Digital BW, The Print

Paul Roark wrote:
> Does puncturing the backflow valve affect performance?  
> 
>  
> 
> My general impression was that the pressurized carts were an improvement in
> some way over the others.  So, if we could keep all the advantages of the
> carts and simply refill them, that might be better than these funnel fill
> carts.
> 
>  
> 
> I'm assuming MIS must have some 3800 chips if they are looking for beta
> testers.  They may be like the 260 chips - auto reset.  There are worse
> things.  I just re-fill when they reset.
> 
>  
> 
> Paul

The 10000 and 9800 have been used with the modified carts 
and showed no abnormal behavior.

On the 10000 there's a secondary electric valve on every 
inkline just after the the cart slots. It is opened when a 
sensor signal from the head buffer says that there isn't 
enough ink in the buffer, closed again when another sensor 
says there's enough in the buffer. When the printer is idle 
or off the valves are closed. So no ink can run from the 
inklines back into the carts. The air pressure on the carts 
isn't translated to more pressure on the inklines c.g heads 
c.q. droplet creation but is only used to fill the head 
buffers. As this machine runs fast and can create ink demand 
fast it needs a forced ink supply. I have no 9800 but a good 
friend has and as far as it goes he thinks that there is the 
same design in that machine. Anyway it runs with refilled 
carts for two years now. The spring valve in the cart closes 
the cart when taken out so nothing changed there too. Could 
be that airline transport with changing air pressure has an 
influence (opinions differ on that transport condition).

The Mediastreet 10000 clone carts are wrong in size and 
built with inferior materials. Most likely the shape has 
been copied directly to the injection mold size without 
counting in shrink for the molded part. The chip orientation 
was 3 mm off on the set I ordered. I have taken off the 
chips and glued them on Epson 10000 carts . I needed some 
extra carts but didn't have the right color empty ones so I 
solved it in my way (cut tabs off to get the coding right). 
Mediastreet wasn't helping on this issue. I'm not aware of 
any other 10000 cart clone.

The transparent carts with the fill opening at the top do 
not equalise the pressure properly over the full > empty 
cart period but if you keep them filled a bit above halfway 
this may not be a problem. The Epson vertical bag method 
keeps the pressure more equal.

There's no pressurised model of that transparent cart as far 
as I know. There would be ways to do it differently but the 
Epson carts are very good in quality and with the changed 
seal/valve construction since the 9600-10000 actually more 
suited for refilling than the old 9000 model was.


-- 
Met vriendelijke groeten, Ernst


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