Digital BW, The Print

The 9600 carts don't have any internal pressure. The 10000 and I believe, the 48/78/9800 do.

Walt

>> Seems like when I get down to the end of a cart on my 9600 I get
>more banding that shows 
>> only in solid black areas. Can low volume of ink in a cart cause
>less pressure in a cart, 
>> causing banding?
>> 
>> Mark
>> 9600 Selenium/Carbon sepia ink setups
>> StudioPrint RIP
>>
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I've found that the main problem contributing to micro-lines is that  
the ink lines actually get compressed at the ink-cart stations and at  
the print head. There is a rubber O-ring and a threaded nob that fits  
over that ring. The ring compresses the plastic and the plastic just  
won't let enough ink through. I've found that taking out the ink line  
from the print head and clipping the end of it with scissors and then  
putting the ink line back in, solves this problem. It takes about 20  
mins and probably voids all sorts of warranties. But hey, it works  
for me. I replace the O-ring as well. I have a very nice Epson tech  
who sells me parts but I'm sure you could find these at an Autoparts  
or some other normal store.
Of the four 9600s I run, I've had to do this with three of them. The  
fourth is newer and I'll probably need to do it next year.

Air bubbles in the line can also contribute to this. If you are  
running K7 ink, I would suggest running 5 KK2 cleanings right after  
installing 7 new fresh carts just to run all the air bubbles out of  
your lines. I know it sucks, but there's been plenty of wind in those  
bags in the past. It's a good thing to do anyway just so you know you  
have all your inks running with ONE batch of ink. I would suggest  
getting refillable 9600 carts and buying bottles. This helps w/ air- 
bubbles. Here I am saying it and not doing it, but, well . . . maybe  
I like to suffer.

take care,
Walker Blackwell

You got that right Walker.  I have a 9800 (supposedly pressurized) that 
had all sorts of problems with inkflow.
Finally Epson clued in and the tech went through the process you 
describe, seems to have fixed the problem.
He had to drain the ink from the lines though, do you have to do that?

Ken

Walker Blackwell wrote:

>
> I've found that the main problem contributing to micro-lines is that
> the ink lines actually get compressed at the ink-cart stations and at
> the print head. There is a rubber O-ring and a threaded nob that fits
> over that ring. The ring compresses the plastic and the plastic just
> won't let enough ink through. I've found that taking out the ink line
> from the print head and clipping the end of it with scissors and then
> putting the ink line back in, solves this problem. It takes about 20
> mins and probably voids all sorts of warranties. But hey, it works
> for me. I replace the O-ring as well. I have a very nice Epson tech
> who sells me parts but I'm sure you could find these at an Autoparts
> or some other normal store.
> Of the four 9600s I run, I've had to do this with three of them. The
> fourth is newer and I'll probably need to do it next year.
>
> Air bubbles in the line can also contribute to this. If you are
> running K7 ink, I would suggest running 5 KK2 cleanings right after
> installing 7 new fresh carts just to run all the air bubbles out of
> your lines. I know it sucks, but there's been plenty of wind in those
> bags in the past. It's a good thing to do anyway just so you know you
> have all your inks running with ONE batch of ink. I would suggest
> getting refillable 9600 carts and buying bottles. This helps w/ air-
> bubbles. Here I am saying it and not doing it, but, well . . . maybe
> I like to suffer.
>
> take care,
> Walker Blackwell
>

Yes. I have to drain the inks from the lines. It drains more than the  
lines too. Namely, the green, inky, silky stuff in my wallet.

Walker,
Do you think this will only happen when a cart is "almost" empty?  
That is only when it happens, I put in a new cart(s) and it goes away.
Mark

On Aug 15, 2007, at 9:02 PM, Walker Blackwell wrote:

> I've found that the main problem contributing to micro-lines is that
> the ink lines actually get compressed at the ink-cart stations and at
> the print head. There is a rubber O-ring and a threaded nob that fits
> over that ring. The ring compresses the plastic and the plastic just
> won't let enough ink through. I've found that taking out the ink line
> from the print head and clipping the end of it with scissors and then
> putting the ink line back in, solves this problem. It takes about 20
> mins and probably voids all sorts of warranties. But hey, it works
> for me. I replace the O-ring as well. I have a very nice Epson tech
> who sells me parts but I'm sure you could find these at an Autoparts
> or some other normal store.
> Of the four 9600s I run, I've had to do this with three of them. The
> fourth is newer and I'll probably need to do it next year.
>
> Air bubbles in the line can also contribute to this. If you are
> running K7 ink, I would suggest running 5 KK2 cleanings right after
> installing 7 new fresh carts just to run all the air bubbles out of
> your lines. I know it sucks, but there's been plenty of wind in those
> bags in the past. It's a good thing to do anyway just so you know you
> have all your inks running with ONE batch of ink. I would suggest
> getting refillable 9600 carts and buying bottles. This helps w/ air-
> bubbles. Here I am saying it and not doing it, but, well . . . maybe
> I like to suffer.
>
> take care,
> Walker Blackwell
>
> .
>
> 



[Non-text portions of this message have been removed]

Mark Savoia wrote:
> Walker,
> Do you think this will only happen when a cart is "almost" empty?  
> That is only when it happens, I put in a new cart(s) and it goes away.
> Mark

The O ring issue is an old one and could happen on 9000's 
too when dampers were replaced too often and the nut on the 
connection turned too tight. We solved it the same way. 
Normally it shouldn't be too tight for the inkflow.

But on the pressure getting lower at the end of a cart's 
life is more likely the result of the ink bag in the cart 
folding up not as nice as the Epson engineers hoped for and 
by that the ink level dropping more versus the head height 
than with a fresh ink cart. The ink bag stands vertical on 
the long side in the cart and the ink seal that connects to 
the printer ink line is exactly in the center of the short 
side of the bag. The ink level should stay the same as the 
bag flattens horizontally and all the ink still occupies the 
vertical shape of the bag and by that ink pressure is kept 
consistent. But as written at the last mls it will no longer 
work as nice as expected and the bag flattens totally at the 
top while the rest of the ink is more at the bottom. Could 
be that Epson solved that problem at the 9600 introduction 
by letting more ink in the carts than the customers liked. 
The last got their firmware upgrade to solve that kind of 
ink waste but possibly another issue in return.

My 9000 CIS system had ink bottles on springs to keep the 
ink level equal.

With the pressurised carts it will be less of a problem 
although there is still an ink bag inside and on the 9800 
the bag is a bit more complicated so they could make the 
cart smaller. It is nicer to have a real ink pump in every 
cart like the HP Z3100 (and more HP models) has or the 
continuously pumped ink loop of the Canon iPF models that 
keep both carts and ink lines fresh.

-- 
Met vriendelijke groeten,  Ernst


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