Fan Rewiring

Below are instructions for rewiring the two 40mm fans for running at 24V. The electronics case fan and harness have been removed from the electronics case/printer for clarity.

A picture of the original Fan1 40mm fan wiring, with the electronics case fan wired in parallel with the filament drive fan. Note the wiring orientation. 1.JPG
First use a small flatheat screwdriver to loosen the two screws on top of the power connector to release the wires. 2.JPG
Once the wires are free of the connectors, snip the ends off of all four wires (just a bit past the stripped section). 3.JPG
Then strip the wires again (~1/8"-1/4"). 4.JPG
Insert the red wire from the harness, which runs to the filament drive fan, into the right socket on the power connector, and tighten the screw until the wire is secure. Twisting the wire, folding it over, and lightly twisting again may give the connector a better surface to grip. 5.JPG
Insert the black wire from the electronics case fan into the left socket on the power connector, and tighten the screw until the wire is secure. Twisting the wire, folding it over, and lightly twisting again may give the connector a better surface to grip. 6.JPG
Twist the black harness and red electronics case fan wires together. If you have access to a soldering iron, solder this joint as well. This connection needs to be very secure. 7.JPG
Cover the twisted connection with electrical tape (or, if available heatshrink). 8.JPG
To protect the twisted (or soldered) connection, use a ziptie to secure the connection to the red harness wire. 9.JPG
Snip the excess ziptie length. 10.JPG

Double check that all connections (both to the power connector, and the connection between fan and harness wires) are secure before reconnecting the Fan1 connector to the RAMBo.