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
--
Please remove one 'i' from my address when replying by email.

Franc Zabkar wrote:
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

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.

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

Franc Zabkar wrote:
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
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 wrote in :

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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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
--
www.uncreativelabs.net

Old computers are getting to be a lost art. Here at Uncreative Labs, we
still enjoy using the old computers. Sometimes we want to see how far a
particular system can go, other times we use a stock system to remind
ourselves of what we once had.

To email me directly, send a message to puckdropper (at) fastmail.fm

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

Franc Zabkar wrote:
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

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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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
--
Please remove one 'i' from my address when replying by email.

Puckdropper wrote:
Lee wrote in :

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

Inviato da X-Privat.Org - Registrazione gratuita
http://www.x-privat.org/join.php


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.

Puckdropper

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

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Franc Zabkar wrote:

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

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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