The development of automatic machinery involves a range of technicians with different skill sets, including:

1. Mechanical engineers: They design and develop the mechanical components of the machinery, including gears, motors, and other moving parts.
2. Electrical engineers: They design the electrical systems, including wiring, circuit boards, and sensors, that control the machinery’s movements and functions.
3. Software engineers: They develop the software that controls the machinery’s operations, including the user interface and any algorithms used for decision-making.
4. Control systems engineers: They design and implement the control systems that regulate the machinery’s performance and ensure it operates safely and efficiently.
5. Robotics engineers: They design and develop robotic systems that can be integrated into the machinery to automate processes.
6. Quality control technicians: They test and evaluate the machinery to ensure it meets design specifications and performs reliably.
7. Manufacturing technicians: They build and assemble the machinery using a variety of tools and techniques, including welding, machining, and 3D printing.

Overall, the development of automatic machinery requires a team of skilled technicians with expertise in mechanical engineering, electrical engineering, software development, control systems engineering, robotics, quality control, and manufacturing.