Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark" 
<paul.roark@v...> wrote:
>
> My 7500 seems to be spitting ink on the left edge (as I face the 
printer) of
> usually large prints with increasing frequency.  Is there a good 
way to stop
> this?
> 
>  
> 


Are these "large" drops of inks? It might be that you have a 
partially clogged nozzle. As the inks spray a small portion is held 
back and starts to form a drop, when the drop is big enough... SPLAT! 
Can also be caused be hair or paper fibers stuck to the head. A 
thorough cleaning of the nozzle side of the head, and the sides of 
the head might be in order. Replacing the head cleaner (wiper) might 
help too. Are you seeing an increase in the number of clogs? If you 
are seeing an increase, might be time for a new capping station and 
ink pump. Tearing the covers off might be the hardest part of all 
this work. Running cleaning fluid through the lines and heads might 
be a good idea too, do that before tearing the machine apart as it 
will help to prevent the ink inside the heads from drying while you 
are messing around cleaning the other parts.

The other thing that could be causing it (less likely) is the 
pressure in the ink lines. Too much pressure and you start to get 
drops forming on the head. As those drops accumulate more ink from 
the spraying nozzles, the drop gets bigger, until SPLAT! Since you 
refill carts, that is much less likely than goop on the heads.

You do have a service manual for that printer right? Last time I 
checked, the entire maintenance kit (head cleaner, capping station, 
ink pump, waste ink pads, flush box left and right) was only $125