The operator must load raw materials, select the correct tools, and ensure the machine runs smoothly during production. They are required to monitor machining operations, check dimensions using measuring instruments like vernier calipers and micrometers, and make necessary adjustments to maintain accuracy and quality. Regular inspection of finished parts, keeping machines clean, performing minor maintenance, and following safety procedures are key duties. The CNC Operator also reports any technical issues to the supervisor and helps improve production efficiency and product quality.