THanks for the informative writeup. Now I know that some extrusion providers can hold much better tolerance than others.Manynyears back we asked for a quote for an extrusion tombe the support for a maglev train track. The extrusion would support the laminations and provide a means of supporting the track. Can you imagine a linear motor running fom Detroit to Miami? On the positive side, the train could cruise at hundreds of mph, and not really use that much power, since each section of track would only be powered for a few feet ahead of and behind the train cars. And the engine on the train would just be a communications console, with the moving portion of the engine being an aluminum plate. I designed the controls, which were triple redundant. No failures were allowed. The extrusion tolerances that we needed were just too tight.
Craig, thanks for following up with all these answers. The webinar gave a ton of information on designing better shapes, sometimes by just implementing a slight change, making the part easier to manufacture and less expensive. It's now available on demand at this link: http://tinyurl.com/mwtfxex
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