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HI Allan,</div>
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Thanks for your input. For my purposes I probably won't need to scan beyond 40 inches. I use the scanimage frontend on the command line. Where can I find information on how to modify the SANE backend for this model? If the value for document length is somehow
sent to the scanner before the scan then I would like to be able to put in my own values for this. I think this way I could discover what the firmware limit is. Do you know where can I find information on how to modify the Canoscan 9000F backend driver or
any information related to modifying/enhancing SANE scanner drivers? Thanks.</div>
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Mike</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> m. allan noah <kitno455@gmail.com><br>
<b>Sent:</b> 31 August 2020 20:03<br>
<b>To:</b> Michael Rose <bugfixer@hotmail.co.uk><br>
<b>Cc:</b> sane-devel@alioth-lists.debian.net <sane-devel@alioth-lists.debian.net><br>
<b>Subject:</b> Re: [sane-devel] Canon Canoscan 9000F customise document length</font>
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<div class="PlainText">There is no reason to think that any particular scanner will support<br>
that capability. Many of them get information about the total length<br>
of the scan before they start, and there is a firmware limit to that<br>
value.<br>
<br>
You will need a simplistic scanner that just streams data of an<br>
indeterminate length until the host stops asking for data.<br>
<br>
allan<br>
<br>
On Mon, Aug 31, 2020 at 3:05 PM Michael Rose <bugfixer@hotmail.co.uk> wrote:<br>
><br>
> Hello everyone,<br>
><br>
> I'm new here so please forgive me if I'm not doing things right. I was hoping someone could help me. I am trying to modify a Canonscan 9000F scanner so that I can scan A4 width documents of any length beyond 11.7 inches. I can modify the scanner enclosure
and extend or replace the glass platter. I need help with modifying the sane backend driver. Does anyone know if this is possible? How would I go about doing this? I Any suggestions would be most welcome. Thanks.<br>
><br>
> Mike<br>
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<br>
-- <br>
"well, I stand up next to a mountain- and I chop it down with the edge<br>
of my hand"<br>
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