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</o:shapelayout></xml><![endif]--></head><body lang=FR-CA link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><span lang=EN-CA>Very good idea.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>If I understand correctly their would be 2 sensors close to each other<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>but set a little apart from each ones. (But on one of the two paper sides only)<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>If so there would be some kind of detected ‘notch’ or ‘peak’<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>to tell the paper is correctly placed right ?<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>But when this peak or notch disappears how can I know which direction to move the paper<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>and correct its position ?<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>I would need the same tandem on the other paper edge.. ?<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA>******************************************************************************<o:p></o:p></span></p><p class=MsoPlainText>De : Synth-diy <mailto:synth-diy-bounces@synth-diy.org> De la part de Gerry Murray via Synth-diy<o:p></o:p></p><p class=MsoPlainText>Envoyé : 9 avril 2023 11:20<o:p></o:p></p><p class=MsoPlainText>À : mailto:synth-diy@synth-diy.org<o:p></o:p></p><p class=MsoPlainText><span lang=EN-CA>Objet : Re: [sdiy] My Player piano roll project... refining my design<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Hi JP<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA>I would recommend two of these sensors operated in linear mode, with a small difference in their physical position and invert the signal from one of them.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>From these two signals you would get a 'detent' differential signal that would tell you the lateral error and allow you to adjust the horizontal position of the paper more accurately.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Best wishes<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Gerry<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA>On 09/04/2023 16:09, Jean-Pierre Desrochers wrote:<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Hi all again,<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>I’m still trying to refine my design and working on<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>the paper centering process circuit.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>So far I’m using the tracker bar edge’s holes to detect<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>left/right paper movements while playing the rolls.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Those who are at the paper’s edge sides. <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>The system works pretty well <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>but still some rolls lacks of centering correction.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>SO I want to do some tests using Photointerrupters - Slot Type – with open collector Outputs.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Like those types:<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>I’m trying to select the best accurate one to detect paper edges<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>not the overall paper cutting the IR beam..<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Any idea of the best specifications to pick one ?<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA> <o:p></o:p></span></p><p class=MsoPlainText>De : Synth-diy mailto:synth-diy-bounces@synth-diy.org De la part de Jean-Pierre Desrochers<o:p></o:p></p><p class=MsoPlainText>Envoyé : 23 février 2023 17:31<o:p></o:p></p><p class=MsoPlainText>À : mailto:Synth-diy@synth-diy.org<o:p></o:p></p><p class=MsoPlainText><span lang=EN-CA>Objet : [sdiy] My Player piano roll project... a small video demo for you..<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Importance : Faible<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>I’m not done yet with this project but this is promissing..<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>https://www.youtube.com/watch?v=K7xXYqCB0AY<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>I let the piano roll play its song while filming.. around 4:00 duration.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Enjoy !<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA>_______________________________________________<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Synth-diy mailing list<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>mailto:Synth-diy@synth-diy.org<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>http://synth-diy.org/mailman/listinfo/synth-diy<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Selling or trading? Use mailto:marketplace@synth-diy.org<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA><o:p> </o:p></span></p></div></body></html>