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NUMERICAL CONTROL: CNC MACHINES PART.2 I. ADVANTAGES : 1) Unit costs and tooling costs are lower: mass production using transfer machines, multi spindle machines... Setup fixtures are greatly simplified because short runs can be cut from solid materials. Perishable tools can be run at optimal rates 2) Easier design changes: e.g.: to change the position of a hole, just edit the coordinates. This makes N/C ideal for prototypes. Some very difficult shapes can be done such as turbines. 3) Less lead time: There is no need to wait for pattern, castings and jigs to be made. If CAD drawings are supplied, we can get into programming quicklu by doing an IGES transferright into our CAM system. 4) Less space required: more operations faster with only one machine= less storage of unfinished parts. 5) CNC skills can be learn faster: Less time to learn how to run it (5 years for conventional/ 6 months for CNC) 6) Improved production planning: CAM(computer-aided-manufacturing) systems usually estimate the cycle time for a part 7) Reduce scrap: no operator fatigue; computerized operation.
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