After taking the printer apart and injecting PF, I was able to get VM working again. It worked fine for about 120 11x17 prints and then started banding again. 5 head cleanings have not fixed the problem, although some nozzles have always printed this time (unlike last time where the entire head was blocked). I’m assuming and hoping that another PF injection will fix the problem, but it’s a lot of work to get at the head and I’d like a permanent solution rather than this stop-gap measure.
Does anyone have ideas as to what might be causing this?
Additionally: When the dampers are off the head, is there a way to pull ink through them? It seems they seal shut unless pressurized. Is that correct?