Geeetech A20 A30 A30T A30M Dual 4020 Blower Fan Part Cooler

thingiverse

I knew what features I wanted in a fan, and the one my printer came with was aweful. Unfortunatley I couldn't find one so I made my own! This fan solution provides excellent uniform cooling with headroom to spare. It can be quickly pivoted away from the nozzle for cleaning and maintenance. It magnetically latches firmly. It needs only a few additional inexpensive parts and very few actual fixings. PARTS YOU WILL NEED 2 x 4020 Blower fans. 24v 0.1A each in this case. 2 x M2x4mm screws, you can probably re-use your existing screws. 6 x 5mmx1mm round Neodymium magnets. (these are 2 stacks of 3) 1 x 3mm Hinge pin at least 35mm long. An appropriate 3mm diameter round nail should work. 1 x Fan power splittler. (I made mine with a fan connector and some dupont connectors, heatshrink and doublesided tape.) 3 x cable ties for my example set up. Suggested settings for this hardware setup in PrusaSlicer for PLA (IMO): Fan speed min: 40% Fan speed max: 70% Bridging fan speed: 70% update: If like me you've been doing long PETG print recently, it's probably not a bad idea having this ducting printed in PETG for its higher temperature properties. I would also suggest applying a section 48mm foil tape to the top side as a heat deflector as warping may occur when the fan is idle for long periods.