MK3 Door Cover for 40mm Fan - Cooler Stepper Drivers

prusaprinters

<p>This is a replacement electronics bay cover with holes and a vent for a 40mm fan. The same kind used for the hotend cooler. I found my Trinamic drivers were getting too hot when running my printer in an enclosure, so this was my solution.</p><p>If you're using the same 5V 40mm fan as the one used for the hotend, you can splice in the extra fan to the same connector. Just don't attach the yellow/white tach wire. Only one fan should be connected to that signal wire (probably the hotend fan). This will turn on the electronics cooler fan when the hotend is on.</p><p>I also stuck some small heatsinks on the Trinamic drivers. You can find these labeled “Raspberry Pi heatsinks" or similar on Amazon. Just any small heatsink with adhesive.&nbsp;</p><p>I also shrank the size of the exhaust vents on the front closer to the fan intake, to prevent it from recirculating exhaust hot air.</p><p>When wiring your electronics, be sure to loom the wires along the sides of the electronics bay to make sure the Trinamic drivers have good air flow.</p>