I've been wondering how to do this and finally found something!
http://captain-slow.dk/2011/10/28/sprinter-m42/
Using RAMPS and having dual extruders, pin 9 will be used (I hope) for the second hot end instead of fan control. So a new output pin will need a MOSFET for a fan control. It would also be nice to turn on and off the lights on the printer with custom buttons on pronterface.:cool:
http://captain-slow.dk/2011/10/28/sprinter-m42/
Using RAMPS and having dual extruders, pin 9 will be used (I hope) for the second hot end instead of fan control. So a new output pin will need a MOSFET for a fan control. It would also be nice to turn on and off the lights on the printer with custom buttons on pronterface.:cool: