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Topic: color change due to repair? h e l p ! ! !

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color change due to repair? h e l p ! ! !

Now that is something interesting...

As you can see in another thread (entitled Very weird thing with Oce CS6060) we had some problems with our machine. Well, the guys from Oce finally came and replaced the electronic circuit board to which the flat string cables are connected. They also upgraded the firmware.

Guess what?

Yes, the colours changed. Now using the same media, same profile, same ink... the colours are different. Obviously the change is not very substantial, but still... the colours are different. And we have a big reprint coming up for our customer and we have to match the colours that we used to have... What a joke...

All i can do now is make a new profile, but the problem is that i've been so far running on factory profiles provided along with my Caldera RIP. And i can't guarantee that the profiles would bring me closer to the old desired colours... Oh gosh...

Now, it seems that each machine has its own colours. We have a CS 6060 and a CP 64s and from the start they were printing differently. I actually find it very hard to believe how much difference between identical machines can take place... And now this change of colours after a repair... Unbelievable...

Anyone with the same story? Let me know. Let us all know.

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Oh boy, that's a tough spot.


There are two things that I would try right away. First, see if the color shifted obviously in one direction. If so just try reducing/adding to the ink limits to see if you can get it to shift back. That is how I got our 100 and 64 to look very close in color. Otherwise, just to get the reprint done, I would try to adjust the color in the file. It will probably be easier to do that than get a new profile dialed in on time. Odds are the icc profile for the old profile will still be good, it is just a matter of the machine laying down slightly different amounts of ink than before.



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I had a similar issue and what happened was the tech changes the , I want to say amps at the heads to allow more ink to flow. This is suppose to reduce clogged nozzles but in tern puts more inkl down. Changing you total ink coverage in your profile should fix this but you will need to do some tests to see what is thje correct ink coverage.

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Thanks guys... Well the actual difference seems not very big obviously, it was visible in one file quite obviously, but not necessarily in others.

But! Here's a little but. It seems that now that the Oce is repaired, it actually has almost exactly the same colours as the Seiko!

Bear in mind that they are almost equally old, equally well taken care of and are run from one computer using one rip and exactly the same profile. So before that repair, they were not producing exactly the same output. There were some substantial shifts that disallowed us from running the same production on two machines, obviously as long as the customer really verified the colours that closely.

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I had problems like this on our old Arizona 180 last year. A board blew out after a bad thunder storm and after being replaced certain colors were different. This was a huge headache as many of our clients are government agencies buying graphics for their emergency vehicles. These vehicles get into a lot of accidents and require replacement graphics all the time. I had to rematch the colors for a ton of different kits. Trying to fix all the profiles proved to be impossible, so we went back to the old ones and changed the colors in the files to match as close as possible. I finally convinced the owner to kick the 180 to the curb, but now I get to match all the old kits to the Seiko.

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Drifting away from the topic, it's actually very interesting what you say about the government agencies. Here i don't think any signage for such agencies get printed digitally. It's usually cut from coloured vinyls, mostly reflective ones and printed using screen printing, cuz it's cheaper and better (no halftones, no problem) :)

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Greg wrote:


I had a similar issue and what happened was the tech changes the , I want to say amps at the heads to allow more ink to flow. This is suppose to reduce clogged nozzles but in tern puts more inkl down. Changing you total ink coverage in your profile should fix this but you will need to do some tests to see what is thje correct ink coverage.


Greg might be right, new board, new firmware = new factory adjusted head voltage = different volumn of ink = different density. Might be a good if you keep track of your head voltage.



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walter_cfl wrote:

Greg wrote:
I had a similar issue and what happened was the tech changes the , I want to say amps at the heads to allow more ink to flow. This is suppose to reduce clogged nozzles but in tern puts more inkl down. Changing you total ink coverage in your profile should fix this but you will need to do some tests to see what is thje correct ink coverage.

Greg might be right, new board, new firmware = new factory adjusted head voltage = different volumn of ink = different density. Might be a good if you keep track of your head voltage.




Well yeah, i guess i just never did that. Shame on me. Thanks Walter.

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