[Printers] Minolta MagiColor 2210

[Michael Sleator]

This is clearly the same code scheme as Eduardo Luis extracted from his
Epson C1900.  See:
	http://frotz.zork.net/pipermail/printers/2005-October/000033.html
	http://frotz.zork.net/pipermail/printers/2005-October/000046.html
	http://frotz.zork.net/pipermail/printers/2005-October/000053.html
	http://frotz.zork.net/pipermail/printers/2005-October/000054.html
	http://frotz.zork.net/pipermail/printers/2005-October/000055.html

In the attached image, I've taken his scan and yours, extracted a sample
of the pattern from each, and overlaid them.  I chose the two vertically
aligned dots at the top of the band as a convenient visual reference, but
I still don't have much to go on to determine the horizontal phase.

I haven't had much time to look at the actual data, though I have noted
that, so far at least, it appears that there can be from zero to three
dots in any column and from zero to four in any row.  Neither rows nor
columns seem to have a simple parity rule.

In this image, the blue channel is the Minolta 2210 and the red channel
is the Epson C1900, so dots in common show up as magenta.

regards,
Michael Sleator
sleat at sleator.com

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>I have access to a Minolta MagiColor 2210, and have posted a scan of a
>test page at http://www.pedantic.org/~mike/printers/, along with HTML and
>ASCII representations of the dot pattern.
>
>The pattern is 24 dots wide and 16 dots long.  Horizontally, it repeats
>without gaps.  Vertically, it repeats without gaps but shifted to the right
>8 dots.  I do not know where the pattern "starts", so the HTML and ASCII
>representations may be misleading in that respect.
>
>I have printed several test pages on different days, and there does not
>appear to be any time- or usage-variability to the pattern.  The printer
>does not seem to have a serial number available through the built-in
>HTTP server or printed on the front or sides.  The printer does have an
>ethernet MAC address, which may be what it's encoding.  However, the
>ethernet card appears to be removable and may just be an option, so it
>seems more likely that there is a serial number of some kind that it is
>using.
>
>If anyone has any questions, or has seen any other printers with a 24x16
>pattern, please let me know.
>
>-- 
>Michael Thorpe
>mike at pedantic.org
>
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