DESIGNJET 3500 PRINTHEAD FAILURES (24 Views)
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Super Advisor
Posts: 321
Registered: ‎11-05-2002
Message 1 of 4 (24 Views)

DESIGNJET 3500 PRINTHEAD FAILURES

This 3500 was recently set up with 4 new ink systems...all components were replaced. The plotter gets very light use..about 4 A0 size plots a day.After around a week the magenta stopped printing all together..I carefully cleaned the printhead and after a few printhead checks and a bit of priming it came good again...Now about 10 days later the same thing has happened, but this time when the plotter does it`s printhead checks (all four colours are a bit dodgy) followed by a prime, the printhead test printout gets worse instead of better??? The cleaners are all new and clean. I can`t understand how after a prime the printhead test can be worse than before...but it is. Could it be that the printheads aren`t being capped properly?Any ideas more than welcome!
Honored Contributor
Posts: 2,342
Registered: ‎12-04-2003
Message 2 of 4 (24 Views)

Re: DESIGNJET 3500 PRINTHEAD FAILURES


Steve,

Why don't you take off the four prinheads and check if there is any dirt or ink around the contacts of the slots in the Carriage Assy.?? If true, clean them with a dapmened lint-free cloth until you see them clean. The printhead contacts are no exception. As a last choice and before replacing any printhead as needful, try cleaning the nozzles of the printhead again.

Try this after a prime and let us know.

Regards,

Sa'ad
If there is a will, there is a way.
Honored Contributor
Posts: 2,342
Registered: ‎12-04-2003
Message 3 of 4 (24 Views)

Re: DESIGNJET 3500 PRINTHEAD FAILURES


I'm sure you're going to turn the plotter off before starting the cleaning process.

Sa'ad
If there is a will, there is a way.
Esteemed Contributor
Posts: 360
Registered: ‎03-31-2004
Message 4 of 4 (24 Views)

Re: DESIGNJET 3500 PRINTHEAD FAILURES

Here are a couple other points to consider;

#1. To answer your question - YES. It is very possible the pens are not capping properly, but cleaning the contacts like Sa'ad said would be the first thing to try ( and the most likely cause of the issue )

#2. When you go to clean the nozzle plates again ( if needed ) make sure you dont wipe across the bottom. Just take a wet lint free cloth - coffee filters work very well for this - and just set the nozzle plate on it for a couple seconds. Check to see if ink is flowing and if not do it several times until it does. This is called wicking - the dried inkwill be disolved and the fresh ink gets drawn out - like a wick. Then you can wipe around the outside edge of the nozzle plate to remove any build-up remaining.
HHHhhmmm ..... OK
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