Arm Position Control

[Mr B]

We've used trigonometry in the past (essentially sin of the angle - with zero degrees being vertical) with some success, but that was mainly for steady state offset.

In this case a torsion spring would work, but so would latex tubing (which we've also used with success... way more often than I'd admit). The nice thing about bungee is that you can always add more if it isnt pulling enough.