It's not my printhead that move but my bed.
And the 1st extruder can reach (0,0) to (200,200)
And the 2nd can reach (0,0) to (150,200)
So theoricaly i can print in area from (0,0) to (150,200) on my bed
But cura automaticaly cut the bed from both side when you enter the nozzle offset.
My point is: it's possible to cut just one side of the bed or adjuste the setting in cura ?
I can print with REPETIER but i don't have all the option given by CURA 2.7 and it's really furstating.
And no, i can't bring my extruders closer !