In the photo the paper advances from left to right. I agree that it is probably a roller or something else that is doing it as that explains why it shows up every 15mm. Now what to do about it???
These repeating marks keep showing up in one section of the prints coming from my 3880. They show up in the darker areas of the print. I don't know what to do in order to get rid of them. I am printing onto Inkpress Luster 240gsm paper. I called Epson support and they said to try raising the...