Thick bands on ET8550

[Harla Jean]

I have been using this printer for art prints for a little over a year now. Recently it began spitting out my prints with this thick bands. There doesn't seem to be any rhyme or reason for this... Ive done every alignment, print head cleaning, everything that is recommended. I'm at a complete loss. It mainly happens on black backgrounds, but sometimes it happens on other colors. Ill print one and its perfect and print the same image again and then it comes out with these bands and the wont stop. i need help... There about 1 inch thick. the one on the right side is always more prominent than the left. the left runs down the middle and the right is about 2 inches from that. Thanks guys.

 

[Ink stained Fingers]

That's indeed a pretty strange effect you are showing here, please provide some more details - operating system, image size, type of connection - WLAN or USB or ? What type of paper are you using ? Does the effect show up on another paper as well ? Did you change driver settings ? Since when do you see this effect - you mention 'recently' - did you do anything at this time like ink fill up - or removing paper which got stuck or ? And please post a nozzle check print.