I'm building a pick and place robot arm and planning on preprogram the arm to move the objects since all the things are put in a pre-determined place. That's why I'm thinking about using some stepper motors since the steppers and can be controlled by an arduino. (I have the Mega 2560). But I don't know what kind of stepper I'll need and what kind of motor control board I should get. Advice please!
For my current robot, I used tethered control with sparkfun servo control board and three 3-wire VEX motors. I have a 11.1 Li-Po battery and would like a stepper with torque greater than 6.5 in-lbs (VEX motors).
I found a stepper that is rated 3.35A but I can't find a control board that can handle that much current. Link: http://goo.gl/IckEQ
Thank you all for your time and effort!