Supporting 40lbs Arm with Motor?

[nrogals]

Hello Everyone,

Our team is looking to put a long rage shooter and acquisition unit on a single arm. Both units will weigh about 20lbs. The torque on the motor will be near 70-80 foot pounds.

Can a Mini CIM and a multiple stage gear box hold the arm up via friction in the gear box. If not, is there a method for running the motor with a certain voltage pattern such that it holds the arm and will not pull a sufficient amount of power away from the drive train.(Electric Break)

If not, at last resort, does anyone have any suggestions to apply a mechanical break to the motor shaft.

Thanks!!!!!