![]() ![]() All info I found entailed using the extender in a two-extruder scenario meaning disabling the controllable D9 fan, which I did not want to do. I bought the extender and found it really hard to find some usefull information, where most of the information was old and dreprecated and also had various degrees of errenous info like wrong pin numbers. I am using the newest (As of 20th may 2015) iteration of Marlin firmware and run it on an Arduino Mega + Ramps board configured as EFB (Extruder D10, Fan D9, Bed D8). We will retain the ability to control the D9 fan using LCD or the M106 Gcode for the printer-bed as standard. In this Instructable I'll demonstrate how to install and configure Reprap Ramps1.4 RRD Fan Extender to make it possible to add a temperature controlled fan for your extruder (hotend) and a fan to cool your drivers on the Ramps board only when a driver is actually active.
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