-
Blue lines in print – mainly when printing grey
Hi all,
Having an issue with print quality where blue banding is appearing in grey prints. The black also seems to have been losing sharpness for a while now with fuzzy slightly undefined edges.
Machine cleaning cycle is set to 12hr intervals and I regularly perform cleans/nozzle washes.Is this the end of the road for this print head? 🙁
Machine is Mimaki CJV30Any help appreciated as I have work to do and will not put out inferior quality prints.
Kind regards,
Jon
Attachments:
-
11 Replies
-
Hi
whats your test print/ nozzle check like looks like you are getting deflection from cyan headKev
-
Thanks Kevin. I’m just doing some more cleaning and will then print a test and see.
What can cause a deflection, simply clogged nozzles? Or can other factors cause it?Kind regards,
Jon
-
The light cyan seems to be missing quite a lot of nozzles.
-
Have tried cleaning and soaking the nozzles but the light cyan seems to still be missing quite a few nozzles. Any suggestions as to what I can try to remedy this? It doesn’t appear I can just discharge and wash the light cyan on its own via the menu.
-
When you do a nozzle wash, does the cap hold the solution or does it drain away?
Stafford
-
Was hoping you might chime in Stafford. Hope you are well.
Yes, the solution fills the cap top and remains. -
OK, that would suggest the pump for that head is PROBABLY working correctly.
Next thing I would do would be to put it on a nozzle wash then switch it off at the back until the morning. That way it will sit on soak for 12 hours. If it’s no better in the morning then I would suggest you arrange for an engineer to inspect further. It could be that the cap is knackered or out of line, damper could be blocked or that the head has finally knackered. What’s the colour next to it like?
-
Sorry, scrap that, I just reread your post and it’s a CJV, not a JV3 😳
Can you post a good quality picture of the test draw? It would be handy to see how it’s failing and what the colours next to it are like. Whose inks are you using?
Stafford
-
A little tricky to get a decent shot with the phone but have attached a couple.
Inks are Signmaster SM3.
Kind regards,
Jon
Attachments:
-
They’re great, thanks.
OK, it’s not looking great for the right side of the head at all. It could be that the right side of the pump is failing? What are you running in the other 2 channels? White or flush?
My gut feeling is actually that the head has had a knock. The pattern you’re getting on the lm channel is looking like physical damage to the head. Just a hunch though, hopefully it’s not that. I would keep running nozzle washes and switching it off at the side over night and see if the pattern starts to recover. Otherwise, it would be worth getting a reputable engineer in to have a look, he can then try running channels in different orders, flushing head channels etc.
Stafford
-
Running white / silver in the other two.
Test prints haven’t been that bad with the light cyan before that I can remember and haven’t had any media strikes since last decent test pattern. I have had a couple minor ones in the past but were some time ago and has been printing ok since then.
Slim chance of a dodgy ink cart perhaps? Although running the SM3 inks in the others ok and as mentioned, the issue with the black was apparent before making the switch from genuine inks.
Who knows, maybe the SM3 inks have contributed to the deterioration of the head or the head was on the way out anyway being 5 years old and so just a coincidence.
Maybe another part as you say..The test pattern is slightly better after numerous cleans/washes but the blue lines in the grey prints are still present.
I will let it soak overnight and see. It is my only printer, besides the thermal, so needs fixing asap.
Please feel free to get in touch with me regarding an engineer in the event there isn’t a miraculous recovery!
o7969 zero 15 3llKind regards,
Jon
Log in to reply.
