CNC Operator

CNC Operator - 2020

Competency-based

ONET: 51-4011.00

2

Years

26

Skills

486h

Related instructions

Classroom instruction topics

Solid Works I (DFT-42/ENE-42)
Blueprint Reading (ENE-51/DFT-51)
General Machine Shop & Theory of Machining (MAN-36)
Occupational Safety & Health Administration (OSHA) Standards for General Industry (MAN-55/ELE-55)
CNC Machine Set-up and Operations (MAN-56)
CNC Program Writing (MAN-57)
Apprenticeship Work Experience (APP-450)

On-the-job training

Occupational Skills
- Remove and replace dull cutting tools.
- Measure dimensions of finished workpieces to ensure conformance to specifications, using precision measuring instruments, templates, and fixtures.
- Mount, install, align, and secure tools, attachments, fixtures, and workpieces on machines, using hand tools and precision measuring instruments.
- Stop machines to remove finished workpieces or to change tooling, setup, or workpiece placement, according to required machining sequences.
- Transfer commands from servers to computer numerical control (CNC) modules, using computer network links.
- Check to ensure that workpieces are properly lubricated and cooled during machine operation.
- Set up and operate computer-controlled machines or robots to perform one or more machine functions on metal or plastic workpieces.
- Insert control instructions into machine control units to start operation.
- Review program specifications or blueprints to determine and set machine operations and sequencing, finished workpiece dimensions, or numerical control sequences.
- Listen to machines during operation to detect sounds such as those made by dull cutting tools or excessive vibration and adjust machines to compensate for problems.
- Monitor machine operation and control panel displays and compare readings to specifications to detect malfunctions.
- Enter commands or load control media, such as tapes, cards, or disks, into machine controllers to retrieve programmed instructions.
- 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.
- Adjust machine feed and speed, change cutting tools, or adjust machine controls when automatic programming is faulty or if machines malfunction.
- Lift workpieces to machines manually or with hoists or cranes.
- Stack or load finished items or place items on conveyor systems.
- Control coolant systems.
- Maintain machines and remove and replace broken or worn machine tools, using hand tools.
- Confer with supervisors or programmers to resolve machine malfunctions or production errors or to obtain approval to continue production.
- Implement changes to machine programs and enter new specifications, using computers.
- Set up future jobs while machines are operating.
- Clean machines, tooling, or parts, using solvents or solutions and rags.
- Input initial part dimensions into machine control panels.
- Write simple programs for computer-controlled machine tools.
- Lay out and mark areas of parts to be shot-peened and fill hoppers with shot.