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Originally Posted by pi_guy578
>>How do I determine the required torque rating of the motor?
Attach a foot long pole attach it to the end of the motor shaft. attach the other end of the pole to a pull scale. Now run the motor until it stalls, record the weight. That's how much torque the motor has, measured in foot pounds
>>Any external control electronics necessary?
If its not necassary. You can just use a switch battery and 2 limit shitches to turn off the power when it reaches its specified position.
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Ok, but don't I need logic functions from external gates and flip flops to accomplish the toggling of the power and motor rotation?
For example, using a two-position switch:
with the operator switch in position one, the motor pwr is latched "on" and the arm rotates to the horizontal position...when the (horizontal) limit switch toggles the pwr off.
with the operator switch manually changed to position two, the motor pwr is toggled to "on" again, and the motor polarity is reversed, returning the arm to the vertical position...until the (vertical) limit switch toggles the pwr off again.
Erik