Re: [Gimp-print-devel] RE: Epson 1520 issues

[David R. <dav...@ts...>]

Robert L Krawitz wrote:
> 
> Actually, in softweave mode it should be alternating between several
> small advances and one larger advance, although normally they're
> fairly close to equal in spacing.  

OK.  If the difference between the small steps and the big
steps is not that great, then it might appear as if there 
is only one size step.

> The fact that there's a difference
> between the positioning of the softweave and the microweave is
> probably an artifact of the fact that the softweave isn't correct.

I figured that might be the case, which is why I thought it 
might be a notable symptom to report.  Apparently the softweave 
code was taking four microscopic or zero sized steps (hard to 
tell the difference at 720dpi!) followed by one huge step.

Another observation about 1440dpi:  When the Windows driver
is printing in 1440x720dpi, the head moves across the page at
about half the speed as it does in 720dpi mode.  I assume it
does this in order to achieve the 1440dpi horizontal resolution
using one horizontal head pass.

> What do you mean about the image being lower than one would assume
> from the print dialog?
> 

The upper margin of the printable area for the 1520 is supposed to 
be 0.12".  When I place the image all the way against the top margin 
in the gimp-print dialog box, I would expect the top edge of the 
image to be somewhere around 0.12" from the top of the page, plus 
or minus some amount for paper alignment errors.  With the Windows
driver, this is generally what I get.  With the gimp-print driver,
when using the working 720dpi microweave mode, the top
of the image is somewhere around 0.5" to 0.75" from the top of
the page.  I am away from the printer right now, so I'm not sure
of the exact number, but I can make an exact measurement for you
in a few days.  I'll also double-check the windows results (I
haven't printed from windows for a while) and double check that 
the printer is loading the paper correctly.

-David