7890 clogged nozzles


#1

Attempting to put my 7890 printer in storage for a while, I used the old style bag type of carts to fill with
piezoflush. Having never used this type of cart before, I was unsure about the filling process, and now think that perhaps I may have overfilled the carts- not sure as there were no specific instructions with the carts or on the IJM site. I filled and primed them. I believe my first mistake was not doing an INIT FILL, but instead doing a series of power cleans. With my 9880 printer, it has taken only two power cleans to run piezoflush into the ink lines for safe storage, (which I’ve been doing for years) so I thought the 7890 would be similar. However, with the 7890, I could not get a pink nozzle check in the C or LC although there were no missing gaps in any channels. I persisted in doing more power cleans…, probably a mistake, and then suddenly the C and LC channels went completely blank. I should add that during the beginning of the power clean cycle I could hear a strange whistling sound, which I thought might be a bag-style cart problem. I removed the C and LC carts, refilled, primed, and reinserted. The C and LC carts seemed to have used the same amount of piezoflush as the other carts, so I thought that the lines were filling ok. I tried a number of piezo flush cleanings of the print head with paper towel, following the video instructions, cleaning the capping station, wiper assembly, etc. But I could not get the C or LC channels to print out at all. Then I left for a two week vacation, having run out of time, hoping that upon my return any problem I might have caused with air in the lines would be corrected. But upon my return, still no C or LC printing in the nozzle checks, though all other channels are perfect. My fear is that I have damaged the print head with too many power cleans.
I am considering the following:
• replace the C and LC carts with new ones, filled with piezoflush, and do an INIT FILL to see if this will fix a potential air-in-the-lines issue caused by defective carts or something I did wrong in the filling. I’ve read through related posts on this, but am perplexed as to what to do at this point. I don’t know if more damage will be caused by letting the printer sit for longer without fixing whatever the problem may be. I am doing more traveling over the next two months, and was planning on just leaving the printer with piezoflush in it for storage. Should I relent and take it for servicing? Any advice would be greatly appreciated! Thank you!


#2

Ok. So are the “bag style” x890x900 carts from us? We have not sold these is years and years I think if at all.

But in general, yeah, you need new cartridge(s). I’m also worried that you head is damaged though because if it’s able to suck PiezoFlush through it should also be able to print it. That said, if there is a back pressure from the cartridge this will cause a problem where it can still suck the PF during cleaning but right afterwards the PF withdraws from the head and back into the inkline/dampers.

First, try new cartridges. Second, service.

-Walker


#3

Walker- will order carts tomorrow and see how it goes. Will it cause more damage to let it sit for a while till I am back at the studio? Thanks for your advice!


#4

And yes, these were carts I bought from IJM quite a few years ago and had never used.


#5

Probably not any more damage.