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

Stéphane VOLTZ stefdev at modulonet.fr
Fri May 5 05:20:39 UTC 2006


Le Jeudi 27 Avril 2006 12:32, Benedict a écrit :
> Hi,
> I'd need help in fixing "the head not stopping at the end problem."
> Here is the hardware information:
> lsusb
> Bus 005 Device 001: ID 0000:0000
> Bus 004 Device 001: ID 0000:0000
> Bus 003 Device 004: ID 046d:c03e Logitech, Inc. Premium Optical Wheel Mouse
> Bus 003 Device 001: ID 0000:0000
> Bus 002 Device 004: ID 03f0:0901 Hewlett-Packard ScanJet 2300c
> Bus 002 Device 001: ID 0000:0000
> Bus 001 Device 003: ID 0ea0:6858 Ours Technology, Inc.
> Bus 001 Device 001: ID 0000:0000
>
>
> scanimage -L
> device `genesys:libusb:002:004' is a Hewlett Packard ScanJet 2300c flatbed
> scanner
>
> It works like a charm but the head doesn't go back and makes a lot of noise
> at the end of the scanning area. Is there an easy fix for this?
>
> --
> Benedict

	Hello,

	The scanning head may be going to far for at least 3 reasons:
	- the defined scan area for 2300 is too wide for your device
	- origin detection fails and there is an offset toward the "bottom" of the 
scanning area.
	- your model has an unkown motor, and command sent move the scanning head too 
far.

	In order to fin out what is going wrong, try to scan only the "top" of a 
picture with 'scanimage --mode Color -h 200 >scan.pnm'. If the picture is ok, 
but is missing the top part, it is surely a problem with origin detection. If 
the image is vertically distorted, it is a motor issue.

	In any case, send to the list (if the zipped data are below 40K size), and me 
the scan.log file produced by doing:
export SANE_DEBUG_GENESYS=255
export SANE_DEBUG_GENESYS_GL646=255
scanimage --mode Color -h 200 2>scan.log >scan.pnm
	There will also some debug pnm files created: 'search_position16.pnm' 
and 'search_position.pnm' for origin detection, please send them with the 
log.

	Last, which version of sane backends do you use?  Be sure to run at least 
version 1.0.17. CVS version has a couple of interesting fixes, so it may be 
worth to try it.

Regards,
	Stef


	



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