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<!-- received="Thu Oct 8 09:26:43 1998 PDT" -->
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<!-- sent="Thu, 8 Oct 1998 18:25:06 +0200 (METDST)" -->
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<!-- name="Andreas Czechanowski" -->
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<!-- email="m075@ins.uni-stuttgart.de" -->
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<!-- subject="Re: Strage behavior (MFS-1200SP & sane 0.73)" -->
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<!-- inreplyto="13852.52461.823570.972919@tinguely" -->
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<title>sane-devel: Re: Strage behavior (MFS-1200SP & sane 0.73)</title>
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<h1>Re: Strage behavior (MFS-1200SP & sane 0.73)</h1>
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<b>Andreas Czechanowski</b> (<a href="mailto:m075@ins.uni-stuttgart.de"><i>m075@ins.uni-stuttgart.de</i></a>)<br>
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<i>Thu, 8 Oct 1998 18:25:06 +0200 (METDST)</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#116">[ date ]</a><a href="index.html#116">[ thread ]</a><a href="subject.html#116">[ subject ]</a><a href="author.html#116">[ author ]</a>
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<li> <b>Next message:</b> <a href="0117.html">bruno schwander: "Re: OS/2 ant sane 0.74"</a>
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<li> <b>Previous message:</b> <a href="0115.html">Dr. Andreas Bolsch: "Re: Strage behavior (MFS-1200SP & sane 0.73)"</a>
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</ul>
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Hi Anthony !<br>
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<p>
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This is something else what distinguishes a good hardware implementation<br>
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of a scanner from a lousy one:<br>
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<p>
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A good implementation should not allow moving beyond the end by either<br>
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a hardware switch sensing the end-position and stopping the motor this<br>
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way, or by a current limit or friction clutch that does not allow<br>
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desctructive forces to take effect on the mechanical construction.<br>
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Apart from this, there must be a software limitation in the firmware.<br>
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<p>
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You may try to insist on a case of warranty (I don't think that<br>
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this case would have been absolutely avoidable with their Windows<br>
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software), or try to look yourself if you can find a sensor<br>
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(mechanical or optical switch) that may have been in a different<br>
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position before. (try to reconstruct the damage case with the<br>
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scanner switched off and moving the scanning head manually).<br>
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<p>
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Good Luck !<br>
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<p>
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Andreas.<br>
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<p>
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On Thu, 8 Oct 1998, Anthony Mallet wrote:<br>
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<p>
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<i>> Hi,</i><br>
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<i>> I'm experiencing a (very) strange behavior with my Mustek 1200SP (rev 1.06) </i><br>
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<i>> and sane 0.73 (under linux 2.1.117). I'm not sure if it is a software or a</i><br>
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<i>> hardware bug.</i><br>
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<i>> </i><br>
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<i>> First, everything was ok (cool, isn't it ;)</i><br>
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<i>> </i><br>
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<i>> Two days ago, I began a scan, and the head went too far away (though it</i><br>
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<i>> NEVER EVER did that before, and I did NOT CHANGE ANYTHING to my</i><br>
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<i>> box...). The mustek began to make frightening noise and I swtiched it off</i><br>
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<i>> immediately.</i><br>
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<i>> </i><br>
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<i>> Since that day, the scanning-head does NOT RETURN to the HOME POSITION</i><br>
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<i>> after a scan (but everything else is ok) and I must switch the mustek off</i><br>
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<i>> and on.</i><br>
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<i>> </i><br>
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<i>> So, it looks like a hardware bug since I did not change any software, but</i><br>
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<i>> I'm not sure there is a 'specialized' hardware in the scanner that only</i><br>
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<i>> controls the 'home return' of the head. I sent a mail to mustek-support</i><br>
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<i>> (europe) but they do not seem to answer it, so I'm a bit lost...</i><br>
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<i>> </i><br>
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<i>> If anyone has an idea...</i><br>
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<i>> Anthony</i><br>
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<p>
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<p>
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<pre>
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--
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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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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0117.html">bruno schwander: "Re: OS/2 ant sane 0.74"</a>
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<li> <b>Previous message:</b> <a href="0115.html">Dr. Andreas Bolsch: "Re: Strage behavior (MFS-1200SP & sane 0.73)"</a>
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<!-- nextthread="start" -->
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</ul>
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