Walker,
Thanks, but I think we can safely rule those causes out. (I hope.)
Until just a day or two ago, it was not possible to test with the Epson
driver as QTR was completely necessary for this work.
I can theoretically test it now with the Epson driver, but I don't think
that will solve anything, and I cannot force the problem to occur so
have now way of knowing if any testing of the Epson driver is giving
valid results. I forgot to mention that when this does occur for me,
running two or three prints through the machine makes the problem go
away. In more humid climes, it persists much longer.
Even if the Epson driver solved the railroad track problem, it wouldn't
solve the problem. ;-) If using the Epson driver works for RR tracks, it
is still too ham fisted a tool for this kind of work on a regular basis.
Only QTR is sufficiently sophisticated.
If you mean choosing a different kind of dither in the QTR driver, that
didn't work either.
Also, this problem does not occur with Epson's larger printers, only the
smaller ones.
On 10/26/18 8:37 AM, ';forums@walkerblackwell.com'
forums@... [QuadtoneRIP] wrote:
> This may actually be more head-alignment and dither related than
> roller-related . . . verify head alignment and print with the epson
> driver (with a similar ink load) to ensure that these same tracks
> actually appear in that environment. If they don’t, you know it’s
> something about nozzle timing. Improper nozzle timing or weave/dither
> errors can cause something very similar.
--
David Kachel
_________________________
Artist-Photographer
Fine B&W Photographs & Photogravures
Inventor of Selective Latent Image Manipulation Techniques
Message
Re: [QuadtoneRIP] Skidmarks & Railroad Tracks
2018-10-26 by Walker Blackwell
My suggestion to test with the epson driver was less about solving the problem but instead to hopefully eliminate a few variables to home in on the exact problem (or combo of problems). In general it seems to be a combo of ink amount and paper humidity and roller pressure but these things are complicated and it may be something else entirely.
I have a lot of experience with this printer and it’s very rare that I see this problem. (Like one out of every 500 or 600 prints).
-w
On Fri, Oct 26, 2018 at 11:13 AM David Kachel david@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote: