[sane-devel] Canon LiDE 25 scanner

[Gerhard Jaeger]

Hi Stephan,

On Wednesday 28 September 2005 23:27, Stephan February wrote:
> hello
> 
> On Wednesday 28 September 2005 22:23, Gerhard Jaeger wrote:
> > hmmm, I thought my last mail was quite clear!
> > I don't think it's necessary to snoop the USB traffic - it's necessary to
> > find out the correct clock values...
> 
> Armed with Gerard's suggestion, I have been playing around with the timings 
> and motor speed settings for my Canon LiDE 25.

thanks for that.

> Here is a motor/timing setting which currently works well for me, and without 
> the previous annoying grinding noises. It also looks like my problems with 
> saned are related to previously reporting "timing" issues when network 
> scanning. The latter I've confirmed by doing a saned scan via localhost.
> 
> Please comment if you see anything obviously wrong or dangerous here 'cause I 
> really just fiddled until I was satisfied.

if it's working, everything is fine ;)

> 
> >>>>>>>> snip <<<<<<<<<
> 
> { MODEL_CANON1200, 8, 51, 9,
>    /* Motor settings (PWM and PWM_Duty) */
>    /* <=75dpi       <=100dpi      <=150dpi      <=200dpi      <=300dpi  */
>    {{ 8, 31, 1 }, { 8, 31, 1 }, { 8, 31, 1 }, { 8, 31, 1 }, { 8, 31, 1 },
> 
>    /* <=400dpi      <=600dpi      <=800dpi      <=1200dpi     <=2400dpi */
>    { 8, 31, 1 }, { 8, 31, 1 }, { 8, 31, 1 }, { 8, 31, 1 }, { 8, 31, 1 }},
>    /* Color mode MCLK settings */
>    { 9.0, 9.0, 9.0, 9.0, 9.0, 9.0, 9.0, 9.0, 9.0, 9.0 },
>    { 9.0, 9.0, 9.0, 9.0, 9.0, 9.0, 9.0, 9.0, 9.0, 9.0 },
>    /* Gray mode MCLK settings */
>    { 7.0, 7.0, 6.0, 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 }
> },

just wondering, why the MCLKs are that high - ain't the scans too slow?

> >>>>>>>>> snip <<<<<<
> 
> ... and ...
> 
> >>>>>>> snip <<<<<<<<
> /** Canon LiDE25 */
> static HWDef Hw0x04A9_0x2220 =
> {
>         0.80,   /* dMaxMotorSpeed (Max_Speed)                     */
>         0.200,  /* dMaxMoveSpeed (Max_Speed)                      */
>         0.0,    /* dHighSpeed                                     */
> >>>>>>>> snip <<<<<<<
> 
> If I were to create a patch, would it be better if an entirely new section for 
> the LiDE25 was created e.g.?
> 
>   .
>   .
>  { MODEL_LIDE25, 8, 51, 9,
>    /* Motor settings (PWM and PWM_Duty) */

I'll do that and submitt it to CVS today...


Thanks again for that work.
Gerhard