Vertical lines through colour print.

Joined
Aug 6, 2019
Messages
18
How do I prevent the vertical lines through the picture. I have tried all the normal maintenance functions but they continue to appear.
Epson XP900 Expression Premium.
img20220323_15261738.jpg
 
Last edited:
Joined
Jul 11, 2020
Messages
134
Looks like some jets are clogged, certainly in your magenta. There is something odd going on with your yellow too. Can you do a print head nozzle check and post it?
 
Joined
Jul 11, 2020
Messages
134
The good news is that it looks like you have no clogged jets. The bad news is, as you can see, that there has been some cross contamination of black into your cyan and magenta at least. I don't have an XP900, so I don't know its inner workings specifically, but most Epsons have a print-head parking position that puts the heads into a kind of rubber cup that is supposed to prevent air from getting in and drying them out. When there is a lot of loose ink in the printer then this cup can get contaminated with ink. Once it's contaminated it acts as a spot where ink can backflow back into the other colours.

What creates a lot of loose ink? Head cleanings and borderless printing. Head cleaning is obvious - it intentionally pumps ink through. Borderless printing creates excess ink because the printer starts printing slightly before the edge of the page, and that ink has to go somewhere. The head cleaning mechanism generally includes a rubber squeegee and a soaker pad to absorb the ink from head cleanings, but when it's saturated then it leaves ink on the surface of the head, which then gets into that rubber parking cup. There is generally a strip of sponge under the print head track to absorb borderless printing ink, but often some ink gets left on the head and can end up in other places.

What to do: First of all stop all head cleanings and all borderless printing for now. Use LibreOffice Draw or some such program to create a test print page, like what you were doing, but make it blocks of pure Cyan, Magenta, and Yellow only. You need to get the ink that has back-flowed into the head back out and onto paper.

You will likely need to do some cleaning. This requires some judiciousness. You need to get the print head off its parking position - I don't know the firmware of that printer well enough to know exactly how to do that. Most Epsons have a button you can press and hold down for that. Look yours up. Sometimes you need to use a bit of force, but this is where the judiciousness comes in because some heads lock in the parking position and you don't want to break that. You want to get the head off its parking position so you can get in there with cotton swabs and get the excess ink out. Some cleaning fluid will do you well. I make mine with 1/2 cup 95% denatured ethanol, 1/2 cup of glass cleaner, 1tbsp amonia. If you can find the rubber parking cup and cleaning squeegee make sure you clean them until a cotton swab with cleaner doesn't come back with any ink on it.

Sometimes you can get some of the soaked in ink back out of the soaker pads with paper towel and make them absorbant again. There are also videos on how to replace the waste ink pads for that printer. There may be some videos for what I've described above too.
 
Joined
Aug 6, 2019
Messages
18
Thank you so much for your prompt and comprehensive reply. I notice that so many people who post, never get a reply and I know how frustrating that can be.
I am retired now but I serviced video equipment, VCR's, Cameras, CD and DVD players, Tape decks of all types and other bits and bobs for fifty years but never printers so I do understand the logic and the commonsense of your reply. I have stopped head cleaning and borderless printing and I am exploring the inner workings in regard to the latter part of your explanation. When I have conquered that I will advise of my findings, Until then, I thank you.
Maybe the Force will be with me.
David.
 
Joined
Aug 6, 2019
Messages
18
Hi VA1DER,
It has been some time with blood, sweat and tears but I am glad I posted and read your reply and remedy. I read most of you replies as they appear to offer good advice, at least in my case in sorted the problem.
What a procedure to do a good clean but after many tissues, paper towels cotton buds lots of cleaning fluid and other stuff it all came right. What a mess with cross contamination of three colours (Kiwi spelling) and sponges soaked with ink. After the clean up I set things up and the printer is better than new, well almost. So thanks again and I will follow your advice and see if it stays good.
Regards.
David.
 

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