[QUOTE=jon;244]I think that if you flush it one more time in one of two ways - you will be good. I would not print through it anymore at this point. And it is important to get flush into the heads as well now. I hope your flush fluid is non-damaging as well as effective. Please do not use any ammonia for what I am going to suggest. I think that you are comfortable enough working on the printer to remove the print head and using a silicone tubing between the syringe and ink stem, easily push some flush into each head so that it comes streaming out all of the tiny jet orifices. Don’t let the silicone inflate. Then set the aside to “soak” - but not on an absorbant cloth. Keep it moist but and on a non-absorbant surface. If you have doubts whether your flush is safe for a long soak, use some distilled. Water is a great solvent.
You need to get the old ink out the ink lines but not through the print heads and dampers. Probably a lot of really old pigment that was lining the ink lines had partly dissolved and was drivin into the dampers. That is what I hope is happening now because it is the easiest to remedy.
So either use a syring to draw flush through the lines including some back flushing - which the cart should accomodate easy enough. Depends on your cart if it allows fluid pressure back into it. The valve probably remains open both ways. If not you will see the mess and you can rig up something to the cart stem, just don’t bend it. The tubing may stay “color stained” but they should still clean up to be “transluscent”. You will see if there are deposits in clumps or larger areas or as a fine sort of intermittent covering. If they are not transluscent they are not cleared. Use a flashlight as a backlight if you need to. There is a chance that the pigment is still fully in the ink lines and only a narrow channel has been cleared through it.
You can then let everything soak - hit one more time the next day - with fresh flush fluid. Don’t reuse. Finally, reattach the head and charge ink into it with an INIT FILL. I would strongly recommend you change out the dampers the after the INIT FILL as I think it may dislodge anything else lining the tubing. Might as well start with fresh dampers. See if it prints. If you want to chance and see if the dampers are still usable, it only means removing them again to replace. But, if you have clogged nozzles don’t fight them at that point - probably the dampers. If not, then a new head may be needed. Probably still worth it. The 9600/7600 last for ever. Yours may have an original print head in it. Do you know? They are the least expensive of the available print heads. You already have a new capping station you said. So you are near rebuilt as it is.
Keep trying and let me know how it works out. If you do something that you think will benefit others - please reply back with it. Others will benefit from your experience.
I have two questions;
First - you metioned replacing the head. Do you know where to get one?
Second - is it possible to send fluid back throught he print head by suction on the damper nozzles, instead of gently forcing fluid through the damper nozzles into the head and possibly de-laminating it?
My reasoning is as follows: I have taken apart an old print head and I see that the dampers feed into large tubes in the head and then separate into the tiny print nozzles. If there is any ink clogged before the tiny channels it will never feed through to exit into the capping station. Some of the clogs in the old dampers never did dissolve even with very strong fluids like simple green or windex and frequent flushing (just as an experiment). Am I mistaken?
I have the head off now and sitting in a VERY shallow dish of distilled H2O. Even though I had run many “initial fills” there is colored ink in the water from the head!
Again, thank you so much for your time!