I have this robot arm and I'm wondering which stepper motor has enough torque to pull the arm up and to let it back down (2directions). We also have to move it forward and backwards (2directions). I'm using an Arduino Mega but I'm not sure if we need an extra power source for the 4 motors and wha…

Motor for robot arm

vinceherman April 19, 2018, 1:30pm 2

Do you have a link to the arm? Or a name?

If someone put that much effort into designing it, they probably did so with a specific motor in mind. Hobby servos are popular for DIY robot arms.

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