The ability to build industrial robots requires high technology, which has caused only a few number of developers to build and develop. One of the challenging issues is the ability to create accurate, lightweight, and powerful actuators at the right speed. In this research, a robotic arm is designed and developed that, instead of using actuators in the main joints, they are placed on the robot basis using the four - bar mechanisms to move the upper - level members and the end effector. The advantage of this is that the arm is very light and its inertia has fallen sharply. Also, actuators only bear the torque caused by the payload and the weight of the structure, and the weight of the motor-gearboxes does not impose any torque on other actuators. This makes it possible to use powerful and accurate motor- gearboxes. Another feature of this robot is that without the need for any control system on the actuators, the gripper absolute angle, remains constant during the movement. In fact, this angle remains fixed using the mechanical mechanisms of the robot. It can only be changed by moving the third motor on the robot's base, and no changes in this angle occur with the movement of other motors and main arms. It is a great advantage that can be used in applications such as camera working, surface operations such as welding, milling, painting, 3D printing that is important to fix the angle of the tool in use. In this project, after designing and analyzing, the production of its laboratory sample was carried out using four degrees of freedom. The image processing system has also been implemented on the robot for future developments. A package of stepper motors (with closed loop control) and planetary gearboxes used as actuators. Keywords : Robot Arm, Parallel Robot, Manufacturing Parallelogram Robot Arm, Computer Vison, Endeffctor Position Monitoring