The capping machine belongs to canning machinery and plays an important role in the canning industry. The capping machine is mainly used for the screw cap sealing of glass bottles and PET bottles. Common capping machines are linear and spiral. These capping machines have many defects, and the capping force control accuracy is not high, which easily damages the cap.

In response to these shortcomings, this paper conducts research on new types of capping machines. The robotic automatic capping machine designed in this paper is mainly a capping manipulator. It realizes the multi-dimensional action of the screw cap through multiple motors, one motor drives the capping manipulator to close and grasp the cap, and the other motor rotates the cap to complete the capping action. The motor current is controlled by adopting an advanced control algorithm, and the gripping force of the robot and the capping torque of the manipulator are precisely adjusted to complete the optimal control of the capping action. Robot design is an important part of industrial automation research, and is also an important part of the design of this product. It is the motion actuator of this product. Structural design, motion path planning, and robotic torque control are the three main components of robotic research. On the basis of studying the development of manipulator and its structure, this paper uses fuzzy control algorithm to control the capping action of the capping manipulator and control its capping moment and gripping torque. The core of this design is the system control circuit and motor control circuit and algorithm design. Taking into account the various advantages of brushless DC motor brushless DC motor, the article uses brushless DC motor as the capping motor. The capping motor adopts three-phase full-bridge star connection two-two power-on driving mode, and uses an encoder to detect the motor position and speed.