Battery Powered Portable Fume Extractor

thingiverse

I was looking for existing fume extractors for a PC case fan I had lying around, but none fit exactly what I needed with my available supplies. So I designed this in an afternoon. This is a snap-fit case requiring no screws or gluing. The unit is powered by three 18650 batteries (which can be sourced from old/dead laptop batteries) and is completely wireless, keeping workbenches free of tangles. It also makes the device portable and ideal for in situ jobs in tight spaces. Bill of materials (non-printed): * An 80x80x20mm fan capable of running at 12 volts * An 80x80x9mm piece of carbon filter, optional but recommended * A 20x15mm rectangle rocker switch * Three 3.7-volt 18650 battery cells wired in series for 11.1-volt nominal * Wire (I used salvaged copper wire from scrap power cables) * Tape, optional but makes assembly easier Print Settings: Printer: Rigidbot Regular Rafts: No Supports: No Resolution: 2.5 Infill: 15 Notes: My first test print was at 15% infill and it worked fine (apart from the delamination and brittleness I get from my poor quality ABS spool). My fan guard actually stuck to the bed so hard it snapped off when I removed the rest of the part. This shouldn't happen with regular ABS or PLA, but I might need to make that part thicker.