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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This module supports “64-fold” micro stepping. So the number of counts per revolution for the Target Position is 200*64 = 12800 steps per revolution.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Graeme.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> etherlab-users [mailto:etherlab-users-bounces@etherlab.org]
<b>On Behalf Of </b>Paul Mulligan<br>
<b>Sent:</b> Tuesday, 26 January 2016 3:37 a.m.<br>
<b>To:</b> etherlab-users@etherlab.org<br>
<b>Subject:</b> [etherlab-users] Controlling motors in position controller mode<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black">Hi,<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black">I am using the EL7031 to control a motor using the position controller mode but I am having issues.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black">My steps per revolution are at the default of 200 using the setting 8010:06.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black">My cyclic function executes every 10ms. Every time the function executes, the target position (7010:11) is incremented by 2. <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black">I would therefore expect to see the motor turning at one revolution per second but instead it is moving very slow. If I increment the
target position by 150 every cycle, it seems to be turning at about 1 rev/s. I'm struggling to make sense of why this is. <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black">By using the command line tool, no errors are reported, the motor is configured as expected and the full steps per revolution are 200.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black">Am I missing some other setting or something obvious? <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black">I appreciate any help. Thanks<o:p></o:p></span></p>
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