A couple comments about the new "2880 super"; selection.
The larger Pro printers are not affected including 3800, 3880, and all 4000 and up printers.
The printers with this additional option are:
R2400, R2880, R3000, P600, P800
1400, 1430, R800, R1800, R1900, R2000 (which could also be P400, thanks Walker).
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For those interested:
There are two major functions in the driver that get talked about a lot:
1) Dithering (Ordered, Hybrid etc) determines which positions on the page get a drop of ink. At any
particular resolution there are fixed locations which may or may not get a drop of ink. Its kind of like
a huge sheet of graph paper at say 2880x1440dpi. Dithering assigns drops to locations -- yes or no.
2) Weaving is a completely separate function that determines which jet in the head will lay down that
drop of ink. With 180 jets per ink there are a gazillion possibilities - think: in a sq in you have about 4 million
positions, each one could have a different jet, times 8 inks, times total size of paper. Physically
many of these are not possible since jets can only hit some locations in a pass.
Theoretically this should not make any difference. But because of manufacturing variations all jets
are not identical and even quite small differences can be seen if many mis-sized, mis-positioned jets
and drops are all lined up. This is what you see when you see banding. Our eyes are incredibly
capable of picking this sort of thing up.
So weaving is the process that comes to the rescue. It organizes passes such that all 180 jets are
always used but the image is slowly formed using different jets for drops close to each other. If there's
a jet that's a little off its drops will not be seen near each other so banding patterns with not build up.
It's a complicated and memory intensive algorithm. The Pro printers have this implemented inside
the actual printer -- so Epson code and not controlled by the driver i.e. QTR driver. The small printers
though have this done in the driver itself so QTR driver can vary this algorithm.
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So the "2880 dpi" and "2880 super" selections are both 2880x1440dpi layouts -- the graph paper locations.
No difference in the dither at all. All the positions for drops of ink are the same.
The difference is the weave. Double the number of passes and first pass for a set of drop positions can
leave half of the potential drops off. A pass (many later) will eventually fill in all those left out positions
using a different jet. This cuts down the likelihood of banding but incurs the cost of more time for the
extra passes. The top and bottom ends of the paper are affected more, each printer varies a bit,
and your particular workflow may vary. So this is something for each to try and see if its worth it.
Roy