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 <mark%2Bsane 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20100713/2d49a5a7/attachment-0001.htm>