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Re: Octocanum Drive/ Mecanum Suspension Designs?
Here's a closeup of how 1540's Octocanum drive works. It pivots on the traction wheel and uses 1" pancake cylinders to switch back and forth and to provide suspension. There's a custom single speed transmission built into the 2x1 frame but you need not do that. There is no chain tensioning, we just CADed it to be the right distance and it's been fine.
We started out with a variable air pressure system for the cylinder so that we could change how stiff the suspension was depending on how many toes we were carrying. We ended up dropping that feature because we needed the weight elsewhere. In the end, while we found Mecanum performance was better (more consistent strafing) with the suspension, our software with a heading sensor could do what we needed for this game. We actually don't strafe as often as we thought we would.
For St. Louis we ended up dropping the cylinders to get the weight for a can-grabber. We still have the traction wheels but they are just used to go over the scoring platforms and are just fixed a quarter inch above the ground.
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2016 PNW Championship Chairman's; 2016 Winner Oregon City District, 2015 PNW Championship Chairman's; 2015 PNW District Engineering Inspiration; 2015 PNW District Finalist; 2014 PNW Championship Chairman's; 2014 Championship Innovation in Controls; 2013 Chairman's (Oregon); 2013 Finalist (OKC); 2012 Winner (OKC); 2012 Chairman's (OKC); 2012 Woody Flowers (Oregon); 2011 Volunteer of the Year (Oregon); 2011 Finalist & Captain (San Diego); 2011 Innovation in Control (San Diego); 2010 & 2007 Chairman's (Oregon); 2010 Regional Champions (Colorado); 2010 Innovation in Control (Colorado); 2009 & 2008 Engineering Inspiration (Oregon); 2008 Regional Champions (Oregon); 2007 Regional Finalist (Oregon); 2005 Rookie Inspiration (PNW)
Last edited by Dale : 15-04-2015 at 18:05.
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