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Help with mimaki jv3 prints
Aaaaaaaah
Hi,
Hoping for some help.
After a distance 2-3m it becomes very noticeable that the black changes colour as the print continues from a standard grey green tinge to a blue tinge, it will then repeat the process for the next print [if panelling]
Having real problems getting prints to match up alongside each other especially greyscale large wallpaper images.
Has anyone experienced this? it never used to be an issue, using Mimaki Inks
Tried:
Profiles, old and current Shiraz versions, different files, materials, had an engineer look at the machine and spoke to my favourite Mimaki guy.
Not noticing anything on the confidence strip.I’m at a loss and it’s causing real problems and costing money, about to paint out a wall 😕
Thanks Very Much
Andrew
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17 Replies
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too expensive to carry on i would try printing full width solid colours about 4-5 ins deep and look at them under a big magnifying glass to see which one if fading away.
my guess would be the yellow all colours are used in less than about 60% black, very much doubt if its software.
are you printing faster than normal because of the size ? -
Dampers causing ink starvation between ink pump cleaning cycles?
Cheap to replace them.
John
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Thanks
Chris that’s pretty interesting as there can be a wee bit of a yellow halo around fine print/images, I print as standard 360 x 720……will try the solid blocks as soon as.
I’ll give you a quick call John….Cheers
Appreciate all thought as I do need to get it sorted.
Using the monoprint option in Shiraz worked fine although it produces a lighter print, joins were good.
The change is progressive however that progression start all over again from the start as soon as another panel is processed by the rip (?) -
haven’t u traded it in yet for a l26500? thats more suitable for your work and cheaper to run.
anyway… firstly are u still on original ink? if ur on foreign stuff then that is a cause
has the file been thru corel draw? we get the green tint on grey on the uv printer sometimes and that is profiled.
describe how you getting it to the RIP? is this got any embedded profiles, is a cmyk working space?
printing grey is the hardest thing to do!
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Hi Dave…still on original ink, it happens with all files whether pdf, vector ai, jpg even patterns…..Tried just about every type of file!
If it’s a full colour CMYK print with a load photographic colour changes it’s hardly noticeable however if it’s grey scale or duotones etc it’s no use.
Not going to buy a new machine Dave…….Changes over Commitments 😀
As the saying goes: ‘If you always do what you’ve always done you’ll always get what you’ve always got"
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and is that material off white?
shiraz and jv3-160s is not a perfect combination…. oddly enough, I have greater control over black levels now then I ever had 🙂
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any material Dave…Cheers
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Have you checked for air ingress Andrew?? Air being drawn in at the dampers would cause ink starvation. Print would be OK to start with then start to cause problems after a while printing, cleaning or leaving for a while allows the ink to top up again so problem seems to be fixed but obviously isn’t.
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Just a quick thought……try printing direct to the printer using the Mimaki Windows printer driver not using the RIP…..if the result is the same it is a printer hardware issue……if not then it is RIP software related.
PS I have some Mimaki dampers here if you need them.
John
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This is indeed a very strange fault Andrew is having. I’ve seen a whole host of Shiraz/Mimaki setups and this one has me stumped. Andrew has tried pretty much everything I can think of and it doesn’t seem to change!! We’ve checked out the printer, RIP, media, inks, environment, power…. Still, no joy.
Short of me travelling up to see you Andrew, I still have no idea what to suggest next I’m afraid. I still have the samples you sent me sat on my desk here in a hope to randomly stumble upon an idea when least expecting it but it’s not happened yet.
Stafford
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Might sound silly but is your room temp changing while the printer is running? I.e. space heater coming on or large door letting all the heat out?
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After months of problems the issue was finally resolved.
I had been told by a call out engineer it was most definitely not a hardware problem and that the problem was with either the RIP, the files or the profiles. After doing so many tests I couldn’t work out how it wasn’t a problem with the machine.
In the end I decided to pay for Stafford to come up as he has a good understanding of the machine and the software. After a day of testing he reckoned he had the solution but would have to come back up when a new yellow head and 2 pumps arrived.
It worked…..There had been an electrical fault! with the yellow head and even though it was showing as printing fine on the confidence strip it would stop firing.
Thanks for all your help, just done a couple of walls that did not need painting out 😉
I was stuck, I have a maintenance contract however if an engineer is sure its not a printer problem I had to start a process to resolve it myself.
On a positive note I’ve learnt a lot and know all the little peculiarities of the various versions of Shiraz 🙂
Thanks everyone – Cheers Stafford – and Chris you were right it was the yellow 😉
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Awesome Andrew 😀
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Good to hear Andrew and well done Stafford for helping solve the problem. 😀
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Excellent news!!
I’m glad it’s all sorted once and for all now, it really was a strange fault. The yellow would only stop firing after about a metre of print, althought as Andrew said, the confidence/colour strip was still firing all the way along the print.
I hope some confidence has been restored in the machine now, as you should just be able to walk away and leave it printing as before.
If I can help at all in the future, just give me a call.
Stafford
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Not a leaky head? the seal inside it?
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No, it was an electrical fault of some description. There was a quite a large amount of yellow overspray around the media guides and platen which made me suspect the yellow in the first place.
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