sane-umax1220u(5)

NAME
sane-umax1220u - SANE backend for the UMAX Astra 1220U scanner

DESCRIPTION
The sane-umax1220 library implements a SANE (Scanner Access Now Easy) backend for the the UMAX Astra 1220U scanner. For the latest information on this backend, please visit http://umax1220u-sane.sourceforge.net/.

UMAX ASTRA 2000U EXPERIMENTAL SUPPORT
This backend may also be able to drive the UMAX Astra 2000U. Some people are successful with it, others report that the colors come out terrible. Your milage may vary. From Stephane (the author of sane-umax_pp), I learned that there are differences in the way the color calibration is performed on the 1220U and the 2000U and it may account for the problem. Stephane's backend support the 2000P, the parallel port sibling to the 2000U. It may be possible to use ideas and code from Stephane's backend to add complete support for the 2000U to this backend. Since I do not have access to an Astra 2000U, I do not plan to work on this - any volunteers?

CONFIGURATION
The configuration file for this backend resides in @CONFIGDIR@/umax1220u.conf. Its contents is a list of device names that correspond to UMAX Astra 1220U scanners. Empty lines and lines starting with a hash mark (#) are ignored. A sample configuration file is shown below:
 #usb vendor product
 usb 0x1606 0x0010
 # Device list for non-linux systems
 /dev/scanner
 /dev/usb/scanner0
When driving a Astra 2000U, use the product number 0x0030. See sane-usb(5) for information on how to set the access permissions on the usb device files.

FILES

The backend configuration file:
    @CONFIGDIR@/umax1220u.conf

The static library implementing this backend:
    @LIBDIR@/libsane-umax1220u.a

The shared library implementing this backend:
    @LIBDIR@/libsane-umax1220u.so (present on systems that support dynamic loading)

ENVIRONMENT

SANE_DEBUG_UMAX1220U
    If the library was compiled with debug support enabled, this environment variable controls the debug level for this backend. E.g., a value of 128 requests all debug output to be printed. Smaller levels reduce verbosity: SANE_DEBUG_UMAX1220U values
    Number  Remark

     1       print failures
     2       print information
     3       print high-level function calls
     4       print high-level function checkpoints
     9       print mid-level function calls
     10      print mid-level function checkpoints
     80      print protocol-level function entry
     90      print protocol-level function exit

Example:
    export SANE_DEBUG_UMAX1220U=10

KNOWN BUGS
600 dpi scanning may fail for large image sizes. If you keep getting I/O errors, try cycling the power on your scanner to reset it. There is no way to cancel a scan, since the driver ignores sane_cancel(). If you try scanning an image which is too small, you will get I/O errors. Be sure to adjust the scan area before doing a scan, since by default, the scan area is zero.

SEE ALSO
sane(7), sane-usb(5)

For latest bug fixes and information see
    http://umax1220u-sane.sourceforge.net/

AUTHOR
Marcio Luis Teixeira <marciot@users.sourceforge.net>

EMAIL-CONTACT
umax1220u-sane-devel@lists.sourceforge.net

REPORTING BUGS
When reporting bugs, please run the backend with SANE_DEBUG_UMAX1220U set to 10 and attach a copy of the log messages.