ABSTRACT
This chapter discusses a robotic arm that is built using direct current (DC) motors and is controlled by switches. The arm is made from lightweight plastic. Most of the stress-bearing parts are also made of plastic. The DC motors used in the robotic arm are small, high rpm, low torque motors. The motor gearbox assemblies are used inside the construction of the robotic arm. The gripper has the rack and pinion gear mechanism for one finger. While the gearboxes increase the motor’s torque, the robotic arm is not capable of lifting or moving a great amount of weight. The robotic arm can be controlled by hand using a control panel. The DC motor is on the other side of the upper arm. Its output shaft’s gear is attached to the mediation gear on the other side. Torque is equal to the product of force and radius, or alternately, force is the quotient of torque when it is divided by radius.
