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From: Olaf Meeuwissen
Sent: Tuesday, September 29, 2020 2:14 AM
To: Wolfram Sang
Cc: [email protected]
Subject: Re: [sane-devel] Q: improving epson2 for Epson 12000XL

Hi Wolfram,

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

>> ramp.

> 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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Re: [sane-devel] Q: improving epson2 for Epson 12000XL

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