Ink Level Detection In Jet Printers

What is the method of determining the ink level?


Bret Cahill

 

What is the method of determining the ink level?

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?


http://webpages.charter.net/jamie_5"

 

when it stops printing?

http://webpages.charter.net/jamie_5"

 

one way is droplet counting, often done by the printer driver.

 

What is the method of determining the ink level?

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

 

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

 

Reminds me. I must clean the print head. Yes, they're not combined ! The
cartridges are fine but the colours won't print. I obviously don't print
enought porn. ;~)

Graham

 

On Wed, 31 Dec 2008 07:43:24 -0800 (PST), Bret Cahill

=>What is the method of determining the ink level?
=>
=>
=>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.