Any idea what could be causing these random vertical lines?
Epson 60600 using Onyx Postershop 18
We have seen these kinds of lines caused by 2 different reasons:
-Static (static charge causes the head to fire in a random manner, and often only affects random selective nozzles) More likely to happen with polypropylene, but can also be the case with vinyls that have a production fault
-Cable fault - either loose contact or broken cable (at one install we found a loose cable and tightened it)
Of course, there can also be a head fault, but since the lines are rather long, it means a nozzle is firing constantly at random times.
Isolating the fault to a specific head would mean it is the head or a cable controlling that head. If it is not head related, then static or cable would be more likely.