pic: 179 weldments so far

[Swampdude]

Originally Posted by Rex114

Very interesting chain tensioning set up you have for that wrist joint. Is it like that to allow the chain to slip if the grabber hits the overpass? I'd love to see video of that (Swamp)thing hurdling.

I'll try and get some video tomorrow. The chain tension springies are just a response to the uneven kinematics of the linkage points. Originally the arm was going to have pneumatics, but welding was a little out, and the globe motor saved us, but actually works better, and is lighter. Amazingly what you see here is only 100lbs. but a herding device is not mounted yet, which adds another 6lbs. those go on tomorrow
Still lots of tweaking and a cool ultrasonic panning unit to do.