Need Help JFX200-2513EX White ink seepage issue

[Jim Hancock]

I have a customer who has this printer. He is printing wood signs that consist of 3 1x4 boards that are held together on the back with wood slats. These are placed in a jig for placement. Do to height variations in the boards due to the wood itself, we have to add some extra media thickness to compensate so we don't get head crashes. When we do this, we are getting white ink seepage which eventually accumulates enough to cause banding in the white background layer. We did a series of tests using mat board so we were printing on a flat plane, without the various dimensional height differences introduced with the jig and the wooden signs. What we have determined is with the media thickness set to the correct value, i.e., the mat board thickness and the 1.5 mm head gap, we had no seepage. When we added .5 mm to the thickness, we started getting seepage. When we added 1 mm, the seepage was worse. I'm being told the new head layout design creates some kind of vortex that causes this issue when the media thickness is increased beyond the actual value. Are any of the users of this printer experienced this issue and were you able to solve it? The printer has been checked as far as negative-positive pressure and the head voltage is correct.

 

[Adam Vreeke]

I know it may be a dumb question but, are you running this unidirection? I run a lot of uneven wood through our machine often times at a higher head height as you suggest and I mostly need to switch to unidirection.

 

[Jim Hancock]

It occurs in both Uni & Bi-directional printing. He prints both these 3 board signs and single wooden blocks. We are running the boards in Uni now due to image quality issues in Bi-dir. The blocks we can print in Bi-dir due to thickness consistency.

Are you using this same model of printer. The EX is the latest model.

 

[Adam Vreeke]

I see, I missed the EX in the title. I am running the older generation. But I have ran into the bleeding issue before, especially on white ink. Is there a varnish on the wood, or stain, is there a deep texture to the wood? I have much better results when the finish is a smooth clear coat on it with some troubles with a tail affect if it is just stained. Another solution I found is printing down a clear first (if he has it) as a base layer. Some woods I need to do this at 100% while others only a 10% or 50% depending on the wood and finish.

 

[Jim Hancock]

Keep in mind, my issue isn't bleeding on the wood. The issue is ink seepage accumulating on the bottom of the white head during printing and eventually covering up enough nozzles to cause banding. And only on the white head. The printer was installed 3 weeks ago. I'm all over the dealer about it. My primary involvement is as a consultant, not as a tech, as it is under warranty and I don't touch warranty printers for obvious reasons. I will take a pic tomorrow to post and show the issue. Just trying to determine if the increased head-media gap is the real culprit and if anyone else has experienced this and solved it.

Printing clear first is something I will try to see if it makes a difference.

 

[balstestrat]

No way to set sporadic wiping?

 

[Adam Vreeke]

I see I took it as seepage into the wood. Not ink accumulation. Only thing I can think other than pausing and doing a cleaning on it when you start to see it starting to band would be the pressure adjust which you said you double checked. Other than that only thing I think that could cause that might be a static issue. I would try to wipe down with a de-static solution or at the very least some alcohol might do the trick. Is there an ion bar on that machine and if so check to make sure the connection secure and turned on.

 

[Solventinkjet]

ust trying to determine if the increased head-media gap is the real culprit and if anyone else has experienced this and solved it.

I had a customer with a standard JFX200 who was printing on a similar substrate. He also had issues with the heads clogging up. Unfortunately the only remedy was to just stop doing that job. Mimaki has a PDF describing the jig requirements and they are very specific about not having any gaps where the head height might be too high. Wish I had a solution for ya!

 

[Jim Hancock]

Can you send me the PDF? Dealer never said a word and they know he is using jigs...

 

[Jim Hancock]

Not a static issue. Also using the ionization bar.

 

[Jim Hancock]

Seepage buildup occurs to quickly for wiping interval to work in a productive work flow.

 

[Solventinkjet]

I couldn't find it for some reason but I'll send it over once I figure out where I got it in the first place!

 

[Jim Hancock]

Most appreciated!

 

[gelink]

I have a customer who has this printer. He is printing wood signs that consist of 3 1x4 boards that are held together on the back with wood slats. These are placed in a jig for placement. Do to height variations in the boards due to the wood itself, we have to add some extra media thickness to compensate so we don't get head crashes. When we do this, we are getting white ink seepage which eventually accumulates enough to cause banding in the white background layer. We did a series of tests using mat board so we were printing on a flat plane, without the various dimensional height differences introduced with the jig and the wooden signs. What we have determined is with the media thickness set to the correct value, i.e., the mat board thickness and the 1.5 mm head gap, we had no seepage. When we added .5 mm to the thickness, we started getting seepage. When we added 1 mm, the seepage was worse. I'm being told the new head layout design creates some kind of vortex that causes this issue when the media thickness is increased beyond the actual value. Are any of the users of this printer experienced this issue and were you able to solve it? The printer has been checked as far as negative-positive pressure and the head voltage is correct.

 

[gelink]

is ink problem ! specialy with Lus 170 or Lus 200
we have french supplier ink Uvled Dubuits ink with chip
gel-ink.com

 

[Pauly]

is ink problem ! specialy with Lus 170 or Lus 200
we have french supplier ink Uvled Dubuits ink with chip
gel-ink.com

Pretty sure you need to be a merchant member to advertise your product..

 

[Volkan CANSU]

[QUOTE = "Solventinkjet, gönderi: 1509507, üye: 31133"] Bir sebepten dolayı bulamadım ama nereden aldığımı anladığımda göndereceğim! [/ QUOTE]
Ne istediğinizi tam olarak anlamadım size yardımcı olmak isterim türkiye den sds mimaki teknik den volkan ben

 

[Volkan CANSU]

[QUOTE = "Solventinkjet, gönderi: 1509507, üye: 31133"] Bir sebepten dolayı bulamadım ama nereden aldığımı anladığımda göndereceğim! [/ QUOTE]
Pdf dosyaları sizinle paylaşabilirim istediğiniz dosyaları bana Bildiriniz