Thank you again for your help.
Please let me understand If I have this right.
I am building a CNC Mill - 3 Extruder - Laser combination machine using the Rumba board.
The machine is set up like this:
CNC mill, Extruder 0, Extruder 1, Extruder 2, Laser.
So
according to what you have stated, since all three extruders are
defined in firmware, both the CNC Mill and the Laser will take on the
offset of Extruder 2, the last extruder.
As I understand this, I will be required to
set an offset in the Cad software (pycam) from Extruder 2 so the CNC Mill
and the Laser will position correctly under Extruder 0.