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--></style></head><body lang=FR-CA link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoPlainText><span lang=EN-CA>This is a question for mechanics engineer..<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 using this type of stepper motor in a project:<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoPlainText><b><span lang=EN-CA style='font-size:12.0pt'>SanMotion SF2424-10B41<o:p></o:p></span></b></p><p class=MsoPlainText><span lang=EN-CA>* Bipolar<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>* 200 steps per revolution<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>* 24vdc @ 1A<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>* </span><b><span lang=EN-CA style='font-size:14.0pt'>Torque - Holding (oz-in / mNm) 113.30 / 800</span></b><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><img width=1334 height=1199 style='width:13.8958in;height:12.4895in' id="Image_x0020_1" src="cid:image001.jpg@01DC6053.93D84AD0"></span><span lang=EN-CA><o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Its shaft has a 16 teeth gear installed<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>pulling a small chain.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>The picture shows the type of gear and chain used<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>to run my system.<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><img width=402 height=332 style='width:4.1875in;height:3.4583in' id="Image_x0020_2" src="cid:image002.png@01DC6053.93D84AD0"></span><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><u><span lang=EN-CA style='font-size:12.0pt'>I'd like to raise up this stepper max usable torque<o:p></o:p></span></u></p><p class=MsoPlainText><span lang=EN-CA>by using a gear with larger number of teeth<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>and lowering the rotation speed accordingly<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>to keep the same final chain pace as the original one.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>For example: Using a 32 tooth gear and a rotation of half the original 16 teeth’s speed (16/32).<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>My question is<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Would this modification raise the final torque significantly ?<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA>Keeping the same 24vdc 1A power supply ?<o:p></o:p></span></p></div></body></html>