Programmers of Computer and Numerically Controlled Machine Tools

<ul><li>Determine the sequence of machine operations, and select the proper cutting tools needed to machine workpieces into the desired shapes.</li><li>Write programs in the language of a machine's controller and store programs on media such as punch tapes, magnetic tapes, or disks.</li><li>Revise programs or tapes to eliminate errors, and retest programs to check that problems have been solved.</li><li>Analyze job orders, drawings, blueprints, specifications, printed circuit board pattern films, and design data to calculate dimensions, tool selection, machine speeds, and feed rates.</li><li>Write instruction sheets and cutter lists for a machine's controller to guide setup and encode numerical control tapes.</li><li>Observe machines on trial runs or conduct computer simulations to ensure that programs and machinery will function properly and produce items that meet specifications.</li><li>Modify existing programs to enhance efficiency.</li><li>Enter computer commands to store or retrieve parts patterns, graphic displays, or programs that transfer data to other media.</li><li>Determine reference points, machine cutting paths, or hole locations, and compute angular and linear dimensions, radii, and curvatures.</li><li>Sort shop orders into groups to maximize materials utilization and minimize machine setup time.</li><li>Compare encoded tapes or computer printouts with original part specifications and blueprints to verify accuracy of instructions.</li><li>Perform preventative maintenance or minor repairs on machines.</li></ul>