CNC Machinist

CNC Machinist sets up and operates computer numerical control (CNC) machines, machining centers, or manual machines to fabricate metallic parts. CNC Machinist Studies blueprints, sketches, drawings, manuals, specifications, or sample parts to determine dimensions and tolerances of finished work piece, sequence of operations, and setup requirements. Measures, marks, and scribes’ dimensions and reference points on material or work pieces as guides for subsequent machining. Selects, aligns, and secures holding fixtures, cutting tools, attachments, accessories, and materials on machines such as mills, lathes, and jig borers. Calculates and sets controls to regulate machining factors such as speed, feed, coolant flow, and depth and angle of cut, or enters commands to retrieve, input, or edit computerized machine control media. Starts and observes machine operation to detect malfunctions or out-of-tolerance machining, and adjusts machine controls or control media as required. Verifies conformance of finished work piece to specifications. Sets up and operates machine on trial run (prove-out), when afforded, to verify accuracy of machine settings or programmed control data. Ability to read and interpret documents such as safety rules, operating and maintenance instructions, work orders, specifications, aerospace blueprints and drawings, and procedure manuals.