[sane-devel] Mustek ScanExpress A3 USB

[Jonathan Hipkiss]

I hate to say it but everything works fine in Windows, 24bit colour, 
600dpi full scan OK

Jonathan

Henning Meier-Geinitz wrote:

>Hi,
>
>On Sat, Aug 20, 2005 at 03:19:11PM +0100, Jonathan Hipkiss wrote:
>  
>
>>Has anybody had any problems with scanning at 600 dpi. It scans fine 
>>until about 350mm and then it sits still. When the image comes out it 
>>looks OK up to 350mm length (full width) and then it's random noise in 
>>the pic, up to its full size (about the remaining 5%).
>>    
>>
>
>I can reproduce that. After about line 8000, the scan head stops.
>
>  
>
>>If I scan at 300dpi, everything is fine.
>>    
>>
>
>Gray mode 600 dpi also seems to work.
>
>  
>
>>But it ignores what I enter and only scans to about 150mm length and 
>>again I just get noise for the remainder 80%.
>>    
>>
>
>It looks like the internal counter for the scanlines overflows. If you
>inncrease the top left y value, the start of the garbage decreases.
>Strange.
>
>At the moment, I don't know why this happens. The data sent to the
>scanner for the setup of the scan window seems to be correct.
>
>Can you check, if that also happens on Windows?
>
>Unfortunately (?), my WIndows installation has died so I can't test
>myself.
>
>Bye,
>  Henning
>
>  
>