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The + 3 to increase the value of active extruder of the three previous axis. I DONT KNOW EXACTLY WHAT IS THIS MEAN?
To me it looks like the extruders are numbered 1-2, but the actual "axis" port is 4-5. The "+3" takes care of this.
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The + 3 to increase the value of active extruder of the three previous axis. I DONT KNOW EXACTLY WHAT IS THIS MEAN?