[sane-devel] switching of scanner light in Epson Perfection 1640SU

Olaf Meeuwissen paddy-hack at member.fsf.org
Sun Apr 19 03:17:40 BST 2020

Hi Markus,

Markus writes:

> Dear all,
> I own a Epson Perfection 1640SU flatbed scanner. Is there a way to turn
> of the lamp inside the scanner via the sane backend during scanning?
> I'd like to scan numerous slides with DIY illumination from top. The
> transparency unit takes only six at a time and when using it, the
> scanned area is automatically reduced to the smaller opining of the
> TPU.

TTBOMK, none of the backends (epson, epson2, epkowa) that support your
scanner have this ability.  Also, according to the device's protocol
specification there is no (documented) command to do so :-/

Sorry that doesn't help,
Olaf Meeuwissen, LPIC-2            FSF Associate Member since 2004-01-27
 GnuPG key: F84A2DD9/B3C0 2F47 EA19 64F4 9F13  F43E B8A4 A88A F84A 2DD9
 Support Free Software                        https://my.fsf.org/donate
 Join the Free Software Foundation              https://my.fsf.org/join

More information about the sane-devel mailing list