[sane-devel] Canonscan N 650U LIDE Scanner does not scan but makes terrible noise

[Gerhard Jäger]

On Thursday 29 August 2013 08:14:53 Andrea Vai wrote:
> Hi, thank you for the reply. With the essential help from Gerhard we
> seem to have found the issue. See below.
> 
> Il giorno mer, 28/08/2013 alle 20.29 +0000, coxster dillon ha scritto:
> > The only thing I can think of, that maybe different between Sane on
> > Linux and Twain on Windoze is simply perhaps the speed or more
> > specifically the timing between commands issued.  I do not know the
> > scanner API in detail enough to be more specific.  If you send the
> > steps to the motor rather than say go to position Y, then the timing
> > of those steps is probably important.
> 
> That makes sense, as Gerhard suggested me:
> -----------------------------------------------------------------------
> Are you able to compile the Plustek backend? If yes, you might play
> with the following values in the file plustek-usbdevs.c @ line 2064 and
> 2065
> 
> There you see the following:
> ** Canon N650U/N656U */

STOP!

Coxter is talking about a LiDE30! That's why I pointed to another 
code section. 

While writing the support for LiDE20 and 30 I already did the USBsnoop
stuff - you're welcome to repeat...

- Gerhard