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1、CNCMachinesFeatures,Programming,andControlIntroduction•MachineFeatures–Architecture–AutomationElements•Programming–GCodes–CustomPrograms•Control–TrajectoryPlanning21CNCArchitecture•BasicManualMachine–Mill,Lathe,orMachineCenter•Sensors–Positionand/orForce•Controller–ElectricorH
2、ydraulic•ControlLanguage3CNCAutomationElements•AutomaticToolChanger•PneumaticChuck•AutomaticFixtures•InspectionSystem–CMMorVisionSystem•MaterialHandlingSystem–DedicatedorGeneralRobot42MachiningCenter5ToolChanger63BasicControlOptions7AlternateControlOptions84CNCProgramming•Prog
3、ramsbasedonatechnologythatwasdevelopedinthe1950’s•Somehigherlevellanguagesexist–APT–Dynamite•TheselanguagesarebasedontheprimitiveG-codes9ProgramElementsI•G(generalfunctions)•M(miscellaneousfunctions)•X,Y,Z(x,yandzaxesvalues)•I,J,K(offsetvaluesfromx,yandz)•A,B,C(a,b,andcaxesval
4、ues)•F,S(feedrateandspindlespeedvalues)•T(toolselection)•L,P,Q(cannedcycleparameters)•R(radiusvalue)105ProgramElementsII•Gupto3digits•Mupto3digits•N(linenumber)upto4digits(e.g.N004)•Tupto3digits(e.g.T17)•Supto5digitsinrpm(e.g.S12000)•Fupto3digitsipm(e.g.F120)•X,Y,Z,A,B,C,I,J,K
5、upto7digits–Sign4digitsbeforeand2digitsafterpoint11GeneralFunctionsI•G00(rapidposition)•G01(linearinterpolation)•G02,03(Helicalinterpolationcwandccw)•G04(dwell)•G17,18,19(selectplanexy,xz,yz)•G20,21(selectinormm)•G28,30(returntoprimary/secondaryhome)•G33(screwcutting)126Genera
6、lFunctionsII•G40,41,42(radiuscompensationoptions)•G43,49(toollengthoptions)•G53(usedwithG0orG1touseabsolute)•G54to59(usepresetcoordinatesystem)•G80to89(usecannedcycle)•G90,91(useabsolute/incrementalmode)•G98,99(retractionlocationforG81-89)13CannedCycles•G81(drilling)•G82(drill
7、ingwithadwell)•G83(peckdrilling)•G84(righthandtapping)•G85(boringandfeedout)•G86(boring,dwell,andfeedout)•G87(backboring)•G88(boring,spindlestop,andmanualout)•G89(boring,dwell,andfeedout)147MiscellaneousFunctions•M00,01(programstopsoroptionalstop)•M02(programend)•M03,04,05(spi
8、ndleoncw,ccw,andstop)•M06(toolchange)•M07,08,09(mist/floodcoo
