[sane-devel] Mustek 1200CP apparently skipping lines

[Eddy De Greef]

On 2003.03.14 21:25 Pigeon wrote:
> I have a Mustek 1200CP scanner and the latest versions of sane:
> [...]
> It appears that the scanner carriage is advancing two steps when the
> software thinks it has only advanced one step. Scanning anything
> larger than half the length of A4 results in the carriage attempting
> to overrun the end of its travel with unpleasant slipping of gears.
> All scans come out "squashed" and need to be expanded 2:1 in the
> vertical direction.

Does it happen at all resolutions?

What you describe looks as if you are using the 1200CP settings on 
a 600CP. I presume that you are sure that it's a 1200CP ?

You could try the 600CP setting and see what it gives.

Another thing you could try is to disable fast skipping in your 
mustek_pp.conf, eg.:

scanner Mustek_1200CP 0x378 1200
  option slow_skip

But be careful and limit the height of the scans to at most 1/2 of
the page. The gear slipping isn't very healthy.
 
> Also, the light flashes on and off rapidly during the scan; I am not
> sure if this is related.

It normally flashes about 1 time per second, but it isn't controlled by
the driver. 

Eddy