[sane-devel] Art project

m. allan noah kitno455 at gmail.com
Tue Jul 13 16:10:40 UTC 2010


Your English is better than my French, so don't apologize! Honestly, I
do not know of a good scanner for this. All of the scanners I have
used will only scan up to some 1 meter length at most.

allan

On Tue, Jul 13, 2010 at 11:52 AM, karim moreau <karimmoreau at gmail.com> wrote:
> Thanks a lot for your request pardon my English, i'm French...
> Whan you say "or a very stupid flatbed which relies upon the driver to
> detect the end of the bed." did you have a idea to find the good product ?
> Because the ADF machine are too less shinny to do what i want..
> Thanks a lot again
> Bonne journée
> Karim
>
> 2010/7/10 m. allan noah <kitno455 at gmail.com>
>>
>> Modifying the hardware is the easy part.
>>
>> The problem here is that many scanner chipsets don't understand the
>> idea of longer length scanning. They have one or more internal
>> registers that hold the length of the scanned area and/or the length
>> of the scanner bed, so that the motor can slow and stop before
>> striking the end of the bed. Most machines don't give the programmer
>> access to those registers.
>>
>> I think what you need is either an ADF machine with long-scanning
>> support (which you have to convert into a flatbed), or a very stupid
>> flatbed which relies upon the driver to detect the end of the bed.
>>
>> The cardscan 800c is a combination of those two ideas, a very dumb ADF
>> machine. But, it is very narrow.
>>
>> allan
>>
>> On Sat, Jul 10, 2010 at 2:36 PM, Mark Van den Borre
>> <mark+sane at markvdb.be> wrote:
>> > Karim,
>> >
>> > I am not a sane developer, but I wonder if you have considered
>> > sheetfed scanners like the Xerox Travel Scanner 100? One can make
>> > these scan never ending lengths of paper.
>> >
>> > Mark
>> > sane user
>> >
>> > 2010/7/10 karim moreau <karimmoreau at gmail.com>:
>> >> Hello.
>> >> I'm currently working on an artistic project and am looking for someone
>> >> with
>> >> technical knowledge (developer, engineer,…) to help me with advice and
>> >> / or
>> >> assistance.
>> >>
>> >> Basically, what I am trying to do is to modify a desktop scanner so as
>> >> to
>> >> significantly increase the size of the scanning surface.
>> >>
>> >> See figure here : http://www.upian.net/schema.jpg
>> >>
>> >> What I want to do is, starting with a basic A4 or A3 scanner, to cut it
>> >> and
>> >> increase substantially the scanning surface "B" of the scanner.
>> >>
>> >> For instance, an A4 scanner uses a 21cm wide sensor that can scan a
>> >> 29,7cm
>> >> long surface, from point "p1" to point "p2"
>> >>
>> >> The idea is to cut the scanner and to increase its length in order to
>> >> allow
>> >> him to scan a significantly longer surface, up to a point "p3" that
>> >> could be
>> >> 2m from point "p1".
>> >>
>> >> The material aspect of that project isn't going to be a problem for me.
>> >> But
>> >> what I need help for is the software part of the problem : for the
>> >> driver of
>> >> the scanner has to be partially rewritten or modified so as to allow
>> >> the
>> >> tracks of the scan to run all the way through (point "p3") but also to
>> >> produce an image that has the new proportions of the scanner.
>> >>
>> >> Depending on what you are advising, I'm also ready to invest in a
>> >> specific
>> >> model, if you think the driver of that specific scanner is going to be
>> >> easier to reprogram / modify.
>> >>
>> >> Thank you very much for any input, advice or help : I'd really like to
>> >> be
>> >> able to pull this through, so please do not hesitate to share any
>> >> thoughts
>> >> you have on this, wether you think this is doable or not.
>> >>
>> >> --
>> >> Karim Moreau
>> >> 76 rue de la jonquiere
>> >> 75017 paris
>> >> 06 22 18 91 55
>> >> karimmoreau at gmail.com
>> >>
>> >> --
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>> >
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>>
>>
>> --
>> "The truth is an offense, but not a sin"
>
>
>
> --
> Karim Moreau
> 76 rue de la jonquiere
> 75017 paris
> 06 22 18 91 55
> karimmoreau at gmail.com
>



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



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