Lifting mecanisms

[Jimmy Cao]

Originally Posted by IKE

3 sec x 200 watts is 600 Nm. A full weight robot is about 667 N so,
You could lift 1 robot 0.9 meters or 2 robots 0.45 (17.7")

Of course you need frictionless bearings and what not...

CIMs are somewhere between 200 and 300 Watts depending on battery voltage and ...

A fully loaded robot (120 + battery + bumpers) is closer to 150 lbs, which would put you closer to 750N

But that's a rather small difference.

What's important to remember is that although the PEAK power of a CIM is over 300W (I think), that requires it to be run at ~40% stall torque. If you run at at ~80% stall torque, you'd probably not even get 100W of electrical energy out of it (but you would get tons of thermal =D). So, although on paper the CIM has plenty of power to lift in 3 seconds, you need to effectively use that power.