[sane-devel] GL646 genesys, 2300c head problem

[Stéphane VOLTZ]

Le Vendredi 5 Mai 2006 12:06, Mark Hatton a écrit :
>
> The latest version in CVS fixes another issue with the 2300c for me. The
> stable version only lets you scan once and then the scanner can't be
> accessed again unless it is powered off and on again. The version in the
> CVS HEAD seems to solve that.
>
> When accessing the scanner using XSane, the default settings make the
> scanner head crash in to the end of the scan bed (giving the horrible
> noise). However, if I lower the length of the scan area by as little as
> 2mm, the problem goes away and the scan head stops and returns properly.
>
> I have looked for a way to change the value of the available scanning
> area but I can't find it. If someone can tell me which file it is
> defined in, I am happy to change it myself and give it a try.
>
> Thanks,
>
> Mark

	Hello, 

	look at genesys_devices.c in the backends sub-directory. Line 529 there a 
struct that describes the geometry for the 2300. You'll have to adjust 
the "Start of scan area in mm (x_offset)" value, or the  "Size of scan area 
in mm (y) ". From your mail, I guess that a value of SANE_FIX (295.0) would 
do the job:

static Genesys_Model hp2300c_model = {
  "hewlett-packard-scanjet-2300c",      /* Name */
  "Hewlett Packard",            /* Device vendor string */
  "ScanJet 2300c",              /* Device model name */
  GENESYS_GL646,
  NULL,

  {600, 300, 150, 75, 0},       /* possible x-resolutions */
  {1200, 600, 300, 150, 75, 0}, /* possible y-resolutions, motor can go up to 
1200 dpi */
  {16, 8, 0},                   /* possible depths in gray mode */
  {16, 8, 0},                   /* possible depths in color mode */

  SANE_FIX (-2.0),              /* Start of scan area in mm (x_offset) */
  SANE_FIX (-2.0),              /* Start of scan area in mm (y_offset) */
  SANE_FIX (215.9),             /* Size of scan area in mm (x) */
  SANE_FIX (297.1),             /* Size of scan area in mm (y) */

  SANE_FIX (0.0),               /* Start of white strip in mm (y) */
  SANE_FIX (1.0),               /* Start of black mark in mm (x) */

  SANE_FIX (0.0),               /* Start of scan area in TA mode in mm (x) */
  SANE_FIX (0.0),               /* Start of scan area in TA mode in mm (y) */
  SANE_FIX (100.0),             /* Size of scan area in TA mode in mm (x) */
  SANE_FIX (100.0),             /* Size of scan area in TA mode in mm (y) */

  SANE_FIX (0.0),               /* Start of white strip in TA mode in mm (y) 
*/

  16, 8, 0,                     /* RGB CCD Line-distance correction in pixel 
*/

  COLOR_ORDER_RGB,              /* Order of the CCD/CIS colors */

  SANE_FALSE,                   /* Is this a CIS scanner? */
  CCD_HP2300,
  DAC_WOLFSON_HP2300,
  GPO_HP2300,
  MOTOR_HP2300,
  GENESYS_FLAG_REPARK
    | GENESYS_FLAG_14BIT_GAMMA
    | GENESYS_FLAG_SEARCH_START
    | GENESYS_FLAG_MUST_WAIT
    | GENESYS_FLAG_DARK_CALIBRATION | GENESYS_FLAG_OFFSET_CALIBRATION,
  9,
  132
};


	Let me know the values that work best, I'll put them in CVS.

Regards,
	Stef