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Robert L Krawitz | 1 Jun 2006 01:38
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Couple more small changes to the Epson driver

1) I increased the density of matte black ink on the R2400 to match
   the R800/R1800.  It does appear to yield significantly darker
   black.

2) I changed the default breakpoint from unidirectional to
   bidirectional to generate smoother output at very high resolutions
   (1440x1440 and above on R2400; 2880x1440 and above on R800/R1800).

--

-- 
Robert Krawitz                                     <rlk <at> alum.mit.edu>

Tall Clubs International  --  http://www.tall.org/ or 1-888-IM-TALL-2
Member of the League for Programming Freedom -- mail lpf <at> uunet.uu.net
Project lead for Gutenprint   --    http://gimp-print.sourceforge.net

"Linux doesn't dictate how I work, I dictate how Linux works."
--Eric Crampton
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Gene Heskett | 1 Jun 2006 02:42
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Minor request

Greetings;

Where, in that grand path between firefox, and one of my epson C8x 
family printers, can one find the code that positions the header/footer 
data that FF prefixes, or postfixes to each page it prints when one does 
the pulldown and issues the print page(s) command from the FF menu?

I ask because I'm tired of trying to  figure out what is being printed 
in these areas.

For the header data, the top of the characters, and the left 
justification seem to be ok, but the upper right corner is badly 
clipped, as if it thinks the letter paper is about 8.55" wide.

Likewise, the bottom left, where it should say "Page xx of xx", the 
"Page " is missing, off the left edge of the paper, and the whole line 
is missing the bottom 2 dots of a 5x7 character matrix as its displaced 
off the bottom of the paper, while the lower right phrase also has 
portions of the last char lopped off over the right edge of the paper.

So what file do I play with to fix this?

--

-- 
Cheers, Gene
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Robert L Krawitz | 1 Jun 2006 03:32
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Re: Minor request

   Date: Wed, 31 May 2006 19:42:45 -0500
   From: Gene Heskett <gene.heskett <at> verizon.net>

   Greetings;

   Where, in that grand path between firefox, and one of my epson C8x
   family printers, can one find the code that positions the
   header/footer data that FF prefixes, or postfixes to each page it
   prints when one does the pulldown and issues the print page(s)
   command from the FF menu?

   I ask because I'm tired of trying to  figure out what is being printed 
   in these areas.

   For the header data, the top of the characters, and the left 
   justification seem to be ok, but the upper right corner is badly 
   clipped, as if it thinks the letter paper is about 8.55" wide.

   Likewise, the bottom left, where it should say "Page xx of xx", the
   "Page " is missing, off the left edge of the paper, and the whole
   line is missing the bottom 2 dots of a 5x7 character matrix as its
   displaced off the bottom of the paper, while the lower right phrase
   also has portions of the last char lopped off over the right edge
   of the paper.

   So what file do I play with to fix this?

If you're using 5.0.0-rc3, set the printer to Borderless.

--

--
(Continue reading)

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regisr | 1 Jun 2006 23:13
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Re: Couple more small changes to the Epson driver

On Wed, 31 May 2006 19:38:41 -0400
Robert L Krawitz <rlk <at> alum.mit.edu> a écrit:

> 1) I increased the density of matte black ink on the R2400 to match
>    the R800/R1800.  It does appear to yield significantly darker
>    black.

On the R2400:
As I wrote previously (but very badly) the black printed with matte ink
is lighter when selecting "matte ink" than "photo ink" (always with the
MK cartridge). I selected this by error!

The patch to escp2-papers.c don't change anything.
I am trying to set parameters to obtain good results  in B&W With
default settings the light area are too clear (with a 21 steps file
the 20% patch is white. What is the better setting to use: Gamma,
black curve... ? Could you give me an advice about this?

The file doc/gutenprint-options seems to be disappeared in the last
snapshot (and may be previous). Is it normal?

Gray transitions settings are not available on R2400 ?

Sincerely,
--

-- 
regis
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Robert L Krawitz | 2 Jun 2006 01:32
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Re: Couple more small changes to the Epson driver

   Date: Thu, 1 Jun 2006 23:13:08 +0200
   From: regisr <regisr <at> pobox.com>

   On Wed, 31 May 2006 19:38:41 -0400
   Robert L Krawitz <rlk <at> alum.mit.edu> a écrit:

   > 1) I increased the density of matte black ink on the R2400 to match
   >    the R800/R1800.  It does appear to yield significantly darker
   >    black.

   On the R2400:
   As I wrote previously (but very badly) the black printed with matte ink
   is lighter when selecting "matte ink" than "photo ink" (always with the
   MK cartridge). I selected this by error!

OK.  However, when I looked at it more closely, I could get darker
black by increasing the amount of matte black, so this helped anyway.

   The patch to escp2-papers.c don't change anything.  I am trying to
   set parameters to obtain good results in B&W With default settings
   the light area are too clear (with a 21 steps file the 20% patch is
   white. What is the better setting to use: Gamma, black curve... ?
   Could you give me an advice about this?

What settings are you currently using?

   The file doc/gutenprint-options seems to be disappeared in the last
   snapshot (and may be previous). Is it normal?

It's moved into the release notes (NEWS).
(Continue reading)

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Robert L Krawitz | 2 Jun 2006 01:48
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Re: Couple more small changes to the Epson driver

   Date: Thu, 1 Jun 2006 23:13:08 +0200
   From: regisr <regisr <at> pobox.com>

   On Wed, 31 May 2006 19:38:41 -0400
   Robert L Krawitz <rlk <at> alum.mit.edu> a écrit:

   > 1) I increased the density of matte black ink on the R2400 to match
   >    the R800/R1800.  It does appear to yield significantly darker
   >    black.

   On the R2400:
   As I wrote previously (but very badly) the black printed with matte ink
   is lighter when selecting "matte ink" than "photo ink" (always with the
   MK cartridge). I selected this by error!

OK.  However, when I looked at it more closely, I could get darker
black by increasing the amount of matte black, so this helped anyway.

   The patch to escp2-papers.c don't change anything.  I am trying to
   set parameters to obtain good results in B&W With default settings
   the light area are too clear (with a 21 steps file the 20% patch is
   white. What is the better setting to use: Gamma, black curve... ?
   Could you give me an advice about this?

What settings are you currently using?

   The file doc/gutenprint-options seems to be disappeared in the last
   snapshot (and may be previous). Is it normal?

It's moved into the release notes (NEWS).
(Continue reading)

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regisr | 2 Jun 2006 21:18
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Re: Couple more small changes to the Epson driver

On Thu, 1 Jun 2006 19:48:46 -0400
Robert L Krawitz <rlk <at> alum.mit.edu> a écrit:

>    The patch to escp2-papers.c don't change anything.  I am trying to
>    set parameters to obtain good results in B&W With default settings
>    the light area are too clear (with a 21 steps file the 20% patch is
>    white. What is the better setting to use: Gamma, black curve... ?
>    Could you give me an advice about this?
> 
> What settings are you currently using?

It was with default settings:

InkSet String True "ultra3matte"
PrintingDirection String True "Unidirectional"
MediaType String True "WaterColorRadiant"
PrintingDirection String True "Unidirectional"
Gamma: 1, density: 1  
Brightness 1, Contrast 1 
LinearContrast True True
DitherAlgorithm String True "HybridEvenTone" 
ImageType String True "None"

(without the last patch, I'll apply it after sending this email)

Sincerely,
--

-- 
regis
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Robert L Krawitz | 3 Jun 2006 00:12
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Re: Couple more small changes to the Epson driver

   Date: Fri, 2 Jun 2006 21:18:01 +0200
   From: regisr <regisr <at> pobox.com>

   On Thu, 1 Jun 2006 19:48:46 -0400
   Robert L Krawitz <rlk <at> alum.mit.edu> a écrit:

   >    The patch to escp2-papers.c don't change anything.  I am trying to
   >    set parameters to obtain good results in B&W With default settings
   >    the light area are too clear (with a 21 steps file the 20% patch is
   >    white. What is the better setting to use: Gamma, black curve... ?
   >    Could you give me an advice about this?
   > 
   > What settings are you currently using?

   It was with default settings:

   InkSet String True "ultra3matte"
   PrintingDirection String True "Unidirectional"
   MediaType String True "WaterColorRadiant"
   PrintingDirection String True "Unidirectional"
   Gamma: 1, density: 1  
   Brightness 1, Contrast 1 
   LinearContrast True True
   DitherAlgorithm String True "HybridEvenTone" 
   ImageType String True "None"

   (without the last patch, I'll apply it after sending this email)

The last patch will give you darker grays overall with matte black ink.
(Continue reading)

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Richard Scobie | 3 Jun 2006 09:53
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Re: Couple more small changes to the Epson driver


Robert L Krawitz wrote:

> 2) I changed the default breakpoint from unidirectional to
>    bidirectional to generate smoother output at very high resolutions
>    (1440x1440 and above on R2400; 2880x1440 and above on R800/R1800).

Hi Robert,

I am curious about why this achieves a better result, as I thought 
unidirectional was the better option at high res.

Does it add some "mechanical dither", that reduces patterning or something?

Regards,

Richard
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regisr | 3 Jun 2006 13:55
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Paper feed in R2400

Hello!

I have a trouble with the single sheet feeder (rear) on the R2400.
I thinked that the problem was caused by the paper but I can reproduce
it.

On first print  loading is good, printing occurs, paper is ejected.
on next print loading is good but when printing the paper is going
back and I have a loading error. I eject the paper ('roll button'), 
aknownledge/cancel the error (button 'sheet/trash') .
I can retry ... after few tries (5 ore more) it works!  If I
power-down/power-up I can print again.

May be a reset command can solve this issue?
--

-- 
regis
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Gmane