1. Dismiss Notice
  2. Picture Of The Week (POW) Information and Submissions
    CLICK HERE!
    (if you are logged in, this notice can be dismissed using the "x" to the top right of the notice)

    Dismiss Notice
  3. Official PK Poll: Is there any future in refilling?
    CLICK HERE!
    (if you are logged in, this notice can be dismissed using the "x" to the top right of the notice)

    Dismiss Notice
  4. PK Featured Thread: A Real Cool Upgrade to Improve your 3D Printing...
    CLICK HERE!
    (if you are logged in, this notice can be dismissed using the "x" to the top right of the notice)

    Dismiss Notice

Canon Pixma MP640: Cyan not printing properly

Discussion in 'Canon InkJet Printers' started by Jedzi, Sep 27, 2018.

  1. Sep 27, 2018
    Jedzi

    Jedzi Newbie to Printing

    Joined:
    Sep 27, 2018
    Messages:
    4
    Likes Received:
    3
    Trophy Points:
    4
    Printer Model:
    Canon Pixma MP640
    I’ve got an 8 year old Canon Pixma MP640. It’s been pretty trouble free until it recently stopped printing the blue (cyan) properly.

    I’ve changed the cartridge, done 2 or 3 nozzle cleans, a deep clean, a head alignment and I’ve taken the printhead out and washed it. The deep clean and washing the printhead seemed to work when I did the nozzle check, but after I’d printed 1 sheet it reverted to the problem.

    Given the age of the printer, have I reached the end of the road with it, or is there anything else I can try?

    Thanks,

    Jedzi
     
  2. Sep 27, 2018
    PeterBJ

    PeterBJ Printer VIP Platinum Printer Member

    Joined:
    Nov 27, 2010
    Messages:
    3,844
    Likes Received:
    3,087
    Trophy Points:
    303
    Location:
    Copenhagen Denmark
    Printer Model:
    Canon iP4300 + Epson scanner
    Please upload a scan of the nozzle check and possibly also a scan of a print showing the error. To get a good scan of the nozzle check with the MP640 see this post.
     
    The Hat likes this.
  3. Sep 28, 2018
    Jedzi

    Jedzi Newbie to Printing

    Joined:
    Sep 27, 2018
    Messages:
    4
    Likes Received:
    3
    Trophy Points:
    4
    Printer Model:
    Canon Pixma MP640
    Hi there,

    I had a good go at finding that Advanced Settings tab, referred to in the post you linked to, but I'm afraid I couldn't find it anywhere, so I took a photo of the nozzle check with my decent quality digital SLR.

    The first photo shows what I got when I did a nozzle check this morning. The 2nd one, which is showing some blue, is more representative of what I've been getting.

    I've been getting similarly variable results with actual output. The output I've attached should be of a rainbow against a blue sky. As you can see, there's no blue on it. Previously I've been getting some blue.

    Thanks for your help with this.

    Jedzi
     

    Attached Files:

  4. Sep 28, 2018
    stratman

    stratman Printer VIP Platinum Printer Member

    Joined:
    Apr 19, 2007
    Messages:
    5,434
    Likes Received:
    3,589
    Trophy Points:
    373
    Location:
    USA
    Printer Model:
    Canon MP830, Pencil
    Do you use new OEM Canon cartridges, new aftermarket cartridges, or refill one of these types of cartridges?

    Magenta looks pink. Maybe it's lighting or artifact in making the JPG image. Maybe it is the ink itself if aftermarket. Crop your nozzle check images before posting if you can. Try scanning a nozzle check, crop and post. Maybe the quality will be better than those you posted.

    Cyan has worked but is variable or disappears altogether. This sounds like classic ink starvation due to poor ink flow from the cartridge. You stated you tried a different cartridge. Refer to my first paragraph and let us know what that cartridge is as well. The fix for this is a new cartridge or flushing and refilling the cartridge if you refill.

    DO NOT PRINT ANYTHING BUT NOZZLE CHECKS UNTIL ISSUE RESOLVED (or recommended by someone here)
     
    The Hat likes this.
  5. Sep 28, 2018
    Jedzi

    Jedzi Newbie to Printing

    Joined:
    Sep 27, 2018
    Messages:
    4
    Likes Received:
    3
    Trophy Points:
    4
    Printer Model:
    Canon Pixma MP640
    Hi there,

    It came out worse when I scanned it. I've retaken the two photos - the light's better now & I've cropped them, which might help.

    I've also done a close-up of the nozzle check where it's printing some cyan.

    Both cartridges are non-branded ones I bought on Amazon. I've been using similar ones for the last 8 years and they're generally well reviewed ... tho of course that doesn't mean they never go wrong.


    Jedzi
     

    Attached Files:

  6. Sep 28, 2018
    stratman

    stratman Printer VIP Platinum Printer Member

    Joined:
    Apr 19, 2007
    Messages:
    5,434
    Likes Received:
    3,589
    Trophy Points:
    373
    Location:
    USA
    Printer Model:
    Canon MP830, Pencil
    Thank you for he improved images.

    Single use or refilled?

    I tend to recommend a new OEM Canon cartridge for diagnosing. Others say a new aftermarket cartridge from a known good supplier is sufficient.

    One thought: is there anything blocking the air vent on the outside of the cartridge? Also, is here any fluid blocking/filling the internal air channels inside the cartridge?

    How long was it between the time the printer functioned appropriately and then did not? Was the change sudden or worsen over time?
     
    PeterBJ and The Hat like this.
  7. Sep 28, 2018
    Jedzi

    Jedzi Newbie to Printing

    Joined:
    Sep 27, 2018
    Messages:
    4
    Likes Received:
    3
    Trophy Points:
    4
    Printer Model:
    Canon Pixma MP640
    OK, here's where I feel red faced. I opened up the printer to check the cartridge and noticed that the pull-off tab on the back / top of the cartridge was still partially left on, which was odd. When I took the cartridge out, in fact it hadn't been pulled off at all. I checked the other cartridge that my son had put in to see if that was the problem ... and it was exactly the same.

    I've just spoken to him and he had forgotten that you have to pull it off. However, I really don't understand how I'd missed it.

    This doesn't quite explain how some of the nozzle checks had shown no blue and some had shown some blue.

    However I've just done a nozzle check and it was absolutely fine. I then re-printed the rainbow picture I posted above and it has a lovely blue background, so the problem seems to be solved.

    Many thanks for your help. I wouldn't have found it unless you'd asked me to go back & check the cartridge.

    Jedzi
     
    stratman, PeterBJ and The Hat like this.
  8. Sep 29, 2018
    PeterBJ

    PeterBJ Printer VIP Platinum Printer Member

    Joined:
    Nov 27, 2010
    Messages:
    3,844
    Likes Received:
    3,087
    Trophy Points:
    303
    Location:
    Copenhagen Denmark
    Printer Model:
    Canon iP4300 + Epson scanner
    Thank you for the feed-back.
     
    stratman and The Hat like this.
  9. Sep 29, 2018
    stratman

    stratman Printer VIP Platinum Printer Member

    Joined:
    Apr 19, 2007
    Messages:
    5,434
    Likes Received:
    3,589
    Trophy Points:
    373
    Location:
    USA
    Printer Model:
    Canon MP830, Pencil
    Congratulations on resolving the problem. :clap Thanks for the feedback.

    It's physics in action. It is the result of dynamics of ink moving through the sponge under the negative pressure generated by the print head to suck the ink out of the cartridge. Ink flow through the sponge apparently is not precisely uniform across the sponge and results in the variable deposition of ink when the air vent is blocked. A sufficient amount of time between printing attempts may allow ink to seep into the ink exit port sponge and once again you have something on the printed page which may be variable in deposition. Under normal conditions any variation in ink flow through the sponge is insignificant.
     

Share This Page