Epson 7900 printer problem

InkjetMall Customer Support Printer Maintenance & Cartridges
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21

Thanks for all your help Dana.

22

You are very welcome, I hope everything goes well! :slight_smile:

23

Hi Dana,
I’ve started doing a yellow channel flush on my 9900 and it is taking forever. I have stretched the patch color so that I can print it on roll paper 36x10, and I bet I have made 25 prints so far. It is starting to turn orange, so the flush is getting in but there are a lot of gaps so I guess it is putting very little ink down. Do you have any suggestions, or do I just keep on printing? There is very little change between each print. I plan on letting it sit for 48hrs once I know that the flush is all in.
Thanks
MIchael


24

I see you purchased a 7900 Yellow refill cart and PiezoFlush, so assume you’ve installed the flush cart in your yellow channel to flush that line. Are you printing yellow images thru Photoshop and the Epson driver, or using QTR Calibration Mode following our instructions to flush an individual channel?
The pattern you attached above shows what looks to be a mixture of yellow ink and PiezoFlush, but has banding/missing nozzles.

~Dana

25

I am using the QTR Calibration Mode, and have been following all instructions. The pattern is what concerns me. I think the flush has reached the print head, but I"m not sure why the yellow is still lingering on. I assumed it’s because it has a stubborn clogged yellow channel. Seems like I’m using a lot of paper, which is okay as long as I’m making progress. Do you recommend that I leave it sit for a while and then try again?

Mike

26

Thanks for the additional information Mike.

I believe you still have yellow pigment trapped in the damper, and possibly also the ink line. Yes, I think it would be good to let the printer sit for a while (until tomorrow would be great), to give PiezoFlush time to clean, before continuing.

Best~ Dana

27

Hi Dana,
So after working with the PiezoFlush off an on for a couple of days, I am still having issues. I let the printer sit with the fluid in it for 2 days and started printing again today. I still have a clogged head and when I first started printing this 36x36 patch of yellow, it was fairly pink, but then about half way down, it’s starts to turn more yellow. Do you think that maybe this is the head coming slowly unclogged? I still have gaps in the print. I’ll attach a photo.

thanks
Michael

28

It looks like you still have stubborn yellow pigment build up in the damper, which is slowly getting flushed out by the PiezoFlush. For some reason, yellow is always the most stubborn for color staining due to trapped pigment in the damper crevices. How does your printed nozzle check look?

Best~ Dana

29

It can be almost not there at times. when I run a cleaning, it comes back to the same pattern of clogged nozzles. The last print seemed to be mostly pink, but it has all the gaps in it. I was going to do a power clean on the pairs, but it says there is not enough ink,(flush cart), there is flush above the minimum line, so I guess I could use the chip setter. I thought I might turn it off for the night and try again tomorrow.

thanks
Michael

30

I wouldn’t do a power clean cycle unless the flush level in the refill cart is at least up to the first plastic horizontal support bar inside, to avoid running the cart dry, and sucking air into the ink line.

Best regards~ Dana

31

I am having the same problem with a 7900. The orange ink is low density and printing more yellow . I saw an earlier recommendation to remove and shake the orange cartridge once a week because of ink settling. Is this a common problem? All nozzle checks okay, I have done power cleaning . Ink purchased in December 2022 and installed in July . Did not notice the problem before as not printing many with orange subjects. After reviewing earlier prints did notice weak colors in orange subjects. I would like to print a calibration color chart but do not know how to find it in this site.

32

The orange absolutely HAS to be agitated every week or at least before you start printing if longer.

What has happened is you have let the orange pigment settle and you have printed it out. So there is no longer orange pigment left. You need a replacement bottle and you need to flush the line with this method:

2x 24x90 inch flush printed (on a cheap roll or throw-away roll paper) with the method above using the Orange purge image with QTR will get you back!

This is the case with all pigment inks. They have to be agitated.

warmest
-Walker

33

Thanks for the help. I downloaded the software and followed the steps for Windows. All the steps were clear and I was able to set up my printer. I am printing with a 24 in roll on heavy paper and selected 100% ink. I loaded my image that was of oranges to print. As the print started I could see that black ink was running down on the paper as it fed. I cancelled the print job. Also the small strip that printed was not the color of orange but rather black with a small amount of yellow ,purple and cyan. I decided to try with the ink set to 60% but still had excess black ink ( not running) and the same colors without any orange. I checked all the settings again to confirm I had the correct settings but now the setting ink amount was missing. Am I missing some steps. I assume the point is to print enough orange to purge the weak orange by printing large amounts of orange ink?

Mitchel Osborne

34

please share screenshots of the workflow so we can see what button needs to be switched on or off

-Walker