{"id":357489,"date":"2024-03-17T17:50:22","date_gmt":"2024-03-17T17:50:22","guid":{"rendered":"\/forum\/forums\/reply\/357489\/"},"modified":"2024-03-17T23:18:31","modified_gmt":"2024-03-17T23:18:31","slug":"357489","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/357489\/","title":{"rendered":"Reply To: Optimization of a throwing axe!!!"},"content":{"rendered":"<p>&lt;p&gt;The problem with a sphere in what should have been a larger radius sphere is that the ball is not stable and a smaller radius ball rolls around in the larger radius pocket causing lots of computation to keep track of those small motions.&nbsp; If the two spheres were of equal radius, that may also be a problem.&lt;\/p&gt;&lt;p&gt;Try creating an arm with a conical cavity to take the ball. Then there is a well defined circle of contact. If you have a Rough contact, the ball will be stable in the cone during the launch.&nbsp;&nbsp;&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/17-03-2024-1710697102-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;Use a regular Spring to Ground and add the Preload to that.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/17-03-2024-1710697772-mceclip1.png\" \/>&lt;\/p&gt;&lt;p&gt;On the revolute joint, you can define a Stop so you don&rsquo;t need the rod for the arm to crash into.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/17-03-2024-1710697815-mceclip2.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-357489","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"The problem with a sphere in what should have been a larger radius sphere is that the ball is not stable and a smaller radius ball rolls around in the larger radius pocket causing lots of computation to keep track of those small motions. 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