How do you make a robotic arm?
When you consider how the human arm actually works, the robot arm is almost simple by comparison. Both systems use a frame, which may or may not be movable. One is chemically motivated, the other is either hydraulic or electrical or an electrohydraulic hybrid. Both use “push/pull” leverage against a frame to move the arm and open or close the manipulator/hand at the end. Weld the manipulator (stator) to the bottom of the end of the aluminum “forearm” beam that does not have a ram attachment link. Weld a robotic hinge joint to the end of the forearm beam and the stator. Weld the trapezoidal (mobile) block of aluminum to the robotic hinge joint, so that the ram attachment link is on top. Close the hinge, so that the stator and mobile parts of the manipulator are closed. Weld the upper and lower “arms” to a hinge, to form the “elbow.” Weld a hinge to the upper end of the upper arm and to the external “shoulder” support. Attach the piston of a hydraulic ram to the attachment link on the mo
