Color bleeding issue in YM Head (Position 7)

We are currently having a strange issue with the magenta from the head in position 7 contaminating the yellow (see attached pic for reference). It's not a problem with the printhead, because if we switch the two YM heads around it still only happens to the head in position 7.

I've tried everything that I can think of to figure out what's happening, but I'm not coming up with any answers. There isn't any buildup on the carriage and I can't see anything that might be rubbing on the head that might smear the ink.

Any help would be greatly appreciated!

Dan

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Hi @danwehrstedt12992,

Can you please let u know what printer you are using, so we can troubleshoot better? Thanks!

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Latex 570. Sorry about that.

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Hi @danwehrstedt12992,

The issue is related to cross-contamination and ink mixing on the PHs.

These are the knobs/recommendations to solve it:

How to recover printheads and improve IQ:

If you detect several printheads affected, proceed with a Printhead cleaning, as that will perform a basic clean of all printheads.

If you detect any PH with several nozzles out or cross-contamination, the first step to recover the printhead is to clean the affected printhead using Printheads Hard Cleaning.

• The procedure Printhead cleaning can be reached through the front panel menu: Optimize printing quality > Printhead cleaning > Continue (see image 1)

• After performing the printhead cleaning, print the Print Status Plot again to recheck the printhead nozzles. The Area fill is a .tiff image in which the printer applies error hiding and adjacent nozzle replacement.

If there are some nozzles out but this area fill is printed correctly, the printhead status is OK. Here you can check any cross-contamination in the yellow area fill you are facing (see image 2).

• If after this cleaning procedure, you are stills facing the issue, you need to perform a manual cleaning of the PH or PH’ affected.

• The procedure of Printhead manual cleaning can be reached through the front panel menu: Ink > Printheads > Replace.

• You should extract the PH and clean it manually with a fiber-free cloth with distilled water and let the printhead sit on it for a couple of minutes (see image 3).

  IMPORTANT: Never put in contact optimizer/pretreatment ink with other printheads.

If you have many nozzles in the same raw there could have been cross-contamination with pretreatment/optimizer caused by a carriage crash.

Finally, re-insert the PH/PHs again and check the performance by printing a Print Status Plot.

• You could also have many nozzles in the same raw from cross-contamination with pretreatment/optimizer caused by a carriage crash.

Check that the fabric of the maintenance cartridge is not damaged or has any wrinkles. In case it has happened, the fabric should be tensioned and passed a few millimeters.

• As a final step, if the result is not acceptable, proceed to do a Printheads hard cleaning. The Printheads hard cleaning can be reached through the front panel menu: Optimize printing quality > Advanced Calibrations > Printheads hard cleaning > Continue (image 4).

In the following step, select the affected printheads and press Continue to perform the hard clean for the selected printheads (image 5).

• After performing the printheads' hard cleaning, print the Print Status Plot again to recheck the printhead nozzles/area fill zones. If the PH or PHs are not totally recovered, they should be replaced by new ones.

If after following all these recommendations, you are still facing the issue, I would suggest contacting your support representative for further support.

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