QTR-Quadtone RIP

Hey Chris,

The 7600 user guide just says that Print Adj "adjusts the intensity of
the micro weave pattern; improves quality but lowers printing speed."
I haven't read anything more technical than that. 

I didn't do a thorough test of print quality at 1 thru 9, so I don't
have results to compare to yours. I was having banding problems myself
a while ago and just increased Print Adj to 9, which reduced (but
didn't eliminate) banding. I haven't noticed a drop in printing speed
but in any case I'd always choose quality over speed (for final prints
anyway).

The other adjustments which together eliminated banding for me:

- putting suction on Low (doesn't make sense since I'm using average
to thick paper, but it helped)
- setting PFA to +.20 (minor but noticeable improvement)
- setting the shadow ink limit to –20 (most of my banding was in the
70-100 levels of the test gradient) 

This essentially eliminated banding at 720 dpi. Then to make the
prints even smoother, I print at 1440.

Instead of testing on actual prints, I'd recommend testing using a
gradient, to pinpoint where banding occurs. Then after you tune out
banding in the gradient, all your picture files should print fine.

Hope this helps,

Mark 

--- In QuadtoneRIP@yahoogroups.com, "cwb1946" <cb@...> wrote:
>
> Thanks Mark.  
> I had looked into this on a previous occasion, with little luck, and
was going to revisit it 
> this morning more carefully.  I am curious if you have found any
technical information on 
> what these these settings actually do?  I didn't notice any linear
progression from 1 to 9, in 
> fact it seemed sort of random. What have your observations been in
this regard?  
> 
> This banding seems to depend on the file: some print perfectly
smooth, some very 
> banded; and some values smooth, some banded in the same print!  (It
doesn't seem to be 
> a paper feed problem. )
> 
> Chris   
> 
> --- In QuadtoneRIP@yahoogroups.com, "Mark McCarvill"
<espresso_forte@> wrote:
> >
> > Hi Chris,
> > 
> > You can adjust the intensity of the micro-weave manually via the
> > printer's control panel. It's under SelecType > Paper Config > Print
> > Adj. The default is something like 5 but I keep mine at the max, which
> > is 9.
> > 
> > Mark 
> > 
> > --- In QuadtoneRIP@yahoogroups.com, "cwb1946" <cb@> wrote:
> > >
> > > I am used to using the "Super MicroWeave setting in the Epson 7600
> > driver to get rid of 
> > > horizontal (print head direction) banding.  When using QTR this
> > control is not available.  Does 
> > > anyone have an alternate work around to accomplish the same results?
> > > 
> > > Chris
> > >
> >
>