《PrecisionMeasurementTechnology》主講人：趙慧、楊國星TianjinLightIndustryVocationalTechnicalCollegeI

IIIIIIVVVIFundamentalsofCoordinateMeasurementApplicationDimensionalErrorDetectionShapeErrorDetectionDirectionalErrorDetectionPositionalErrorDetectionRunoutErrorDetectionVIICurveandSurfaceDetectionVIIIExtendedContentTaskIII:OperationofCALYPSOSoftwareProjectI:FundamentalsofCoordinateMeasurementTaskIV:CommonMeasurementModesoftheCoordinateMeasuringMachineTaskI:UnderstandingtheCoordinateMeasuringMachineTaskII:UsageRequirementsoftheCoordinateMeasuringMachineTaskII:OperationalRequirementsforCoordinateMeasuringMachines(CMMs)12MainParametersoftheCoordinateMeasuringMachineMainFactorsAffectingMeasurementResults3EnvironmentalRequirementsfortheUseofCoordinateMeasuringMachine4StartupProcedureoftheCoordinateMeasuringMachine5CommonFunctionsoftheControlPanel6ShutdownProcedureoftheCoordinateMeasuringMachine01MainParametersoftheCoordinateMeasuringMachineTaskII–OperationalRequirementsforCoordinateMeasuringMachines(CMMs)2.1MainParametersoftheCoordinateMeasuringMachine(1)TravelParametersThetravelparametersdescribethemaximumrangeofthemachine'stravel.Forexample,fortheZeissCONTURA7/10/6,themeasuringmachine'stravelrangesalongtheX,Y,andZaxesare700mm,1000mm,and600mm,respectively.TaskII–OperationalRequirementsforCoordinateMeasuringMachines(CMMs)2.1MainParametersoftheCoordinateMeasuringMachine（2）MainAccuracyParametersoftheEquipmentMaximumAllowableProbeError(PFTU)Forexample,ifthemanufacturerspecifiesaprobeerrorofPFTU=1.7μm，duringacceptance,theprobeerrormustbelessthan1.7μm(refertoISO-10360andthemanufacturer'sequipmentspecificationsforacceptancemethods).MaximumAllowableLengthMeasurementError(EL,MPE)TheformulaforthemaximumallowablelengthmeasurementerrorEL,MPEis:EL,MPE=A+L/KWhere??representsthemeasuredlengthinmm,and??and??areconstants(refertoISO-10360andthemanufacturer'sequipmentspecificationsforacceptancemethods).TaskII–OperationalRequirementsforCoordinateMeasuringMachines(CMMs)2.1MainParametersoftheCoordinateMeasuringMachineForexample,ifA=2μm，K=400mm/μm，andthelengthL=200mm，thenthemaximumallowableerrorEL,MPE=2μm+200/400μm=2.5μm，ThecalculationofEL,MPEisillustratedinFigure1-2-1.EL,MPE=A+L/K02PrimaryFactorsAffectingMeasurementResultsTaskII–OperationalRequirementsforCoordinateMeasuringMachines(CMMs)2.2MainFactorsAffectingMeasurementResultsThefactorsinfluencingthemeasurementresultsincludefiveaspects:operator(human),machine(CMM),material(workpiece),method(measurementstrategy),andenvironment.TaskII–OperationalRequirementsforCoordinateMeasuringMachines(CMMs)2.2MainFactorsAffectingMeasurementResultsCADDraftingManufacturingProcessesMeasuringMachinesandITStandardsQualityManagementStatisticsGeometryMetrologyExcellentCoordinateMeasuringMachineOperators03EnvironmentalRequirementsfortheUseofCoordinateMeasuringMachinesTaskII–OperationalRequirementsforCoordinateMeasuringMachines(CMMs)2.3EnvironmentalRequirementsfortheUseofCoordinateMeasuringMachinesAsahigh-precisioninspectiondevice,theperformanceofacoordinatemeasuringmachine(CMM)ishighlydependentontheenvironmentalconditions.Theseincludefactorssuchastemperature,humidity,airsupplyquality,guiderailprotectionandcleanliness,vibration,andpowersupply.（1）TemperatureRequirements:Thestandardtemperatureformetrologyis20℃.Thetypicaloperatingtemperaturerangeforcoordinatemeasuringmachinesis18°-22°C.（2）HumidityRequirements:

TherecommendedhumidityrangeforCMMsis40％-60％。ExcessivehumiditycanleadtocondensationontheCMM,causingpartstorust,andmayalsocausethemarblebasetoabsorbmoistureanddeform.Insufficienthumiditymaygeneratestaticelectricity,whichcanaffectelectricalcomponents.（3）AirSupplyQuality:Manycoordinatemeasuringmachinesuseairbearings,requiringcompressedair.Theairsupplymustbecleanandfreefromoil,water,andotherimpurities.Theairpressureshouldalsomeetcertainrequirements,typically6-8bar.（4）GuideRailCleaningandProtection:Itisrecommendedtoregularlycleantheguiderailswithanhydrousalcohol,usinglint-freepaperforone-sidedcleaning.Noobjectsshouldbeplacedontheguiderails,andtheyshouldnotbetouchedbyhand.（5）VibrationInterference:VibrationsintheenvironmentcansignificantlyaffectboththeCMMcomponentsanditsmeasurementaccuracy.Therefore,measurementroomsshouldnotbelocatednearstrongvibrationsourcesorhigh-noiseareas,suchaspunchingmachines,presses,forgingequipment,orpiledrivers.（6）PowerSupplyRequirements:Thevoltageshouldbe220V±10％，Itisrecommendedtouseanuninterruptiblepowersupply(UPS).04StartupProcedureoftheCoordinateMeasuringMachineTaskII–OperationalRequirementsforCoordinateMeasuringMachines(CMMs)2.4StartupProcedureoftheCoordinateMeasuringMachine05CommonFunctionsoftheControlPanelTaskII–OperationalRequirementsforCoordinateMeasuringMachines(CMMs)2.5CommonFunctions