Clogged Light Black Ink on Epson 7900 (same line on each nozzle check pattern)

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Garnick:
Quote from: Mark D Segal on April 23, 2011, 04:54:31 PM

Turning back to the main topic of this thread - the 7900 - and Gary's experience with his 9900 - I have colleagues here in Toronto using both of these printers extensively and they sing the praises of them. This means they are capable of first-rate performance. Needless to say, any piece of complex machinery can have issues, and one hopes the manufacturer retains an interest in going the extra mile to keep their reputation intact. This is a very competitive market segment.


I agree with your colleagues Mark, these printers are very capable of the first-rate performance of which you speak.  When they are performing up to their potential they are a joy to work with. However, after reading posts on this forum concerning possible issues with these machines I began a log the first day I started printing with the 9900. That list of issues, mostly repeatable issues, has grown to more than 60 entries and has served me well when talking to the folks at Epson and the onsite service techs as well. I too keep a collection of nozzle checks, dated and timed to coincide with my log entries. With these I can show the techs exactly what is happening and they can then diagnose the situation with a higher degree of accuracy. All of this to say that I will continue to be in touch with Epson as often as I deem necessary to keep the printer doing the job it was meant to do.

I believe you also mentioned that these X900 series printers should not have the nozzle dropouts and other issues you are experiencing. And again I agree, they shouldn't. But keep this in mind Mark. The last tech I talked with at Epson about two weeks ago was a fellow who, in my opinion, was one of the most straight shooting techs I had experienced. I again explained my situation and of course he had my file of past calls to read as well. One of the first things he said was this, " I assume you are aware that nozzle droputs not unusual on these machines". He's the first person at Epson who has actually uttered these words to me. I agreed of course, but I also told him that I had been using two 7600 printers for many years without the frequency of problems I had been experiencing with the 9900. He had no answer to that statement, except to arrange another service call. I'm hoping that will happen very soon, but I guess the local service techs are still waiting for parts. Rather suspect I think. I will place another call to Epson on Monday to have them track the situation, again.

You're quite correct, this has been a very interesting thread. Some helpful information and perhaps some not so helpful, but interesting all the while. And just so you know Mark, I'm not far from The Big Smoke myself. Perhaps we shall meet sometime. I will continue to follow your posts regardless. And I will continue to keep you posted on my progress with the mighty 9900.

Gary

artbot:
well if it's not so good on start up but fine as the printer starts "warming" up after printing and such.  there is a term "vapor lock" meaning the print head simply is resisting the positive pressure of the ink in the tiny lines and needs a little encouragement.   then all is well.  i developed a white ink that i printed from an old encad 505 more than 10 years ago.  using the ink always required a bit of manual cleaning and raising that that cart' a little to get the ink going which i knew was a slightly higher viscosity than the other colors.  this is why damper swapping can be of good use.  the ability to see if you can move the issue to another channel is essential to diagnosing if the issue is on the supply or vacuum side.  there was a guy that did glass printing with a custom ink from dupont that pulled his hair out with issues before we discovered by thorough diagnosis that he received a batch of ink that the viscosity was off.  

as for further contributing to this thread, i'm out.  i not really digging the mood here.  i know so much about making printers work, it will boggle the mind and i'm not really enjoying being "patted on the head", so to speak.

Farmer:
Perhaps if you were a little more humble and realised that there are people here with decades of experience or industry involvement instead of assuming that we all know nothing, you might be better received.

Mark D Segal:
Quote from: Garnick on April 23, 2011, 11:45:25 PM

I agree with your colleagues Mark, these printers are very capable of the first-rate performance of which you speak.  When they are performing up to their potential they are a joy to work with. However, after reading posts on this forum concerning possible issues with these machines I began a log the first day I started printing with the 9900. That list of issues, mostly repeatable issues, has grown to more than 60 entries and has served me well when talking to the folks at Epson and the onsite service techs as well. I too keep a collection of nozzle checks, dated and timed to coincide with my log entries. With these I can show the techs exactly what is happening and they can then diagnose the situation with a higher degree of accuracy. All of this to say that I will continue to be in touch with Epson as often as I deem necessary to keep the printer doing the job it was meant to do.

I believe you also mentioned that these X900 series printers should not have the nozzle dropouts and other issues you are experiencing. And again I agree, they shouldn't. But keep this in mind Mark. The last tech I talked with at Epson about two weeks ago was a fellow who, in my opinion, was one of the most straight shooting techs I had experienced. I again explained my situation and of course he had my file of past calls to read as well. One of the first things he said was this, " I assume you are aware that nozzle droputs not unusual on these machines". He's the first person at Epson who has actually uttered these words to me. I agreed of course, but I also told him that I had been using two 7600 printers for many years without the frequency of problems I had been experiencing with the 9900. He had no answer to that statement, except to arrange another service call. I'm hoping that will happen very soon, but I guess the local service techs are still waiting for parts. Rather suspect I think. I will place another call to Epson on Monday to have them track the situation, again.

You're quite correct, this has been a very interesting thread. Some helpful information and perhaps some not so helpful, but interesting all the while. And just so you know Mark, I'm not far from The Big Smoke myself. Perhaps we shall meet sometime. I will continue to follow your posts regardless. And I will continue to keep you posted on my progress with the mighty 9900.

Gary


Thanks Gary - would be a pleasure to meet sometime. I hope when they're able Epson does the needful so you can get to the bottom of your issues with the 9900. It's not good to invest so much in these machines and then suffer the aggravation and productivity loss. I also think if that tech were correct in his assessment of the drop-out situation, Epson would get a lot more mileage from its customers by acknowledging it, developing workarounds, and publishing material on "best-practices" for handling it. In such a situation they would earn respect.

Shane Webster:
Quote

because I'm seeing rather unique Cyan nozzle check gaps on my 4900 if not used for more than a couple of days.

Mark-- I've constantly had clogs with my 4900's Cyan printhead and now have a nozzle that will not unclog (I've performed about 10 cleanings, including 4 or 5 power cleanings).  I've called Epson to report the problem and they're exchanging my printer.

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