Digital BW, The Print

Jimbo,

Thanks for the info! My yellow nozzle test is completely blank. Have you
used PiezoFlush and do you think it would do any good? I am not sure if this
is a head clogging or if something else is broken or clogged and no ink is
reaching the head. When I do the paper towel soaking all of the other inks
are drawing onto the towel. One day it was working producing a good check
and the next day it stopped completely. 

Thanks,

Gary Wagner

 

From: DigitalBlackandWhiteThePrint@yahoogroups.com
[mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of mrjimbo2
Sent: Friday, February 07, 2014 9:40 AM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] Epson 4900 not printing VLM or LC / Gary / Arthur

 

  

First to answer your question you can typically see it .. Open the hood and
look. I have a small flash light that I use on some printers where
visibility is difficult.. but it will show up.. A power clean typically will
get them out but you could also pull them out with a syringe but that in my
experience has gotten a bit messy with me at the helm...:-).. 

 

Ok I forgot something very important in my last post.. some how I was
thinking it was the 7900 not the 4900...Ok the 4900 does not have a
pressurized ink system.. (have the 4800 ) Anyway they use an ink reservoir
of sorts .. so repeated efforts at cleaning or nozzle tests can run the
reservoir dry especially if it's starved. So going slow with these guys is
in my experience the way to go.. If you seem to be going backwards then just
stop.. wait several hours and come back.. or the next day.. Also if the
channels that are giving you a hard time are low on ink..(pull the carts and
shake them to make sure your good to go)  put fresh carts in those channels
then after the issue is resolved put the old ones back in to finish them. 

 

Ok, one more thing.. this is for printers that set for some time.. I posted
this once before and freaked everybody out.. or think I did.. The inks can
settle in your lines. So they can get a bit sludgy on the bottom..  When
inks start moving thru the lines again I think it's possible that improperly
mixed inks are moving inside the tubes.. ( No I can't prove this ..it's a
theory) Anyway, I have a printer set up with K6 and if it sits for a while
the images are always screwy.. Soooo I now occasionally tape a battery
powered egg shaped vibrator that is adjustable ( yes it exactly what you
think it is) to the lines and let it run for 5 minutes or so... the
vibrations get to the entire line length and it put all the particles back
in suspension.. To be honest I don't really notice that much difference on
color images but I sure do on B&W .. 

 

jimbo

 

 ----- Original Message ----- 

From: Gary <mailto:gary@...>  

To: DigitalBlackandWhiteThePrint@yahoogroups.com 

Sent: Friday, February 07, 2014 9:43 AM

Subject: RE: [Digital BW] Epson 4900 not printing VLM or LC

 

  

Jimbo,

How can you tell if you have air in the line?

Thanks,

Gary Wagner

From: DigitalBlackandWhiteThePrint@yahoogroups.com
[mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of mrjimbo2
Sent: Friday, February 07, 2014 8:37 AM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] Epson 4900 not printing VLM or LC

  

Arthur,

It winter , really low humidity and it sat for a while.. So a couple of
things you can do / try.. First make sure the two colors that won't show
don't have air in the lines.. 

Next wet the park pad with water.. really wet it .. ( I use an eye dropper
for this) Put the head over it for an hour or so.. Then try a nozzle test to
see if your getting anything if you start seeing a few lines go ahead and do
a regular cleaning cycle.

If that doesn't work , This one you'll want to keep an eye on so you don't
start wicking ink out thru the head.. wet a paper towel with a mix of water
and simple green... fold it in half to double its thickness... get that  in
the rollers manually...make sure it's good and wet even if you have to add
more with an eye dropper.... then  pull the head off park and let it set on
it for several hours.. (no windex or similar as that dries it out).

As far as Epson saying you need a new print head.. well too soon to say that
I think..... you might have a damper issue or simply struggling with air in
the line...

jimbo

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