what does it mean 5% coverage in toner drums?

[Insider]

Hello, I just bought new samsung 1440 laser printer and I wonder what does
5% coverage means when talking about toner drums lifecycle.

 

[jbuch]

Hello, I just bought new samsung 1440 laser printer and I wonder what does
5% coverage means when talking about toner drums lifecycle.

The typical business letter is said to have mostly white surface and
only about 5% of the white paper is covered by the black "ink" of the
alphabetical characters that form the words that form the letter.

So..... 5% Black = a typical letter or about a typical page of text....

This is a rough indication of the toner that gets laid down onto the page.

The toner drum transfers this toner.

What this has to do with toner drum life is, however, unclear.

Actually, toner drum life could be determined by how many charge and
discharge cycles it sees. There is one charge and discharge cycle per
page printed.

Or, toner drum life could be determined by how many rotations there are
of the drum as it rubs against the cleaning wiper inside the cartridge.
There are several rotations of the toner drum per page printed.

Or, toner drum life could be determined by how many paper clips or how
much sand and dirt and dust your kid slips inside the printer while you
aren't looking. The rubbing of these objects onto the toner drum will
cut down the life of the toner drum.

Jim

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[New Startup]

You have stumbled on the greatest "perceived" concept........!!!!

Divide you letter size paper into 20 equal pieces.........you will get an
area approximately 2 1/2 by 2 inches...

If you covered this area with TOTAL black from your toner on a blank piece
of paper this would be approximately 5%....I have no idea how many letters &
numbers at whatever font size would be equivalent to that....I'll guess a
normal business letter (not too long, not too short, with a
letterhead..LOL).

If your manufacture states you get 5% on 5000 pages, you might only get 600
pages with all photographs on the pages.....

It's just a guesstimate to help you have more toners on hand when you need
them...and to try and sell their lasers if the figures are high, THEN we
have to worry ...how black is the coverage????? (I've seen printers print
SOLID BEAUTIFUL BLACK....and others a sad 70 or less % black (grey)......

I'm sure the experts (laser repair guys & gals) will help comment!


Joe

Don't most manufacturers claim 5% coverage on a continous print run, in
ideal conditions (tempreture/humidity etc).

If you print 1 page doesn't the drum rotate to print the page and also
before and after the page, whereas if you are printing 10 pages at once the
drum rotates for each page and then rotates before and after the 10 pages
have been printed, making it last longer if you print big print jobs.

So for a 10 page document the drum rotates 12 times but if you print 10
single pages the drum must rotate 30 times.

Peter

 

[jbuch]

Don't most manufacturers claim 5% coverage on a continous print run, in
ideal conditions (tempreture/humidity etc).

If you print 1 page doesn't the drum rotate to print the page and also
before and after the page, whereas if you are printing 10 pages at once the
drum rotates for each page and then rotates before and after the 10 pages
have been printed, making it last longer if you print big print jobs.

So for a 10 page document the drum rotates 12 times but if you print 10
single pages the drum must rotate 30 times.

Peter

By simple geometry, the drum is so small in diameter that it rotates
typically 3 or more times to print an 11" long piece of paper. The
repeat distance for drum defects is typically near 3 inches, maybe 4 inches.


I think the asker asked the question meaning to ask about toner life,
and somehow got the drum thing wrapped up into the discussion.

Jim

--
................................


Keepsake gift for young girls.
Unique and personal one-of-a-kind.
Builds strong minds 12 ways.
Guaranteed satisfaction
- courteous money back
- keep bonus gifts

http://www.alicebook.com

 

[Marek Williams]

Thanks , if I understand correctly it implies that it will reach estimated
number of pages if the ink covers 5% of the page. That makes sense even
though it has me worried that the toner will dry on me soon.

Toner cannot "dry" because it is always dry. It is made of itty bitty
pieces of plastic that are fused onto the page under the heat of the
fuser drum. The shelf life of a toner cartridge is usually measured in
years. HP, for example, warrants their cartridges without regard to
how old it is. Other manufacturers are not so generous, but rest
assured you don't need to worry about the length of time it takes to
use up a toner cartridge.

 

[Quaoar]

The typical business letter is said to have mostly white surface and
only about 5% of the white paper is covered by the black "ink" of the
alphabetical characters that form the words that form the letter.

So..... 5% Black = a typical letter or about a typical page of
text....

This is a rough indication of the toner that gets laid down onto the
page.

The toner drum transfers this toner.

What this has to do with toner drum life is, however, unclear.

Actually, toner drum life could be determined by how many charge and
discharge cycles it sees. There is one charge and discharge cycle per
page printed.

Or, toner drum life could be determined by how many rotations there
are
of the drum as it rubs against the cleaning wiper inside the
cartridge. There are several rotations of the toner drum per page
printed.

Or, toner drum life could be determined by how many paper clips or how
much sand and dirt and dust your kid slips inside the printer while
you aren't looking. The rubbing of these objects onto the toner drum
will
cut down the life of the toner drum.

Jim

You left out the part about the cat warfing a furball on the paper tray.

Q