GeeeTech A10M Priming GCode!

The GeeeTech A10M is what’s referred to as a “mixing” printer where unlike the ZoneStar which has two hotends, it has only one yet two extruders. The result is the mixing of the filaments in the single hotend using a virtual tool or hotend concept. This is achieved in the Marlin firmware through the use of the M163 and M164 comments to define the mix with the M163 command and then implement the configuration a virtual tool index with the M164 definition (i.e. M164 S0). Below is a prefix GCode snippet to prime both extruders at 50%. To change the mix, simply alter the “P” values in the M163 code lines, however note they must add up to be “1”.