Last week I re-installed my piezo pro system into a P400. I haven’t been able to get a decent test pattern since the install. In the past, I’ve had similar problems swapping the PK/MK inks, but those have always resolved with a few cleaning cycles and/or sitting overnight. I’ve been troubleshooting this for a week with essentially no progress. I found many forum posts on clogged heads, but none of them addressed this particular issue, or proved very helpful.
The printer is a refurb replacement for a failed unit. I have been running it with the OEM carts for several weeks. The refillable carts were stored upright and double-bagged in ziplocks for about 6 weeks while Epson processed the replacement and I ran/tested the new unit with the OEM inks. All was well and I got a perfect test page right before swapping in the refillable carts. The attached image is pretty typical of what I see now, though it’s actually a pretty good one, relatively speaking. The really frustrating thing is that the patterns are very inconsistent and running cleaning cycles sometimes seems to help, but just as often, makes no difference or makes things worse.
Other details and things I’ve already tried:
tapping/flicking the carts to dislodge air bubbles
priming the carts with the priming tips
running many cleaning cycles (probably a total of 30 or more at this point)
cleaning the printer according to all the steps in this older IJM video. Flushing the print head using the dummy cart did help one channel (MK in the attached pattern) but I did the Y and M channels at the same time and you can see the results there.
Any help or suggestions are most welcome! It’s been a week, so I’m beginning to worry that if clogs weren’t the problem initially, they may start becoming one soon.