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<title>RoboSavvy Forum</title>
<subtitle>Robosavvy Forum: The largest online community of Humanoid Robot Builders</subtitle>
<link href="http://forum.robosavvy.com/index.php" />
<updated>2011-08-18T00:25:43+01:00</updated>

<author><name><![CDATA[RoboSavvy Forum]]></name></author>
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<entry>
<author><name><![CDATA[excalibur]]></name></author>
<updated>2011-08-18T00:25:43+01:00</updated>
<published>2011-08-18T00:25:43+01:00</published>
<id>http://forum.robosavvy.com/viewtopic.php?t=7402&amp;p=32070#p32070</id>
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<title type="html"><![CDATA[Humanoid Type A - turn in place]]></title>

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/.<br /><br />Hi rkartzinel<br /><br />According to my own experience with Bioloid Type A, ya; you may have some problems, specially if you have changed the structure of the robot. For example if you have added a mini pc, a pan-tilt head, extra batteries and etc or anything that change the base structure of the robot. cuz AX-12 servos are very sensitive to change in load, and by passing extra load`s red line, your moves wouldn`t be accurate, and even not same in later repeats.<br /><br />In our robot any change in COM ( even 2,3 mm ) had an observable effect in movements ( those that the robot had to hold up legs one by one, like walking, turnings left &amp; right,... )<br /><br />I dont know how much experienced you are, but in advanced level, the best way of designing a motion is to design it in a simulating environment, ( with real and accurate data of course! ) and using the result in physical structure. But if you are new, you its better to design and change some motion by changing and testing, to have a good vision of work you wanna do; its necessary!<p>Statistics: Posted by <a href="http://forum.robosavvy.com/memberlist.php?mode=viewprofile&amp;u=2660">excalibur</a> — Thu Aug 18, 2011 12:25 am</p><hr />
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</entry>
<entry>
<author><name><![CDATA[rkartzinel]]></name></author>
<updated>2011-08-17T16:07:44+01:00</updated>
<published>2011-08-17T16:07:44+01:00</published>
<id>http://forum.robosavvy.com/viewtopic.php?t=7402&amp;p=32066#p32066</id>
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<title type="html"><![CDATA[Humanoid Type A - turn in place]]></title>

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I have been unsuccessfull in getting the robot to turn in place like a piroette. The motion 3 or 4 in the example walking file makes shuffling turns in a circle. No matter how I rotate at the hip and try to shift weight from 1 leg to the other using the standrd Roboplus program, the feet move in place but the body is too heavy to turn. Do I need to replace the AX-12A at the hips with a stronger servor? Thanks for any help.<p>Statistics: Posted by <a href="http://forum.robosavvy.com/memberlist.php?mode=viewprofile&amp;u=2864">rkartzinel</a> — Wed Aug 17, 2011 4:07 pm</p><hr />
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