Hi I recently upgraded my CR-10S motherboard to the SKR 1.3 with TMC2208 drivers, in addition, I added a 2 in 1 out extruder system, but I am unsure of how to set it up in Marlin. If anyone could provide me a list of the lines of code I need to comment / uncomment / change, or any other advice it would be greatly appreciated.
You need to change the amount of extruders in the Configuration.h:
Set 2 extruders by defining:
#define EXTRUDERS 2
Define that you have a single nozzle:
If you want to switch filament during a print, you need to write tool loading and unloading (tool changing) scripts for the slicer you use, also do print a filament prime/wipe tower that is large enough to purge the filament to prevent color mixing.