National

Operate computer-controlled machines or robots to perform one or more machine functions on metal or plastic work pieces.

Sample of reported job titles: Computer Numerical Control Operator (CNC Operator), Computer Numerical Control Machinist (CNC Machinist), Machine Operator, Computer Numerical Control Lathe Operator (CNC Lathe Operator), Computer Numerical Control Machine Operator (CNC Machine Operator), Computer Numerical Control Mill Operator (CNC Mill Operator), Production Worker, Brake Press Operator, Computer Numerical Control Set Up Technician (CNC Set Up Technician), Computer Numerical Control Set-Up Operator (CNC Set-Up Operator)

Tasks

• Measure dimensions of finished workpieces to ensure conformance to specifications, using precision measuring instruments, templates, and fixtures.
• Remove and replace dull cutting tools.
• Mount, install, align, and secure tools, attachments, fixtures, and workpieces on machines, using hand tools and precision measuring instruments.
• Listen to machines during operation in order to detect sounds such as those made by dull cutting tools or excessive vibration and adjust machines to compensate for problems.
• Adjust machine feed and speed, change cutting tools, or adjust machine controls when automatic programming is faulty or if machines malfunction.
• Stop machines to remove finished workpieces, or to change tooling, setup, or workpiece placement, according to required machining sequences.
• Lift workpieces to machines manually, or with hoists or cranes.
• Modify cutting programs to account for problems encountered during operation and save modified programs.
• Calculate machine speed and feed ratios, and the size and position of cuts.
• Insert control instructions into machine control units to start operation.

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Tools & Technology

Tools used in this occupation:

Technology used in this occupation: