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[DTG Brand] Problems with DTG Viper and magenta ink starvation and thin lines in print

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  • 1 Post By silverarrows
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Old April 22nd, 2012 Apr 22, 2012 7:52:47 PM -   #1 (permalink)
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Default Problems with DTG Viper and magenta ink starvation and thin lines in print

Hi,

I'm running a DTG Viper and for the most part it's great. However we're getting issues with the magenta ink from time to time. Sometimes the print is great but sometimes any red colour has thin lines running through it. Almost like tiny pin stripes.

It's not the designs either as sometimes they're perfect. We've asked for advice from the company that sold us the machine and they always say that there are known issues with magenta ink and DTG machines which I find a bit hard to fathom. They've so far told us we had old ink which was replaced and did the same thing and we've changed dampers, done pull throughs but it never really seems to fix the problem.

Anyone got any advice in this one?

Cheers,

Max
 
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Old April 23rd, 2012 Apr 23, 2012 9:33:38 AM -   #2 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

thin lines like banding ? Do you have a perfect nozzle check?
 
Old April 23rd, 2012 Apr 23, 2012 9:35:54 AM -   #3 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

I had a issue like this with my kiosk it turned out that i had a slight build up of ink on the printhead carrier , i thought it was clean but i ran my finger on the side and it had buggers. once i cleaned that up it was printining correctly again. i know you have a different machine but its worth a look
 
 
Old April 23rd, 2012 Apr 23, 2012 9:54:37 AM -   #4 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

Nozzle check will help if you could post a picture.

When you print red are you getting yellow showing through in the banding or is the banding a darker shade ?
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Old April 24th, 2012 Apr 24, 2012 2:41:20 AM -   #5 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

Quote:
Originally Posted by Inkster UK
Nozzle check will help if you could post a picture.

When you print red are you getting yellow showing through in the banding or is the banding a darker shade ?
I have the same problem and the yellow are showing through
Attached Images
File Type: jpg banding.jpg (137.1 KB, 94 views)
 
Old April 24th, 2012 Apr 24, 2012 5:37:28 AM -   #6 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

Quote:
Originally Posted by aju_jp
I have the same problem and the yellow are showing through
This looks like missing magenta.

If you print two consecutive nozzle checks is the result the same ?
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Old April 24th, 2012 Apr 24, 2012 8:24:56 AM -   #7 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

Quote:
Originally Posted by hori smoku
Hi,

I'm running a DTG Viper and for the most part it's great. However we're getting issues with the magenta ink from time to time. Sometimes the print is great but sometimes any red colour has thin lines running through it. Almost like tiny pin stripes.

It's not the designs either as sometimes they're perfect. We've asked for advice from the company that sold us the machine and they always say that there are known issues with magenta ink and DTG machines which I find a bit hard to fathom. They've so far told us we had old ink which was replaced and did the same thing and we've changed dampers, done pull throughs but it never really seems to fix the problem.

Anyone got any advice in this one?

Cheers,

Max

It's because of the bad magenta ink. Magenta has a very short shelf life. It tends to build up very quickly (almost like the white ink) I have to replace the print head twice a year, although it is not clogging the nozzles, it just makes the magenta nozzles to misfire and therefore banding problems on the printing. I claimed this to Dupont and didn't get any answer (as usual)
the best solution is throwing your printer out of the window and getting relieved from all this madness
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Old April 24th, 2012 Apr 24, 2012 3:43:11 PM -   #8 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

Quote:
Originally Posted by Inkster UK
This looks like missing magenta.

If you print two consecutive nozzle checks is the result the same ?
The nozzle check are perfect, it only happens when I print large block of red color.
 
Old April 24th, 2012 Apr 24, 2012 5:06:45 PM -   #9 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

Quote:
Originally Posted by silverarrows
It's because of the bad magenta ink. Magenta has a very short shelf life. It tends to build up very quickly (almost like the white ink) I have to replace the print head twice a year, although it is not clogging the nozzles, it just makes the magenta nozzles to misfire and therefore banding problems on the printing. I claimed this to Dupont and didn't get any answer (as usual)
the best solution is throwing your printer out of the window and getting relieved from all this madness
The exact same thing happend to me twice! First I would have a print head where the magenta was firing but it was out of alignment regardleass of how much I tried to clean the nozzle manually or trying to get a perfect head alignment from the utility. The other time, the magenta clogged on a different print head. I thought it was just a coincidence!
 
Old May 5th, 2012 May 5, 2012 3:32:37 AM -   #10 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

Quote:
Originally Posted by hori smoku
Hi,

I'm running a DTG Viper and for the most part it's great. However we're getting issues with the magenta ink from time to time. Sometimes the print is great but sometimes any red colour has thin lines running through it. Almost like tiny pin stripes.

It's not the designs either as sometimes they're perfect. We've asked for advice from the company that sold us the machine and they always say that there are known issues with magenta ink and DTG machines which I find a bit hard to fathom. They've so far told us we had old ink which was replaced and did the same thing and we've changed dampers, done pull throughs but it never really seems to fix the problem.

Anyone got any advice in this one?

Cheers,

Max
There are 2 main causes for this problem.

1. Nozzle deflection - Look closely at the nozzle check and make sure all the step lines are straight.

2. Colour profiles - In my experience some DTG printers find it hard to recreate certain shades or red using CMYK, but other very similar shades print perfectly. Using corrected colour curves for the specific ink does cure some of this problem, but not all of it. If you can replace the red in the image with a shade that you know works (by writing down the CMYK value of the colour), this will get you around this issue. Or you could try sending the colour layer on a lower resolution but send 2 colour layers, this also works. Some customers also change the printing option from bi-di to uni-di, which also resolves this. Obviously time consuming options, but known to get around the problem.
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Old May 8th, 2012 May 8, 2012 1:05:27 PM -   #11 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

Am also having the exact same problem. Same as picture in post above. I have tried changing the color profile and head cleanings with no luck. Any new ideas?
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Old October 24th, 2015 Oct 24, 2015 6:12:53 AM -   #12 (permalink)
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Question Problems with DTG Viper, nozzle check only print cyan - and not other colors

Hi I am new here and also new to DTG printing. I replace FFC (data/head) cables and powering up was good - no issues except for non genuine, no mnt tk etc messages which i got through.

Charged inks to the printhead (white and color) but on doing a couple of head cleaning to ensure inks get through. Observed at the capping station only cyan was coming out and into the waste tank. Nozzle check only printed cyan. Did a couple more heading cleaning and nozzle check interchangeably, still no visible sign of yellow, magenta black or white at the capping station or waste tank. Did about 4 powercleans still no go. Placed a mirror under the printhead and see droplets of cyan ink randomly on the face of printhead. Printhead is new, replaced white ink dampers. Haven't replaced cmyk dampers though. Cleaned the cappping station, rubber seal and surrounding at the capping station. Cleaned the encoder strip but not the encoder sensor. Any thoughts why i am not getting other colors on nozzle check?

Thanks in advance, Paul
 
Old October 24th, 2015 Oct 24, 2015 8:05:52 AM -   #13 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

you may want to change your dampers or check the print head, if any of the screws were loose putting it back together then its not level and getting enough suction from the pump and cap
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Old October 24th, 2015 Oct 24, 2015 8:05:30 PM -   #14 (permalink)
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Default Re: Problems with DTG Viper and magenta ink starvation and thin lines in print

Quote:
Originally Posted by DTGPRINTERPARTS
you may want to change your dampers or check the print head, if any of the screws were loose putting it back together then its not level and getting enough suction from the pump and cap
Hey Anthony, thanks for the note. I will check for loose screws and replace the dampers for colors (yellow, magenta, black and white). Another other suggestions?
 






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