Intermittant Canon Head Problems?

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overload

I'm running a Canon i9100 with a Camel CRS system.

The problem I'm describing for black is different from the behavior of
each other color at this time. The black used to be able to do this
too. I don't know what the problem is.

When the print head is cleaned (regular cleaning), the black (K) ink
will print a perfect nozzle check. It will print five or six pages
with 30% coverage. What it won't do is 100% coverage for a purge page
or even 10 pages with 50% coverage. All of the other colors will.

* It appears that the black ink is starving, with enough reaching
the head after a cleaning, but with insufficient flow to keep up with
ink used. Black output first becomes streaky, then peters out
altogether. Other colors are not affected.

* I have replaced the black cartridge and checked the plumbing all
the way back to the feed bottles. Since I did a vacuum fill of the new
cartridge, I know all the plumbing from the cartridge to the reservoir
is all working okay. The tubing can deliver enough ink to stream
across the cartridge tank -- far faster than the print head can use
it.

* The problem appears to be some sort of flow restriction inside the
head -- that doesn't cause permanent clogs, but does cause temporary
clogs during heavy usage -- only for black.

Is anybody familiar with this problem? Does anybody have a solution?

More info: Using Weink RC52 inks for two or three years and have
recently cleaned the "waste ink tank" for the first time. I use this
thing as a small color printing press for 8.5 X 11 booklets. I also
had to replace the USB cable this month as it was causing intermittent
loss of printer.

Please reply to this newsgroup.

Thanks.

Jim
 
I'm running a Canon i9100 with a Camel CRS system.

The problem I'm describing for black is different from the behavior of
each other color at this time. The black used to be able to do this
too. I don't know what the problem is.

When the print head is cleaned (regular cleaning), the black (K) ink
will print a perfect nozzle check. It will print five or six pages
with 30% coverage. What it won't do is 100% coverage for a purge page
or even 10 pages with 50% coverage. All of the other colors will.
Click to expand...
YOU ARE NOT USING APPROPRIATE RECOMMENDED INK FOR YOUR PRINTER SO YOU
SHOULD NOT REALLY HAVE A BEEF AND SHOULD EXPECT THESE KINDS OF PROBLEMS.
* It appears that the black ink is starving, with enough reaching
the head after a cleaning, but with insufficient flow to keep up with
ink used. Black output first becomes streaky, then peters out
altogether. Other colors are not affected.
Click to expand...
AND OF COURSE YOU DO NOT KNOW THE BRAND OF INK YOU ARE USING.
* I have replaced the black cartridge and checked the plumbing all
the way back to the feed bottles. Since I did a vacuum fill of the new
cartridge, I know all the plumbing from the cartridge to the reservoir
is all working okay. The tubing can deliver enough ink to stream
across the cartridge tank -- far faster than the print head can use
it.

* The problem appears to be some sort of flow restriction inside the
head -- that doesn't cause permanent clogs, but does cause temporary
clogs during heavy usage -- only for black.

Is anybody familiar with this problem? Does anybody have a solution?

More info: Using Weink
Click to expand...
NOW I UNDERSTAND
 
The problem appears to be some sort of flow restriction inside the
head -- that doesn't cause permanent clogs, but does cause temporary
clogs during heavy usage -- only for black.
Click to expand...

May be a viscosity problem. Too thick to flow fast enough.
 
May be a viscosity problem. Too thick to flow fast enough.
Click to expand...

Possibly due to evaporation in the supply bottles, but I have refilled
when I changed the cartridge so the ink is fresh out of the supply
bottle. The supply bottle is recent, so not likely to be aged in the
bottle.

Seems more likely to be a problem with the head.

Thanks.

Jim
 
Possibly due to evaporation in the supply bottles, but I have refilled
when I changed the cartridge so the ink is fresh out of the supply
bottle. The supply bottle is recent, so not likely to be aged in the
bottle.
Click to expand...

This sounds like a problem with air in the printhead. There generally
is a slight vacuum between the nozzles and the foam system which
provides the proper back pressure to keep the ink from leaking out of
the printhead. If there are air bubbles in this area you would get the
results you are seeing. During periods of heavy printing there is a
stronger vacuum, which causes the air bubble to grow in size. At some
point the air bubble is large enough to prevent ink flowing and you get
the result you see.

Priming the air out of the printhead should cure your problem.

Regards,
Bob Headrick, MS MVP Printing/Imaging
 
This sounds like a problem with air in the printhead. There generally
is a slight vacuum between the nozzles and the foam system which
provides the proper back pressure to keep the ink from leaking out of
the printhead. If there are air bubbles in this area you would get the
results you are seeing. During periods of heavy printing there is a
stronger vacuum, which causes the air bubble to grow in size. At some
point the air bubble is large enough to prevent ink flowing and you get
the result you see.

Priming the air out of the printhead should cure your problem.

Regards,
Bob Headrick, MS MVP Printing/Imaging
Click to expand...

Yes, Bob, Thank you.

But how do I do that?

I can run 20% patterns for hours without fixing the problem. I can do
several deep cleanings without fixing the problem. Is it possible
there is an air leak between the cart and the head?

Any suggestions welcome.

Thanks.

Jim
 
Is it possible
there is an air leak between the cart and the head?
Click to expand...

From experience I have found that the seal between
cartridge can give problems, occasionally with new OEM,
often with removed and replaced or non-OEM.
 
From experience I have found that the seal between
cartridge can give problems, occasionally with new OEM,
often with removed and replaced or non-OEM.
Click to expand...

Thanks ato_zee. I will pull the head and inspect the seal area over
the weekend. I can't tell anything using a flashlight on the black
head port.

Thanks.

Jim
 
From experience I have found that the seal between
cartridge can give problems, occasionally with new OEM,
often with removed and replaced or non-OEM.
Click to expand...
NEVER HAD A PROBLEM WITH OEM
 
SOLVED!

I removed the head and cleared it with running water, then soaked it
in Windex with ammonia.

After it seemed clean, I squirted canned air into the print nozzles
until color showed up in the inside of the head sponges.

Cleaned again, and repeated until the in-head sponge thingies stayed
clear.

Re-installed head and CRS. Ran deep clean to re-prime head. Works fine
now.

Must have cleaned out whatever the problem was, or cleaned the cart
seals enough to eliminate the air-block problem.

Thanks to all who responded.

Jim
 
This is a friction problem of ink. You have to change a quality of
black ink. From pigment to dye quality. You will loose somthing in
quality but there is never something for nothing . So it is up on to
you to decide.

Pozdrav

adriatic
http://adriatix.hr/Blog/Index.htm
 
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