Wanhao i3 120mm PSU Fan Upgrade for Undermount

thingiverse

I needed a 120mm fan upgrade for my Maker Select v2, as the stock 40mm fan makes a terrible grinding noise every time I turn the printer on. However, none of the options, by Kozar, worked for me. This is because I am mounting my control box under the table my printer is on! So I needed to flatten the top and increased the angle on the bottom to accommodate the 120mm fan. I took some pictures of both the stock fan and it's replacement. As you can see in the pictures, the stock fan is tiny in comparison to the replacement. It moves about 9 f^3/m of air, whereas the replacement is rated at almost 70 f^3/m (at max RPM)! Even the most inexpensive 120mm fan will move around 30 f^3/m. This is an extended back cover for the Wanhao Duplicator i3 PSU (also rebranded as Monoprice Maker Select, Balco 3D Printer, Cocoon Create). This model allows you to use a 120mm fan instead of the noisy tiny internal one. The new fan will be mounted outside of the power supply, but it will be much more silent. It adds about 10mm of extra length to the bottom. I don't know if other versions of the printer have a different arrangement for the screw holes. This was designed for a v2.1 (v2 should be the same). Check compatibility for v1 and rebranded versions before printing. The stock screws won't work for this part. Use M3x8mm or longer to attach the cover to your PSU case. Screw holes aren't countersunk (just counterbored), so choose screws with a flat top.