Operate computer-controlled tools, machines, or robots to machine or process parts, tools, or other work pieces made of metal, plastic, wood, stone, or other materials. May also set up and maintain equipment.Tasks:Measure dimensions of finished workpieces to ensure conformance to specifications, using precision measuring instruments, templates, and fixtures.Related occupationsSet up and operate computer-controlled machines or robots to perform one or more machine functions on metal or plastic workpieces.Related occupationsMount, install, align, and secure tools, attachments, fixtures, and workpieces on machines, using hand tools and precision measuring instruments.Related occupationsReview program specifications or blueprints to determine and set machine operations and sequencing, finished workpiece dimensions, or numerical control sequences.Related occupationsStop machines to remove finished workpieces or to change tooling, setup, or workpiece placement, according to required machining sequences.Related occupationsListen 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.Related occupationsImplement changes to machine programs, and enter new specifications, using computers.Related occupationsCalculate machine speed and feed ratios and the size and position of cuts.Related occupationsTransfer commands from servers to computer numerical control (CNC) modules, using computer network links.Related occupationsRemove and replace dull cutting tools.Related occupationsCheck to ensure that workpieces are properly lubricated and cooled during machine operation.Related occupationsAdjust machine feed and speed, change cutting tools, or adjust machine controls when automatic programming is faulty or if machines malfunction.Related occupationsMonitor machine operation and control panel displays, and compare readings to specifications to detect malfunctions.Related occupationsMaintain machines and remove and replace broken or worn machine tools, using hand tools.Related occupationsInsert control instructions into machine control units to start operation.