I have found, assuming I was seeing the same problem with my work,
as you are seeing with your work, the importance of printing at 360
DPI v. 300 DPI. Notice that all Epson printer resolutions going with
the travel of the print head, AND with the travel of the paper feed
are multiples of 180. My 1280 is 180,360,720,1440,2880 in the
direction of the print head, and I believe 720 in the direction of
the paper feed. I think (have heard and now confirmed by my own
tests) that printing at ANY resolution other than one that is evenly
divisble by 180, causes a problem with the dither pattern AND/OR the
ability of the driver to MICROWEAVE, especially in the direction of
the paper feed. I was getting faint hints of lines, patterns sort
of, parallel to the direction of the print head travel,
perpendicular to the direction of the paper feed. I changed the
resolution in PS to 360 (a multiple of 180), and the print is smooth
as silk. Give it a try, it might solve your problem. Hope it does.
All the best,
kevin logan
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "copal01"
<copal01@y...> wrote:
> The test was printed with turning off bi-directional printing and
> 1440 dpi
> manuel
>
>
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Steven
> Karafyllakis" <steve@s...> wrote:
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "copal01"
> > <copal01@y...> wrote:
> > > I think that they parallel to the head movemnt.See this link
to
> > see a
> > > gray scale print with black only.
> > http://www.pbase.com/mcc01/head_dots
> >
> > The test you have posted shows only wether or not the bi-
> > directionalprinting is working properly; if you can't get
perfect
> > alignment between the top and bottm sections of each line, TURN
OFF
> > BI-DIRECTIONAL PRINTING! Mis-alignment of this type can cuase
all
> > sorts of weird problems from simple loss of sharpness
> > to 'herringbone'patterns. Unless you can get it absolutely
perfect
> > (and confirm that by checking with a lupe for double dots where
> > there should be only one)its better to just give up the speed
and
Show quoted textHide quoted text
> > turn it off. If you are printing with it off, then forget that
> > particular alignment test, it is irrelevant.
> >
> > Steve Karafyllakis
> >
> > >
> > >