Wanhao Duplicator I3 Melzi to RAMPS Adapter with fans attachment
thingiverse
Go to eBay and purchase a 40mm x 20mm DC 12V Blower Cooling Fan with Two Wires. This fan is specifically designed to cool the heatsinks on your ramps. A modified version of this product has been tailored for use with the Wanhao Di3 3D printer. To remove it from its base, simply pull it down gently from above while holding it in place by the power supply. For optimal performance, ensure that a 200mm x 200mm plate is positioned at an angle of 44 degrees when printing.
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