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FLUSHING....WHY?

Discussion in 'Canon InkJet Printers' started by mikling, Aug 9, 2014.

  1. Aug 17, 2014
    The Hat

    The Hat Printer VIP Moderator

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    Ops @stratman did you not remember me mentioning above to wrap the cart in a paper towel before inserting it in the sock, it saves having to use an umbrella indoors.. :confused:
    Why don’t you just switch to the CLI-8’s instead and not use the problematic BCI-6’s :)
     
  2. Aug 17, 2014
    martin0reg

    martin0reg Printer Master

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    You funny people playing with your socks...while I am struggling with a sponge...ggrrrr

    Switching to CLI's would be possible, but "sub-optimal" as the BCI's has one more "nose-pieces" to hold them in the printhead
    http://www.printerknowledge.com/attachments/bci-cli-jpg.1308/
    The holding clip of the big pgk cast is also slightly different.

    Anyway CLI will be my last chance - when I'm tired of flushing empty and stained BCI's without success..
     
  3. Aug 18, 2014
    jtoolman

    jtoolman Printer Master Platinum Printer Member

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    Sorry but... why not just top fill.
    Joe
     
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  4. Aug 18, 2014
    CakeHole

    CakeHole Print Addict

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    Yeah im puzzled now why not just top fill (the hole you make would stop the air pocket/block/whatever it is issue you have) or why not just insert the syringe via your german method with no ink and draw back on it, thus removing any trapped air first.

    Reading again are you sure the needle is long enough to reach the ink chamber, ive never in all my time reading here heard of an issue where you can not get NO INK at all into the ink chamber, that would have to be one serious air pocket or air blockage/problem for all the ink to suddenly flow upwards and straight to the sponge. Even with air issues you should be able to at least 1/4 to 1/2 fill the ink chamber.

    I think the issue may be something else entirely.
     
  5. Aug 18, 2014
    stratman

    stratman Printer VIP Platinum Printer Member

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    No, I did not forget about the paper towel. :\
     
  6. Aug 18, 2014
    PeterBJ

    PeterBJ Printer VIP Platinum Printer Member

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    With the PGI-5/CLI-8 cartridge generation a groove at the bottom of the cartridges was introduced to help establishing an "ink bridge" from the reservoir to the sponge. The top cartridge is a BCI-6 and the bottom cartridge is a CLI-8

    BCI6-CLI8.jpg

    Probably this will cause the sponge to absorb ink more readily when refilling? The CLI-8 cartridges can replace the BCI-6 cartridges, but the PGI-5 cartridge needs a slight modification to replace the BCI-3e cartridge.
    I think this is a good idea. I have read somewhere on the forum that top filling is better for saturating the lower sponge in case of over-dried cartridges. I have done some tests indicating this is true, but more tests are needed to get to a conclusion.

    Inspired by this thread and mikling's videos about dry cartridges, I have also tried what might be called a hybrid Top/Freedom refill method. Instead of doing a traditional Freedom refill, I inserted a needle through the silicone plug replacing the seal ball using a 50 ml Luer-Lock syringe, and did a Freedom refill directly into the reservoir. The cartridge is held in the normal upright position for top filling and both the ink outlet and the vent is sealed. This method quickly drew ink into the sponges, but when the reservoir was filled about half, foam started to form in the reservoir. I then removed the silicone plug and finished the refill as a traditional top fill.

    Maybe the foam in the reservoir was caused by my use of a Luer-Lock syringe and a thin needle? A Luer-Slip syringe fits perfectly into the fill hole, after the removal of the sealing ball. Maybe the use of a Luer-Slip syringe and no needle will form less or no foam?

    I think this hybrid refill method looks promising for refilling over-dried cartridges, but more testing is needed.
     
  7. Aug 18, 2014
    stratman

    stratman Printer VIP Platinum Printer Member

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    There are reports of sponges moistened with water more readily taking up ink than a bone dry sponge. Could slightly hydrating the sponge help?

    Will these sponges not absorb ink over time if the cartridge is left to set?
     
  8. Aug 18, 2014
    CakeHole

    CakeHole Print Addict

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  9. Aug 18, 2014
    martin0reg

    martin0reg Printer Master

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    Thank you all for tips and hints...cakehole is right, it is not an issue of the sponge taking no ink..quite the contrary...
    http://www.printerknowledge.com/threads/flushing-why.9217/page-4#post-73025

    @jtoolman: with top fill I sure would be able to fill the reservoir - but the "bad sponge" will probably behave like mikling explains in his new video, too much ink in the upper sponge while the lower sponge gives no ink (because of blocking voids or what ever)

    @PeterBJ: As I said CLI will be my next step...
    ...and regarding your link
    http://www.printerknowledge.com/thr...purged-and-thouroughly-dried-bci-6-cart.8721/
    ...grandad describes two cases of top fill a flushed and dust dry sponge, the first is exactly ONE of the issuues which happens to me :
    "I have always noted that the first refill on a purged and thoroughly dried cart (> 6 months in my basement) will cause the ink to be immediately wicked into the sponges - all the way to the top..."
    ..but while refilling german in this case you are not able to fill the reservoir because you will press the ink through the upper sponge into the vent...

    I think this all depends on good or bad sponges...lower and upper...flushed with water or with cleaning solution...the lower should be able to suck ink till dripping wet, without any "voids" ...the upper should more or less repel (!) ink and letting air exchange...
    This week I will flush a few more old BCI's to see if this "missbehaving sponges issue" or "blocking air exchange issue" continues
     
  10. Aug 18, 2014
    stratman

    stratman Printer VIP Platinum Printer Member

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    Have you tried a simple forced breath of air through the top vent of these troublesome cartridges? This should force air through the sponges and out the ink exit port, possibly breaking up recalcitrant 'air voids'.
     
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