Automatic printhead alignments have been executed several times
I'm going to attempt a manual alignment later today
Yann Shukor
ASKER
Finally we had to modify the print quality set in the driver settings : standard, better, best
The users had printed for over a year using the Standard mode without any issues
Apparently now we have to print in Better in order for these vertical lines to disappear
I'm going to attempt a manual alignment later today