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 journ?e > 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 >> >> >> >> -- >> >> sane-devel mailing list: sane-devel at lists.alioth.debian.org >> >> http://lists.alioth.debian.org/mailman/listinfo/sane-devel >> >> Unsubscribe: Send mail with subject "unsubscribe your_password" >> >> ? ? ? ? ? ? to sane-devel-request at lists.alioth.debian.org >> >> >> > >> > -- >> > sane-devel mailing list: sane-devel at lists.alioth.debian.org >> > http://lists.alioth.debian.org/mailman/listinfo/sane-devel >> > Unsubscribe: Send mail with subject "unsubscribe your_password" >> > ? ? ? ? ? ? to sane-devel-request at lists.alioth.debian.org >> >> >> >> -- >> "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"
