[sane-devel] bug with Canon N1240U in Lineart mode at 75 dpi?

[Gerhard Jaeger]

On Sunday 05 December 2004 01:37, Eric Ding wrote:
> Gerhard Jaeger <gerhard@gjaeger.de> wrote:
> > you might wanna try and tweak the motor settings, checkout file
> > plustek-usbdevs.c and search for MODEL_CANON1200, you will find something
> > like:
>
> [snip]
>
> >   /* Gray mode MCLK settings */
> >   { 6.0, 6.0, XXX.0, 6.0, 6.0, 6.0, 6.0,  6.0,  6.0,  6.0 },
> >   { 6.5, 6.5, 6.0, 6.0, 6.0, 6.0, 8.0, 12.0, 12.0, 12.0 }
> >  },
> >
> > tweak the settings for "Gray mode" and <= 150dpi (where the XXX is
> > located), you may increase the value to 7 or 8...
>
> Well, that certainly improved things!  If I change the value to 7.0 or
> 8.0, scanning at 75dpi in Lineart now works. It does *not* work if the
> value is changed to 6.5.
>
Ah, okay I see. I'll add 7.0 to the source with the next update. Thanx for
testing.

Gerhard