black bars in photographs

[barfl2]

I have tried to upload 2 photos to show the problem but RED cannot upload error. I have tried tried printing a black & white picture 7"x5" approx 2" from top and bottom there is a cyan line across and in the shadow area left hand side there is alternating light/dark grey bars. (just like looking at a railway sleepers) nozzle check OK. Apart from defects in the print very good sharp image.

Is it ink flow? these look very regular and are a lot darker than the background on which they are showing. I tried a different picture on plain paper this time.Much poorer imager but the effect in the shadow side is the same. Any ideas?

Got to try to find out why I cannot upload had it a while now.

 

[PeterBJ]

Are the pictures rejected when you try to upload or are they ruined by compression?

Upload has some limitations:

Restrictions:
You can only upload JPEG, PNG and GIF files
Images above 80KB will be automatically resized to 640x480 pixels

If the images are ruined by compression, try to crop them to show only the area of interest. I have also had problems with uploading pictures. It is a good idea to use as low a resolution as possible, also to keep the compression as low as possible. If the pictures are just plainly rejected and the file format is one of the allowed formats, then I don't know what the problem is.

I use Irfan view to crop and resize my pictures to 80 kB before upload, I think that it often does it better than the forum software.

I wonder if a scan of the printout at a low resolution could still show the problem and be accepted by the upload?

I am not a master photographer, maybe others know more and can give just the right tip?

 

[barfl2]

Thanks for your suggestions I will check all the settings. The first high quality picture was scanned from the MP620 to the Laptop. the second was one of my own already on the laptop which I printed out on plainA4 paper.Both showed these black regularly spaced bars although wider on the first photo, but that one also has these 2 horizontal lines of blue across. but no blue on the print which was not scanned. When I tried to upload I browsed, found the file selected it. The File no was shown on the Forum page selected resize jpg but after a few seconds I get the RED error cannot load etc.

This happened also a couple of months ago, but as the subject was not very important I did not try again.

Just when I thought I had got this printer sorted out with the ink flow problems. Perhaps not. But this is not ink missing its lines of black segments very regularly spaced overlaying the original dark grey image below.

Anyway thanks again

 

[barfl2]

I think I have solved the problem. The nozzle check looked fine except when I looked at it closer I noticed the BK channel was a lot narrower than C/M/Y. Did 3 more nozzle checks and each time BK got slightly wider but completely solid weird what? Printed a Mono Photo on fine/photopaper/gloss settings still got banding of darker stripes.

Did another nozzle check BK looks OK but still not as wide as others. Did 1 more nozzle clean and printout. Now up to full width printed out a Black Model Engine with Yellow Numbers on plain paper A4 standard setting and it is fine.

Not yet tried a real Mono yet which will be the real test. Still unable to Upload not even nozzle checks, Same error message.

Does this narrower BK band indicate say half the nozzles were not firing or is it the inkflow problem again.?

 

[The Hat]

barfl2
I know you can explain it expertly in great detail but a picture does it better so I have laid out
a detail list for you to try this pesky upload thing again, hope it work this time.


First scan your nozzle check in colour at 72 DPI and save as a JPEG.

Bring it into an application and crop it to just show the image plus a 1/2 of border around it
and save it again to your desktop. (Like this)

Open up the Nifty site and click on Upload and set it by clicking the Browse button,
find your JPEG file and click open, it will then appear in the Browse box
tick the resize plus change it to read 640x480 (For Message Board),
now youre done just click on the Submit button.

When your image appears just right click anywhere in the Image box and copy, then open a post and just paste in your image.

Now I know you have tried it before but try it again, it has to work sooner or later, have fun..

 

[barfl2]

I hope these have arrived still could not upload the 3rd picture got the red error message again. will try again later. Anyway the difference between the first nozzle check showed the BK strip as approx. 3mm wide whereas a full one should be in the region of 5/6mm. After 5 nozzle head cleans it got close and I printed out a mono picture on plain paper and it was OK and no black bars.

So again it looks like ink flow again but because I mainly print colour the Photo BK probably does not get used very much. Nevertheless it is only 2 weeks when the head was pulled cleaned with window cleaner. It just seemed odd that the BK strip was solid in colour just narrower than it should have been,and I just did not notice it.
Durstrich again ??

 

[barfl2]

http://www.nifty-stuff.com/forum/uploads/thumbs/5268_dockside-1.jpg hopefully this one shows.

http://www.nifty-stuff.com/forum/uploads/thumbs/5268_no_1_nozzle-check.jpg Hopefully i photo and 1 nozzle check

 

[The Hat]

They did indeed work BUT
You used the Thumb instead of the Image to copy, never mind it worked and thats the important thing.

I would like to know which pigment black are you using, sometimes when youre not using the BK black it can bung up a bit
and adding photo black ink into your cartridge can help to keep it nice and clear..

 

[barfl2]

They did indeed work BUT
You used the Thumb instead of the Image to copy, never mind it worked and thats the important thing.

I would like to know which pigment black are you using, sometimes when youre not using the BK black it can bung up a bit
and adding photo black ink into your cartridge can help to keep it nice and clear..

I am using the PGI22X on the last bottle from Octoink. All the carts have been purged. Are you suggesdting adding some Photoblack to the Pigment cart?

I will eventually get the hang of uploads.

 

[PeterBJ]

Would you like to have a more detailed step by step instruction with screen dumps? While posting to another thread with an image I made some screen dumps, just in case they might come in handy.

It took me more than an hour to get upload and posting images to work first time I tried. Just don't give up. I think the images are important in diagnosing your printhead.