suchasdrilling,countersinking,couterbofing,reaming,boringandtapping.Holepunchingmachines,spotweldingmachines,andassemblymachinesalsousepointtopointNCsystems.Contouringsystem,alsoknownasthecontinuouspathsystem,positioningandcuttingoperationsarebothalongcontrolledpathsbutatdifferentvelocities.Becausethetoolcutsasittravelsalongaprescribedpath,accuratecontrolandsynchronizationofvelocitiesandmovementsareimportant.Thecontouringsystemisusedonlathes,millingmachines,grinders,incrementally,byoneofseveralbasicmethods.ThereareanumberofinterpolationschemesthathavebeendevelopedtodealwiththevariousproblemsthatareencounteredingeneratingasmoothcontinuouspathwithacontouringtypeNCsystem.Theyincludelinearinterpolation,circularinterpolation,helicalinterpolation,parabolicinterpolationandcubicinterpolation.Inall
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