[sane-devel] Fujitsu Double Feed Detect with sane , but not Windows Closed Driver

[m. allan noah]

On Sat, Jun 13, 2009 at 5:22 PM, Deon Bredenhann<deon at outprosys.com> wrote:
> Hi all
>
> I'm sitting with some obscure problem. Thanx to some input from allan, I
> found the the error from our python-imaging-sane module, is the
> double-feed-detect error. Now this error has been popping up more and more
> on a scanner at one of our clients offices. And roller replacement does not
> stop the double feed anymore. When scanning, double feed error pops up and
> scanning stops. You open the scanner, an lo and behold, there are two pages
> in the scanner. This means that our software works fine and detects the
> double feed as it should.
>
> Now for the completely freaky part. The service tech comes in to service the
> scanner, plug in his Windows laptop, use their own software and Fujitsu
> drivers and scans the batch without a single problem. Take the batch, put it
> through the scanner again, but plug it into the Linux box with sane, and
> df-error on the first page. Two pages stuck in the scanner. He claims that
> it is out software. I say that software doesn't pull two page into the
> scanner.
> How is this possible? He assured me the he has double feed detect on, and we
> confirmed it with counting the number of pages that comes out of the
> scanner. This is driving me bonkers. I'll be going out to the client this
> Monday to see for myself, but would like to know if any of you have seen
> this before.
>
> Running a Fujitsu fi-6670 and fi-6770 on Debian Lenny with sane 1.0.19

I did once hear from a fi-5900 user that he saw the windows driver
clear a jam by doing something funny with the rollers. He was unable
to reproduce, and one of my contacts at fujitsu had never heard of
this. Now, that said, there is something you could try: --df-action
Continue

For most machines this seems to just cause the machine to plow ahead
and ignore the df. Perhaps on this newer models it does some other
magic?

allan
-- 
"The truth is an offense, but not a sin"