Pressure loss on black, air leak in tubing connector?

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itfben
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Re: Pressure loss on black, air leak in tubing connector?

Post by itfben » Sun Mar 26, 2017 5:11 pm

Black lines have reduced, must have been dust making it worse thank you for that tip but still not perfect when printing black squares, slight fuzz around edges

My print is still pants though.

Not sharp at all and I always print on low head height and highest quality. I'm using good quality lg adhesive media.

I've tried saving the same illustrator file as a .pdf .eps .jpg

Printing with a supplied profile - maybe it's not the correct lg profile? Also tried "generic vinyl" 1 & 2 although don't know the difference.

All have been similar poor quality grainy print see attached.
IMG_5752.JPG
Last edited by itfben on Sun Mar 26, 2017 5:20 pm, edited 1 time in total.

itfben
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Re: Pressure loss on black, air leak in tubing connector?

Post by itfben » Sun Mar 26, 2017 5:12 pm

In all the above I've tried "sign&display" "pre-press Europe" "max-density"

None improve my grainyness

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mrtn
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Re: Pressure loss on black, air leak in tubing connector?

Post by mrtn » Sun Mar 26, 2017 6:49 pm

If your bi-dir is adjusted perfectly then there are no more tips for a 4-colour machine.

How's the nozzle test print?
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itfben
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Re: Pressure loss on black, air leak in tubing connector?

Post by itfben » Mon Mar 27, 2017 5:16 pm

Redone bi-directional alignment and most were pretty good. Tweet a couple but not by much

See nozzle test. I know my blacks not great but bad enough to be giving me my poor print (especially on parts like aa light blue colour)?
image.jpg
Nozzle test on lg media
image.jpg
Is the black usually this low res. on test prints?
FYI: The cyan and magenta and new heads.



See another poor print tried on an different media I had kicking about.
image.jpg
Ink hasn't sat right on this media (poltape)

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mrtn
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Re: Pressure loss on black, air leak in tubing connector?

Post by mrtn » Mon Mar 27, 2017 5:43 pm

K head is FUBAR. Yellow is bad, M and C are moderately bad.

Are you using some cheap ink?
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itfben
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Re: Pressure loss on black, air leak in tubing connector?

Post by itfben » Mon Mar 27, 2017 6:34 pm

So you reckon I need another 2 heads? ££££££ :-(

Is it actually going to get things sorted though

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mrtn
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Re: Pressure loss on black, air leak in tubing connector?

Post by mrtn » Mon Mar 27, 2017 6:42 pm

Yellow will do for for a while but black is really bad.

You will need to find out what is causing the head damage in such a short time.
Mechanical damage from head crashes?
Bad ink?

DX4 heads are extremely durable, I have printers from 2005 and 2006 with original heads running perfect.
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itfben
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Re: Pressure loss on black, air leak in tubing connector?

Post by itfben » Mon Mar 27, 2017 7:00 pm

Is the head causing my grainy print though?

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mrtn
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Re: Pressure loss on black, air leak in tubing connector?

Post by mrtn » Mon Mar 27, 2017 7:13 pm

Yes.
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itfben
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Re: Pressure loss on black, air leak in tubing connector?

Post by itfben » Tue Mar 28, 2017 12:10 am

Surely my blue wouldn't have any black in it though?

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