[sane-devel] scanimage cannot see Umax Astra 2100S scanner.

[Oliver Rauch]

Hello Russ,

the difference between the quality calibration and normal calibration
is the number of lines = the size of the area that is used to calibrate.
For normal calibration there are used a few lines, for quality calibration
about 60 lines are used. When the calibration area is clean and dustfree
then there is no problem with the normal calibration.

I am not sure why the quality calibration fails.
The firmware output of your debug looks like a Astra 2100S model.
I know taht the quality calibration did work for other people with an
Astra 2100S. I also know that the quality calibration works on some
Astra 2200 systems. It may depend on the scanner, but it also
can depend on the scsi controller or other things.

Oliver


Am Samstag, 14. Februar 2004 16:01 schrieb Russ Pitman:
> Oliver Rauch wrote:
> > Hello Russ,
> >
> > may be your scanner is a relabled Astra 2200S
>
> I looked up the CD that was supplied with the scanner.
>
> The label says (SCSI models and Astra 2200 USB+SCSI)
>
> > (UMAX seems to mix the motherboards of some scanners
> > in the last time). In this case the following may help:
> >
> > Disbale the option "quality calibration" in the
> > standard-options window of xsane or
> > for scanimage use --quality-cal=no
>
> Both these options work fine. BTW are there issues with not being able to
> use the quality calibration option apart from the obvious one :-)
>
> My thanks to all those on the list who took the trouble to help.

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