Quote:
Originally Posted by pfreivald
Any sufficient amount of energy stored in an elongation should do it. Whatever your raising device is can be linked (mechanically or electrically) to release a restraint keeping your stored energy device (gas spring, spring, surgical tubing, whatever) extended. Once released by the claw's contact with the bar, the device will contract automatically and without further input from the rest of the robot.
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The problem I'm having is how to have enough force in that stored energy to lift the 120+ lb robot up and have it a) be able to be held back by something simple, b) have it not be gigantic (weight-wise or volume-wise)and c) have it be relatively safe for students to assemble and test.