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<TITLE>sane-devel: Re: Problem with scan quality using UMAX Astra 1220S</TITLE>
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<META NAME="Author" CONTENT="Rod Pike (rodneyp@utanet.at)">
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<META NAME="Subject" CONTENT="Re: Problem with scan quality using UMAX Astra 1220S">
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<H1>Re: Problem with scan quality using UMAX Astra 1220S</H1>
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<!-- received="Mon Jan 29 12:34:35 2001" -->
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<!-- name="Rod Pike" -->
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<!-- subject="Re: Problem with scan quality using UMAX Astra 1220S" -->
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<STRONG>From:</STRONG> Rod Pike (<A HREF="mailto:rodneyp@utanet.at?Subject=Re:%20Problem%20with%20scan%20quality%20using%20UMAX%20Astra%201220S&In-Reply-To=<20010129213453.A769@utanet.at>"><EM>rodneyp@utanet.at</EM></A>)<BR>
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<STRONG>Date:</STRONG> Mon Jan 29 2001 - 15:34:54 PST
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<P>
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<LI><STRONG>Next message:</STRONG> <A HREF="0315.html">Oliver Rauch: "Re: sane,saned und XSane/Windows"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0313.html">Ian Cartwright: "Re: xsane-0.71 source available"</A>
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<P>
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On Thu, Nov 16, 2000 at 10:45:49PM +0100, Oliver Rauch wrote:
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<BR>
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<EM>> Rod Pike wrote:
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</EM><BR>
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<EM>> > As I can get good scans running TWAIN, I'm doubtful that I have a
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</EM><BR>
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<EM>> > hardware problem.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> We had several cases in which a hardware bug only was visible
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</EM><BR>
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<EM>> under linux. Linux does use the hardware in a harder and more
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</EM><BR>
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<EM>> intensive way so that problems may occur that are not visible
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</EM><BR>
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<EM>> under windows.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> > Are there any ways of tweaking the SCSI driver properties?
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> Take a look at /usr/src/linux/drivers/scsi
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</EM><BR>
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<EM>> and read the docs or the beginning of the sourcecode
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</EM><BR>
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<EM>> of your scsi driver.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> I think it will be a problem of your Mainboard BIOS
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</EM><BR>
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<EM>> or of the linux support for your mainboard chipsets.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> Bye
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</EM><BR>
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<EM>> Oliver
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> --
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</EM><BR>
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<EM>> Homepage: <A HREF="http://www.wolfsburg.de/~rauch">http://www.wolfsburg.de/~rauch</A>
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</EM><BR>
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<EM>> sane-umax: <A HREF="http://www.wolfsburg.de/~rauch/sane/sane-umax.html">http://www.wolfsburg.de/~rauch/sane/sane-umax.html</A>
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</EM><BR>
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<EM>> xsane: <A HREF="http://www.wolfsburg.de/~rauch/sane/sane-xsane.html">http://www.wolfsburg.de/~rauch/sane/sane-xsane.html</A>
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</EM><BR>
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<EM>> E-Mail: mailto:<A HREF="mailto:Oliver.Rauch@Wolfsburg.DE?Subject=Re:%20Problem%20with%20scan%20quality%20using%20UMAX%20Astra%201220S&In-Reply-To=<20010129213453.A769@utanet.at>">Oliver.Rauch@Wolfsburg.DE</A>
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> --
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</EM><BR>
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<EM>> Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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</EM><BR>
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<EM>> To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20Problem%20with%20scan%20quality%20using%20UMAX%20Astra%201220S&In-Reply-To=<20010129213453.A769@utanet.at>">majordomo@mostang.com</A>
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</EM><BR>
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<P>Just an update. I finally found out what the problem was with the scan
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<BR>
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quality. I recently upgraded my motherboard and re-introduced an old
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<BR>
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motherboard. I tried scanning on all three computers and all exhibited
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<BR>
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the same problem ruling out the mainboard as the culprit.
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<BR>
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<P>I've been powering my scanner using the 12V supply from my computer
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<BR>
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power supply. I noticed that if I powered the scanner with one computer
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<BR>
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while scanning using another computer, the scans were cleaner. I went
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<BR>
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out and bought an external supply and now the scans don't have the
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<BR>
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problems I was seeing before. It appears that there must have been some
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<BR>
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sort harmonic interference generated that corrupted the scanning of the
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<BR>
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image. Go figure!
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<BR>
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<P>I'm still intrigued as to why scanning from windows using TWAIN did not
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<BR>
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have the same problems as using SANE but at least I've got a working
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<BR>
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system now.
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<BR>
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<P>Cheers,
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<BR>
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Rod
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<BR>
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<P><PRE>
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--
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Rod Pike
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rodneyp @ utanet.at
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<P>--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20Problem%20with%20scan%20quality%20using%20UMAX%20Astra%201220S&In-Reply-To=<20010129213453.A769@utanet.at>">majordomo@mostang.com</A>
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</PRE>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Mon Jan 29 2001 - 12:35:29 PST</EM>
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