I would like to slide the motor pinion side to side to either ring gear of each extruder using a solenoid or a mechanical fork actuated by X minimum or max moves. Can the config be written to uses the same motor for extruder 1 or 2. If so a coding example would be a big help
Maybe you could do it with just an M42 in the G code. See [reprap.org]
If you need to switch directions, it would be a bit more complicated--maybe you could hook a NAND gate to the pin and the extruder direction, and still get away with no firmware mods.
