# Computer Numerically Controlled Tool Programmers > Develop programs to control machining or processing of materials by automatic machine tools, equipment, or systems. May also set up, operate, or maintain equipment. - Code: 51-9162.00 (O*NET-SOC; SOC 2018 51-9162) - Family: [Production](https://foundation.org.ai/occupations#family-51), one of its 114 occupations - Tasks: 15 tasks (12 core and 3 supplemental) - Page: https://foundation.org.ai/occupations/51-9162.00 - JSON: https://foundation.org.ai/data/tasks/51-9162.00.json ## What the work is made of 1. Write programs in the language of a machine's controller and store programs on media, such as punch tapes, magnetic tapes, or disks. Core task · Task 11966 · Rated by 71 people who do the job, July 2016 2. Determine the sequence of machine operations, and select the proper cutting tools needed to machine workpieces into the desired shapes. Core task · Task 11959 · Rated by 72 people who do the job, July 2016 3. Revise programs or tapes to eliminate errors, and retest programs to check that problems have been solved. Core task · Task 11960 · Rated by 72 people who do the job, July 2016 4. Analyze job orders, drawings, blueprints, specifications, printed circuit board pattern films, and design data to calculate dimensions, tool selection, machine speeds, and feed rates. Core task · Task 11961 · Rated by 72 people who do the job, July 2016 5. Write instruction sheets and cutter lists for a machine's controller to guide setup and encode numerical control tapes. Core task · Task 11970 · Rated by 71 people who do the job, July 2016 6. Observe machines on trial runs or conduct computer simulations to ensure that programs and machinery will function properly and produce items that meet specifications. Core task · Task 11963 · Rated by 71 people who do the job, July 2016 7. Enter computer commands to store or retrieve parts patterns, graphic displays, or programs that transfer data to other media. Core task · Task 11968 · Rated by 70 people who do the job, July 2016 8. Modify existing programs to enhance efficiency. Core task · Task 11967 · Rated by 71 people who do the job, July 2016 9. Determine reference points, machine cutting paths, or hole locations, and compute angular and linear dimensions, radii, and curvatures. Core task · Task 11962 · Rated by 70 people who do the job, July 2016 10. Sort shop orders into groups to maximize materials utilization and minimize machine setup time. Core task · Task 11971 · Rated by 71 people who do the job, July 2016 11. Compare encoded tapes or computer printouts with original part specifications and blueprints to verify accuracy of instructions. Core task · Task 11964 · Rated by 71 people who do the job, July 2016 12. Perform preventative maintenance or minor repairs on machines. Core task · Task 20922 · Rated by 70 people who do the job, July 2016 13. Prepare geometric layouts from graphic displays, using computer-assisted drafting software or drafting instruments and graph paper. Supplemental task · Task 11969 · Rated by 71 people who do the job, July 2016 14. Draw machine tool paths on pattern film according to guidelines for tool speed and efficiency, using colored markers. Supplemental task · Task 11972 · Rated by 71 people who do the job, July 2016 15. Enter coordinates of hole locations into program memories by depressing pedals or buttons of programmers. 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