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