[Orion.DeYoe]

Originally Posted by K-Dawg157

You have a valid point, programmer.

It would all depend on the material being used, and the orientation it was being used in. Also, how high the support from the back is up the side rails would be important.

I did some calculations with an engineer, and we figured it out that the maximum load the robot (assuming 6 tote or 5 tote bucket and noodle capabilities) would be holding, cantilevered at 6' in the air, would be ~400 foot pounds...

Make sure your material is all good and the supports will hold it and you should be set.

Um... You need to check those numbers...
The load is not cantilevered the height of the elevator. The number you should be using for your moment arm is the horizontal distance from the center of the carriage to the COG of the load (something like 12-16 inches). Multiply that distance by the weight of the load (60 lbs we'll say) and you get something like 720 - 960 in*lbs (60 - 80 ft*lbs).
It appears everything is made from 1x1 8020 extrusion. It's pretty beefy stuff and the elevator appears well-supported. I wouldn't anticipate anything horrible happening to it.
I probably would make the carriage taller though (as someone else mentioned).