HP Print Issue

[untitled]

Printing this file, it's start out fine then ends up having all this bleeding around the edges of the black letters. Nice and crisp clear on the first row of prints, second row around the top it starts looking like this. What in the actual eff is going on here?

HP 700
-Did a nozzle print check. A couple of the print heads was missing some lines and wasn't looking great.
-Tried manually cleaning the one print head since it was at point of replacing it anyway. Never got better so I just replaced it.
-After manually cleaning the one head two others came back and said to reseat. Could no longer reseat them after trying many times and cleaning the connections. Ended up replacing 4 print heads and the test printing was looking great.
I seemed to have fixed the issue so I go to print this job again and it start doing the exact same thing. Can anyone tell me what is happening here?

I am going to reinstall flexi, because that always seems to be the problem when I have weird problems like this. But would be great if someone else maybe had an idea of what is going on.

 

[P Wagner]

Run the Optimizer Printhead Depletion Plot. It is possible that the Optimizer printhead is losing a significant number of nozzles mid-print, resulting in ink bleed on the media.

 

[cornholio]

We had issues on several printers with air in the OP IT. You can weigh the failing printheads to find out. If it's less than 65g, you have air inside.
We take out the IT block, turn it over and suck out the air with a syringe. (Late 700 models don't have IT's for colors except white anymore)
Another issue the found about OP starvation is static. The remedy is grounding the feed drum.

 

[balstestrat]

Yeah optimizer ph or missing drive roller grounding plate that should be installed.

Hope you didn't touch Flexi yet for nothing.

 

[netsol]

We had issues on several printers with air in the OP IT. You can weigh the failing printheads to find out. If it's less than 65g, you have air inside.
We take out the IT block, turn it over and suck out the air with a syringe. (Late 700 models don't have IT's for colors except white anymore)
Another issue the found about OP starvation is static. The remedy is grounding the feed drum.

we have a syringe for our designjet t1700 designed for just that purpose

never had to use it yet...

 

[netsol]

they call it a "recovery kit" i think

 

[untitled]

Thanks everyone for the replies. It was related to the optimizer. I did the depletion test and could see it right away. I pulled the print head and put it back in and started printing again and it worked fine. I'm assuming air in the line and the printer pushed through more optimizer to the head when I put it back in and now it's working. I'll still get a new print head for next time it happens. Again THANK YOU all for pushing me in the right direction. I should have posted something before replacing all the other heads that I did. But then again they needed to be replaced since I was starting to see some very light banding.