NCProgram,Unit10,数控编程,ThePlantofCNCMachines(数控机床车间),NCProgram,Text,AgroupofcommandsgiventotheCNCforoperatingthemachineiscalledtheprogramByspecifyingthecommands,toolismovedalongastraightlineoranarc,orthespindlemotoristurnedonandoff.Intheprogram,specifythecommandsinthesequenceofactualtoolmovements(Fig.10-1a)AgroupofcommandsateachstepofthesequenceiscalledtheblockTheprogramconsistsofagroupofblocksforaseriesofmachiningThenumberfordiscriminatingeachblockiscalledthesequencenumber,andthenumberfordis