# Re: Horizotal offset with Mustek SE 6000 SP

Dr. Andreas Bolsch (a.bolsch@ic.ac.uk)
Fri, 15 Jan 1999 11:51:10 +0000

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My experiments with my SE-12000SP have shown that the
top 2.5mm (approx.) get lost even if the scanner is
instructed to start at the very top. Regarding the
left edge there is an offset of less then 1mm. And
the vertical scale is distorted (compared to
the nominal resolution, i.e. 600dpi) by about 1%.

However, 0.5inch is not acceptable. I'd suspect a
mechanical defect. You might check the total scanning area with sheet of
raster paper.(Not very precise
though). And check whether this problems shows up
under Windows, too.
The y-coordinate zero (referenced to the triangle
at the top *right*) is just multiplied by a scale
factor and otherwise unaltered embedded in the
SET_WINDOW command. AFAIK that value is interpreted
as an unsigned number, so a negative offset (which
would be necessary in your case) can't be specified.

Oh, just to be sure we are thinking of the same
edge: By "left" you mean left edge of a sheet, so
when placed face down it's the right edge of the
scanning area, isn't it?

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