Hp Latex R2000 Plus Printhead Issues

[toddlitwiller]

I am getting alot of horizontal banding issues. I replaced all print heads and the issue cleared up but only for one day the next morning the issue is back. I can pull the head and give a few good wipes and it clears up pretty good but not like I think it should be.
Attached is a droplet check after one week on the new printheads (K is the main issue in printing). The nozzles out seem too high for 1 week of printing. Could there be an ink feed issue possibly?

******************
1 - Display printing-nozzle health data [52010]
******************

1 - Power box start
2 - Printer rearm check
3 - Verify that drop-detection has been realized
4 - Start drop-detection station electronics
5 - Display the stored data in the nozzle health database
--- Number of nozzles out in PrintingNozzleHealth ---
- PenSlot 8 Trench 2 Color WH
D(X) C_OUT
D(1) 0000
D(2) 0000
D(3) 0000
D(4) 0000
D(5) 0000
- PenSlot 8 Trench 1 Color WH
D(X) C_OUT
D(1) 0000
D(2) 0000
D(3) 0000
D(4) 0000
D(5) 0000
- PenSlot 7 Trench 2 Color WH
D(X) C_OUT
D(1) 0000
D(2) 0000
D(3) 0000
D(4) 0000
D(5) 0000
- PenSlot 7 Trench 1 Color WH
D(X) C_OUT
D(1) 0000
D(2) 0000
D(3) 0000
D(4) 0000
D(5) 0000
- PenSlot 6 Trench 2 Color Y
D(X) C_OUT
D(1) 0003
D(2) 0009
D(3) 0003
D(4) 0021
D(5) 0017
- PenSlot 6 Trench 1 Color M
D(X) C_OUT
D(1) 0342
D(2) 0043
D(3) 0269
D(4) 0052
D(5) 0505
- PenSlot 5 Trench 2 Color LM
D(X) C_OUT
D(1) 0011
D(2) 0326
D(3) 0101
D(4) 0338
D(5) 0010
- PenSlot 5 Trench 1 Color LC
D(X) C_OUT
D(1) 0147
D(2) 0022
D(3) 0092
D(4) 0044
D(5) 0118
- PenSlot 4 Trench 2 Color C
D(X) C_OUT
D(1) 0001
D(2) 0003
D(3) 0002
D(4) 0007
D(5) 0000
- PenSlot 4 Trench 1 Color K
D(X) C_OUT
D(1) 0525
D(2) 0125
D(3) 0980
D(4) 0247
D(5) 0312
- PenSlot 3 Trench 2 Color OC
D(X) C_OUT
D(1) 0006
D(2) 0011
D(3) 0012
D(4) 0011
D(5) 0004
- PenSlot 3 Trench 1 Color OC
D(X) C_OUT
D(1) 0182
D(2) 0027
D(3) 0840
D(4) 0039
D(5) 0068
- PenSlot 2 Trench 2 Color OP
D(X) C_OUT
D(1) 0000
D(2) 0000
D(3) 0000
D(4) 0000
D(5) 0002
- PenSlot 2 Trench 1 Color OP
D(X) C_OUT
D(1) 0000
D(2) 0001
D(3) 0021
D(4) 0000
D(5) 0001
- PenSlot 1 Trench 2 Color OP
D(X) C_OUT
D(1) 0000
D(2) 0000
D(3) 0000
D(4) 0002
D(5) 0001
- PenSlot 1 Trench 1 Color OP
D(X) C_OUT
D(1) 0002
D(2) 0000
D(3) 0342
D(4) 0008
D(5) 0009

 

[balstestrat]

Ink feed issue....probably not. Easy to check if the air pump is running all the time or just periodically. You basically can't have issues in multiple color lines unless you have an issue with the air pump.

Are you sure the drop detector is working correctly? I would reset the drop detection database and instantly after that print the nozzle check. How does it look?

 

[toddlitwiller]

Ink feed issue....probably not. Easy to check if the air pump is running all the time or just periodically. You basically can't have issues in multiple color lines unless you have an issue with the air pump.

Are you sure the drop detector is working correctly? I would reset the drop detection database and instantly after that print the nozzle check. How does it look?

After doing the reset and immediately doing the detection there are 0 nozzles out on any of the heads and the print looks great but after the print I get this primer error. Run the diag 88002 and all pass.
any thoughts on this?
Thanks

 

[balstestrat]

I can check this but Im pretty positive you don't have to worry about that. It's complaining about the OC PH primer but new printers won't even have the primer. If you are on newest firmware you can just leave or disconnect the primer.
However check that the OC latch is completely closed.

Anyway it would mean that you have a problem with the drop detector.
Don't look at the results after resetting the database because it will show 0 for everything until the machine has done 3 succesfull detections.

That's why it's best to print out the real nozzle check from the hard cleaning menu and you will know how your printheads perform for real.

Honestly sounds like something quite "simple" that technician should have been able to figure out in an hour (on-site). Hopefully the old heads had some wear so you didn't just waste 3k on new ones.

 

[johnnysigns]

Going through the same thing with our R2000. Our drop detector needed replacement. We got a new one installed, but didn't shim it correctly so it took a little tweaking to get right. We still have issues with our overcoat levels during cleanings and the banding it's producing during anything 8pass or less on dark color coat outs.

- 52010 - Display printing nozzle health data (to see current values; for comparison to next steps)
- 52011 - Reset printing nozzle health data
- 52010 - Display printing nozzle health data (all values should be “0” now)
- 52001 - Check DD electronics
- 52002 - DD Functional Test
- 52005 – Force drop detection (execute 3 times)
- 52010 - Display printing nozzle health data (all values should be “as expected” now, barring head issues)

 

[MGB_LE]

My vote goes To the OMAS sensor “optical media advance sensor“ That may be causing it and also the drop detector.

 

[SignGuy1990]

Check the cables and the female connectors at the main board. Our printer had poor connection and bad cables causing intermittent issues, we thought it was due to bad cleaning or defective printheads. new cables solved it.