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

[m. allan noah]

On Sat, Jun 13, 2009 at 6:45 PM, m. allan noah<kitno455 at gmail.com> wrote:
> 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?

But now that I think about it- you might need to upgrade to 1.0.20 or
the latest git snapshot to get the more advanced df options.

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