What is the method of determining the ink level?
Bret Cahill
Ink Level Detection In Jet Printers
Dec 31, 2008
12 Replies
Sadly, the preferred method seems to be to "measure" the usage and then arbitrarily determine that it's empty. Oops, it's still half full...... too bad.
l...... too
There are dozens of patents where inductance or capacitance measures the level.
Bret Cahill
I usually replace the cartridge when it quits printing.
Cheers! Rich
Then why did you ask in the first place?
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when it stops printing?
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one way is droplet counting, often done by the printer driver.
too
Because there are dozens of patents based on inductance, capacitance, resistance, ultra sound and other effects.
Generally one technology will prevail.
Which one is it?
Bret Cahill
too
Some are optical.
Cheers
The cheapest one that the makers of the printer have access to the patent on, and works well enough to satisfy their legal obligations.
Generally, the one that people are willing to pay for.
Hope This Helps! Rich
=>What is the method of determining the ink level? =>
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=>Bret Cahill =>
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Oh, dear...What was the question? Terry--WB4FXD Edenton, NC
None. Nada, Zip, Zilch. Level is not determined or detected.
The worst ones count pages, and assume ink was squirted on the pages, and stop printing after 200 pages, or whatever number.
The slightly less bad ones count how many droplets they think they have squirted out, and call themselves empty when there's about 25% left based upon the theoretical size of a drop and the fill amount.
Cats, coffee, chocolate...vices to live by
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