Quote:
Originally Posted by Al Skierkiewicz
Please remember that in raising an arm, there is a change in force/load. The greatest demand (load) on the motor will occur when the arm is passing through the horizontal plane. I am sure that Dr. Joe can explain this better than I can.
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This also depends on the configuration of any counterweights or springs or other devices that help support the arm (besides the motor).
For example, the gas spring on the 1726 robot arm is set up right now in a way that it takes more motor torque to lower the arm from the full up position, than it does to move it at any other position.