Canon Pixma ix6820 printing issue

Joined
Apr 18, 2023
Messages
2
I have a Canon Pixma ix6820 printer that we use with all black ink cartridges to print transparency films for screen printing. We use Illustrator to design our art and send to PrintFab for printing dialogue. The printer always produces banding at the very beginning of the print job. Then it is fine. The top of the image is banded or faint but it resolves itself within a quarter of an inch or so. We have tried soaking the print head and running cleaning jobs from the printer itself, as well as adjusting settings to push out extra ink. Any idea why this happens or any way to prevent it?
IMG_4027.jpeg
 
Joined
Feb 3, 2024
Messages
121
Are you verifying the streams are coming out clean when you're flushing the printhead? I mean the entire length of the color channel? Sometimes it looks like the full length, but it's missing a little. Which could cause what you're looking at. However if it always happens and you've verified it's properly flowing, it could be an electrical issue in the head or motherboard.
 

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