Adam Seychell <
a_seychell@...> writes:
> Thats what I have observed too. If you look at it under a microscope
> then you can clearly see that line edges parallel to the print head
> travel axis are much less jagged than line edges perpendicular to the
> print head travel axis.
Actually, that's not what I see. There seems to be a gaussian
distribution of off-bys in both directions (vertical and horizontal).
If I enable bi-directional printing, there's an obvious duality to
that direction, but I think it's either (1) the various print heads
aren't aligned to each other, or (2) individual dots don't leave the
print head at a true 90 degrees each time.
One of these days I'm going to write a program to print my image with
only one of the jets and see, assuming I can wait all day for it to
print ;-)
> I'm sure most printers do not print at the resolution manufactures
> claim. I see pixelation errors when printing 6mil (0.2mm) lines from my
> Canon MP810. This printer is rated at 1200dpi (7 pixels in one 8mill
> line) yet I see some lines are significantly wider than others
> indicating the printer software is down converting the image to a lower
> resolution.
On my laser printer (600dpi) I don't use 6 or 8 mil lines. I use 6.67
or 8.33 mil lines, which are exact(ish) multiples of the print
resolution. Otherwise, yeah, some lines are wider than others by a
pixel.