[sane-devel] Q: improving epson2 for Epson 12000XL
paddy-hack at member.fsf.org
Tue Sep 29 10:15:09 BST 2020
Wolfram Sang writes:
> Hi Olaf,
>> Actually, I've found a reference in my dead tree specs that all other
>> values with the one byte limit are supported. 0x00 through 0x39 are
>> below the glass plate, 0x41 through 0xfe are above. Units unknown but
>> based on your observation of 0x59 being 25 steps away from 0x40 and it
>> corresponding to 2.5mm, I'd hazard a guess its 0.1mm assuming a linear
> That is my assumption as well. But please note that the 0x59 value comes
> from Alessandro Zummo and was already existing in the epson2 driver.
I think you mean the epson backend. The 0x40 and 0x59 values trace back
to commit 64e36892a1, made on 2001-11-10.
> I did not verify it yet because I was only scannning on glass. We
> might need a custom value later in case we build some frame, too, to
> avoid glass on glass contact. We will see.
Looking forward to your findings,
Olaf Meeuwissen, LPIC-2 FSF Associate Member since 2004-01-27
GnuPG key: F84A2DD9/B3C0 2F47 EA19 64F4 9F13 F43E B8A4 A88A F84A 2DD9
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