I started working on arduino uno board a couple of weeks back. What I intend to do is to build a robotic arm to perform simple pick and place task.
I am having a tough time selecting an actuator for this. Since my final purpose is to do dynamic analysis, servo motors are out of question. What motors will be suitable for this task.
Most decent servo motor controllers have position mode, velocity mode and torque mode
and many combinations of the above. Such industrial servo motors and controllers are
very expensive though.
Perhaps you are confusing a hobby-servo from a true servo motor?
For torque control you need a current sensor as well as a motor driver - the Arduino can
form a servo feedback loop from that to hold the motor current at the demanded value.
Add an encoder and you can do position and/or velocity control loops too. So a roll-your-own
servo loop might be the way to go here.
For those kinds of torques you'll need gear reduction.