Grazer – Updated Designs — Lukas

Screen shot of a design in Fusion 360

Screen shot of a design in Fusion 360

Surprise! More designs for joints…

The last post I made on this blog served primarily as a design exercise to lean how to use the CNC machine. I guess this is the real deal then, albeit on a computer screen. I think I’ve almost made up my mind to use 1×1 in box aluminum tube. I got obsessed with the idea of having an all aluminum, shining, silver, streamlined, slippery Grazer walking along. For some reason, round aluminum tubing is ridiculously expensive whereas square tubing is significantly cheaper, hundreds of dollars less for the amount that I would need. Using square material is also always easier to work with than round stuff, and I think it will be a good differentiating factor between the Grazer and Strandbeest.

Screen Shot 2015-04-13 at 12.05.25 AM Screen Shot 2015-04-13 at 12.05.37 AM

With a wall thickness of the tube is 1/16 in, that leaves a 3/8 x 3/8 inch cavity for the joint components to slot into and be further braced by the tubing itself. With material on the way, hopefully milling for the components above will begin soon. In the meantime, I really need to start picking up my time spent designing, especially focusing on chasis design, as I can now extrapolate measurements knowing what material i’ll be using. Since Fusion 360 supports animation, I may also work on a simulation of an entire leg to work out whether or not my joints will facilitate the proper angles required in the legs movement.

I also made some simple angle pieces that will slot into the fixed triangle parts of the leg, all at angles specified to the leg triangles:

Screen Shot 2015-04-13 at 12.21.29 AM

Following in the same vain as my streamlined aluminum aspirations, I’m reminded of Raymond Loewy, one of the best industrial designers of all time. He’s really one of my favorites, and a true inspiration for design, he designed things like the coke bottle, shell and exon logos, streamlined trains, pencil sharpeners, and the original greyhound busses. Here’s a short summary of his work:

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