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Canon BCI-24 cartridges - ink detection

How do Canon inkjet printers determine the ink level in cartridges such as the BCI-24C and BCI-24BK? These are merely plastic, foam filled ink tanks. When the cover is opened, the printer asks whether a cartridge has been changed, so it appears that the ink levels can be initialised at this time. Does the printer's uP then keep a count of the "squirts" for each colour, or does it somehow sense the inkflow, or absence thereof, through the nozzles? Maybe it senses a rise in the temperature of the printhead? I ask this because I've started refilling my cartidges and don't want to run the risk of running my printhead dry.

- Franc Zabkar

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Franc Zabkar
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Dunno about the 24's but our i865 uses similar tanks which I have changed to generic ones that can be refilled in position, the detection still works the same so I guess it must be something along the lines you mention. There certainly doesnt seem to be anything that shows on the tanks.

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Regards ......... Rheilly Phoull
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Rheilly Phoull

The drivers for the printer track the number of droplets of ink and do a count down from the known capacity of the tank. Regards Lee

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Lee

Lee wrote in news:4480e3a2 snipped-for-privacy@x-privat.org:

I remember reading somewhere that some drivers simply "guess" at how much ink should be used and use that guesstimate to tell you when to replace the ink cartridges. Perhaps what you described is the same thing interpreted differently.

I kinda miss the old days of bubble jets where they simply ran out of ink. No more text on the page, the ink's done. My HP gives me an "unknown error" that I've since figured out to mean "I think I'm out of ink."

Puckdropper

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Puckdropper

On 3 Jun 2006 03:19:30 +0200, Lee put finger to keyboard and composed:

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If you mean software drivers, then I don't think so. I have a multifunction printer/scanner/copier which can copy in standalone mode.

- Franc Zabkar

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Franc Zabkar

No, no mis-interpretation! I used to be a Canon dealer. Regards Lee in Toronto

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Lee

Franc..... the droplet count is stored on an eprom in the printer and the drivers, when connected, read this information. This information count can be reset by holding down two buttons on the panel, powering on with the cord. Regards Lee in Toronto

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Lee

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