Banding issue

[Grandad35]

Is the yellow really that light, or wasn't your scanner able to pick it up?

The dye black (BK) looks strange, but that could be an aliasing problem caused by the dot spacing and the scanner resolution. Could you rescan at a much higher resolution (say 1200-2400 dpi), crop out a section of the BK showing the intersection of where the pattern changes and post it?

 

[lin]

The 'BK swatch' that you called it as at post #9 is due to the scanning resolution just as Grandad35 had pointed out. Such 'swatch' color is very common when people scan their nozzle checks print. You need to play around with your scanner setting to try to get the best images so that Grandad35 can help you after looking at it. As the forum will resize the image if it exceed certain file size, you need to check whether if your uploaded nozzle check image resolution has been affected such that it become less visible or blurish.

I am surprise that leo8088 can see that your 'dye black nozzles' has clog based on that poor resolution in your nozzle check printout you posted #7.

As per turbguy has mentioned if there were missing or distorted line/grind, those were the area you need to look into and identify what are the actual cause to resulted the problem.

This 'little skewed on top ' for PGI-5BK which you mentioned at post #7 is normal.


You could also try print a service test print where it will display a more detail nozzles check pattern. A typical service test print looks like this


You can then crop and edit with some graphic editing software so that it can display the nozzles check pattern in better resolution.

 

[panos]

Have you tried a manual head alignment (including a vertical alignment) ?

 

[mrelmo]

ok here is a cropped nozzle test that was scaned at 1200 where can i find a service test print, i hope this scan can help

 

[Grandad35]

That image doesn't show the pattern that previously appeared, but it is still only 320x69 pixels. Is the pattern uniform as shown in the last image, or does it look like the original image?

I'm going to guess that you selected the "Resize Image" option when you uploaded it, since that will resize it down to 320 pixels. Can you re-post it, but without the resize option? What is the size of your original file? If it is < 100KB, it won't be resized when you upload it. If it is > 100KB, it will be resized to 640 pixels wide. Since the latest resized image is only 3KB, you have lots of room to make it bigger.

You might also want to adjust the scanner's settings to increase the contrast on that part of the scan before reposting.

 

[mrelmo]

UGH i did resize it lets try this one, if it doesn't help i will rescan (adjust contrast) and crop a bigger section

 

[Tin Ho]

Your original picture was much larger and only the dye black patch showed a problem. If it wa a scanner aliasing problem it would have shown the problem on all dye color patches too. You are the owner of the printer. You can look at the nozzle check yourself and see if the dye black patch is in perfect shape. Compare to what you posted. You can tell if the posted image is or is not the same as your original. It looked to me that it was not perfect. It looked like 8 step cases. It looked more like a print head problem than a scanner aliasing pattern to me.

 

[mrelmo]

ok i think this should explain alot, the 3 attachments are 4x6 #1 is standard print quality on plain paper, #2 is High print quality on plain paper and #3 is high print quality on glossy, the banding is showing up on the plain paper stanard quality, once i went to high quality on either paper the banding disappeared, not completely on plain paper but decent, on the glossy there is a very minor verticle branding if you hold the paper at just the right angle for the light to hit it, if you look at it straight on it is not detectable, as always comments from the forum are appreciated

 

[lin]

Your original picture was much larger and only the dye black patch showed a problem. If it wa a scanner aliasing problem it would have shown the problem on all dye color patches too. You are the owner of the printer. You can look at the nozzle check yourself and see if the dye black patch is in perfect shape. Compare to what you posted. You can tell if the posted image is or is not the same as your original. It looked to me that it was not perfect. It looked like 8 step cases. It looked more like a print head problem than a scanner aliasing pattern to me.

Tin Ho, you are very knowledgeable. I hope to increase my knowledge. Since you said it's not a scanner aliasing problem, probably you can help explain why after he adjusted his scanner setting to improve on the resolution, his dye black nozzle check images at post #14 & #16, no longer display the color patch or 'Bk Swatch' which he called at post #9?

If you do ever read post carefully, you would have realized the owner of the printer already described at post #7, his 1st scanned nozzle checks printout as look good and clear to him. However his scanned nozzle check image, the dye black displayed this 'BK swatch' or color patch.

printer is in standard print mode, here is copy of the nozzle check, it looks good these checks have always been a little skewed on top which i didn't know what to make of but the nozzles look clear

Obviously, there were problem with his printhead/clog/ other causes etc, for which he doesn't know how to interpret from his nozzles check, otherwise he wouldn't have report of his problem.

Most people would have opted for plain paper setting when printing a manual. For ip4200, that would have use the PGI-5Bk cart instead the CLI-8BK cart. Of course, there will always be some people who probably for whatever reason may select other photo setting setting to print a manual. But my guess when I first read his post would have been, he had selected plain paper as the media type when he printed his manual. So the dye black wouldn't be the actual cause of his problem. But unfortunately his nozzle check printout is really not clear for Grandad35. And he doesn't explicitly say whether he had opted for plain paper setting or photo setting to print his manual where he first reported of his problem.

Even if his dye black nozzles check were clog or had other printhead problem, they would had appeared as streaky, white horizontal line, missing line, lighter color, missing color, 1/2 banding color, irregular color etc... but appearing in the form of rainbow patch colors??????

I really like to hear your explanation why his dye black nozzle check doesn't appear physcially to him having color patch/'BK swatch'(rainbow patch color) when he was holding the nozzle printout ( refer to post #7 ) but only appeared when scanned and posted since afterall you said it was not scanner aliasing issue. I hope I can gain some understanding and learn from your knowledge.

 

[Tin Ho]

Lin, I did not say it was definitely not a scanner aliasing problem. If you read my 2nd post #17 again you will see I only suggested that it was not. That's why I also suggested that the original author to compare the actual nozzle check print with what is seen on post #9. If they look the same or very similar it confirms that it is not a scanner aliasing problem. If you still don't get it read the #17 post a dozen times. I hope you will get it then.

As you said, obviously the ip4200 print head has a problem. The nozzle check is a utility Canon provides for diagnosing such problems. Now that the first nozzle check scan the author posted showed that only the black patch was crooked, isn't that a good indication that perhaps the black is clogged? Do you actually mean to suggest that it is Y or C or M that is clogged rather, because the problem of the black patch is a scanner aliasing problem. Remember, the author reported having banding on black. That doesn't take a genius to guess that the black is clogged, does it? The first nozzle check scan shows good Pigmented black, CMY patches but not the dye black. Please tell us if it is not the black what is it that is clogged or defective?

The author reposted the black patch that was scanned at higher resolution but the image posted are much smaller.

This is the author said in post #7: "printer is in standard print mode, here is copy of the nozzle check, it looks good these checks have always been a little skewed on top which i didn't know what to make of but the nozzles look clear"

But apparently you think he said he did not see the rainbow patch color when holding the nozzle check print and it only appeared when scanned and posted. I guess you can read his mind some how. Or do you need to read it a dozen times and think about it again? I do not see anything suggesting the crooked black patch only appeared when scanned and posted.

By the way, on ip4200 Y and BK have a same number of nozzles. It seems if scanner aliasing occurred on black it would have occurred on yellow too.