LED illuminated BMG Extruder fan housing
Description
This is a quick fit / release version of the Seckit Go fan housing. It is essentially a remix / copy of the version I have been using for months that was created by dreadnought_strength. It is being used on my Seckit Go 350 printer, but the design is flexible enough due to the mounting arrangement, that it will be almost a universal fit to any printer with a BMG extruder. Mine is a BMG clone. The original fan duct works really well, but is awkward and time consuming to mount and dismount. I wanted to create a version that I could install and dismantle from the print head in seconds. This redesign has made clearing blockages and dismantling the hot end a 3 minute job, rather than one that used to take 30 minutes. One other advantage of the design is that the outlets from the fan can be positioned at exactly the right height, relative to your printing nozzle, by sliding it up and down the extruder body. I have also extended the outlets rearward to coincide more with the centreline of the nozzle. The fan duct is designed to fit over the extruder body with rearward wings designed to prevent sideways motion. It is held in position by springs or cable ties back to the extruder support plate. I show both options in my photographs. I use springs because the appearance is, in my opinion, neater. I bent the springs up from some old A4 folder paper retaining springs. When in position it is very stable, does not oscillate during rapid moves or cause print artefacts. The design has been arranged so that the whole unit can be printed without slicer generated supports. (I hate the process of removing supports). Some in-built supports are provided for structural reasons during printing in the fan mouth opening, but these are extremely thin and can be removed in a few moments with a sharp knife. I have included a rear hole and wiring channels for users who like a bit of bling to add a 5mm LED into the body of the housing. This has been done without compromising air flow. The fan housing when printed in clear filament looks pretty cool in the dark. I powered my blue LED from the RAMPS board. .
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