tag:blogger.com,1999:blog-2807403883562053852.post8679103652863970390..comments2024-03-27T08:40:31.785-06:00Comments on Clayton Cramer.: Question For You Mechanical Engineers Out There...Clayton Cramerhttp://www.blogger.com/profile/03258083387204776812noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-2807403883562053852.post-15594860459202117172011-07-11T10:07:48.558-06:002011-07-11T10:07:48.558-06:00No question. The connectors are at http://www.foc...No question. The connectors are at http://www.focuser.com/cgi-bin/dman.cgi?page=category&plugin=dstore.cgi&category=6 .Clayton Cramerhttps://www.blogger.com/profile/03258083387204776812noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-46034474239205029022011-07-11T08:14:07.983-06:002011-07-11T08:14:07.983-06:00how you connect the elements together will have a ...how you connect the elements together will have a huge effect on the rigidity of the truss. if the connections have any give in them, the truss will not be as rigid as the software thinks it will be. the software is assuming the connections are as rigid as the base metal. welding is the only way to achieve that.Rorschachhttps://www.blogger.com/profile/11848860674369931761noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-13027738941001257712011-07-09T06:37:01.394-06:002011-07-09T06:37:01.394-06:00It is precisely the issues you mention that are th...It is precisely the issues you mention that are the reason for a Suerrier truss, using round tubes to form triangles. The tensioning wires were definitely an improvement over what I had, but they still leave room for improvement.Clayton Cramerhttps://www.blogger.com/profile/03258083387204776812noreply@blogger.comtag:blogger.com,1999:blog-2807403883562053852.post-44597812840872927022011-07-09T02:57:11.019-06:002011-07-09T02:57:11.019-06:00Square tube is probably a waste, Remember that th...Square tube is probably a waste, Remember that the rigidity of a rectangular section is much higher along its long dimension than the thin one. You could use twice as many L- or T-sections as square tubes, and also benefit from not bolting through empty space when it comes to attaching them. However, for real rigidity, you can't beat triangles, and for that I suggest that you not depend just on the rigidity of the struts, but form a larger scale truss by connecting the rods together with angled pieces.<br /><br />Taking a closer look, I can kind of see what you're doing with the tensioned wires, but I think that's not such a good idea for a structure subject to loads from so many different directions as it moves. Effectively, you're making it out of springs, so no wonder it flexes when you reorient it.Mauserhttps://www.blogger.com/profile/11732614352398473302noreply@blogger.com