gets very close to the plastic carriage that supports the whole assembly. I was afraid things will bend or melt because of the heat!
By leaving the right extruder in place and not switching it with the left extruder, this is not a problem anymore. But then the supplied fan ducts with the half stepper don't fit. So this is where this model comes in.
I also had various other fan ducts melt / deform already because they were very close to the extruder and were very thin. This one has not melted yet. Do NOT print this with PLA, because PLA has a low melting temperature. Also use a high infill, like 85%. The more solid the fan duct, the less likely it will melt due to extruder heath.
On a sidenote:
Just using the main part of the 'half stepper' thing worked fine for me. Didn't need the extra parts. Also I used the original screws to secure the left heatsink by just screwing them into the main plastic part. Since the screws are so long, the have plenty of grip in the plastic.