附錄1:CalypsoHowtoPositiontheRotaryTableManuallyYoucanpositiontherotarytablemanuallywithCalypsoorusingthejoystick.InCalypso,usetheRTTravelCommandswindow.1SelectResourcesRotaryTableTravelCommandsorclickontheRTTravelCommandsiconinthetoolbar.TheRTtravelcommandsdialogboxappearsonthescreen.ManualPositioning2Tomovetoacertainabsoluteposition:IntheRotateTofield,enterthedesiredanglepositionandclickontheRotateTobutton.3Toexecutearelativeangleincrement:IntheRotateByfield,enterthedesiredangleincrementandclickontheRotateBybutton.Youcanalsousethejoystickofthecontrolpaneltomovetherotarytable.1Todoso,holddownthebuttonintheleftjoystickandmoveittotheleftorright.2Todisplaythepositionyouhavereached,clickontheReadbutton.4-6261212-2010502Calypso(Rev.3.8)PrerequisitesfortheRotaryTableEnteringPatternsViaFileCurrentstatusofRTaxis,youcanalsoenterincrements.Example1Enterthepatternnumberintheinputfield.Calypsousesthistocalculatetherequiredincrementalangleanddisplaysthisinthefieldbelow.2Usethe+andbuttonstosetwhichfeaturethepatternistobepositionedon.TherequiredanglepositionisdisplayedintheRotateTofield.3PositiontherotarytablebyclickingonRotateToaccordingtothedisplayedangleposition.Asanexample,thereisacogwith25teeth,andits6thtoothistobemeasured.360/25=14.46x14.4=86.4Enter“25”asthepatternnumber,clicksixtimeson+andthenontheRotateTobutton.Therotarytablepositionsitselfto86.4andthustothesixthtooth.61212-2010502Calypso(Rev.3.8)4-63PreparingtheMeasurementPlanQualifyingtheRotaryTableAxisTherotarytableaxisdefinestheexactpositionoftherotarytableinrelationtothedevicezeropointaswellasthetiltinrelationtotheCMMaxes,thatis,thepositioninthedevicecoordinatesystem.WorkpiececoordinatesystemRotarytableaxisDevicecoordinatesystemWhentherotarytablerotates,allfeatures,characteristicsandcoordinatesystemsareturnedaroundtheRTaxis.ErrorsinqualifyingtheRTaxisthushaveanimmediateeffectonthemeasurementaccuracy.PracticalNotesonQualifyingtheRotaryTableAxisWhenqualifyingtherotarytableaxis,notethefollowingpracticalinformation:Forqualificationoftherotarytableaxis,alwaysuseaprobethatisasrigidaspossible(e.g.thereferenceprobe).Makesurethattheprobeandnormaland/orworkpieceareascleanaspossiblefortheaxisqualification.Iftheworkpiecetobemeasuredcanonlybemeasuredwithasingleprobesystem,alsousethisforqualifyingtheRTaxis.Thisenablesyoutoavoidinaccuraciescausedbyqualificationerrorsorprobechanges.HowOftendoestheRTAxishavetobeQualified?Therotarytableaxismustbequalifiedonthebasisofthefollowingfactors:Asageneralprinciple,aftereveryhomingoftheCMM.TheRTaxisdefinesthepositionoftherotarytableinrelationtothedevicezeropoint.However,thisisresetduringhomingandcannotbereproducedexactly.4-6461212-2010502Calypso(Rev.3.8)PrerequisitesfortheRotaryTableRegularly,dependingonaccuracyrequirementsandambienttemperature:Ingeneral,foreachprobequalification,therotarytableaxisshouldalsoberequalified.Inthecaseofstrongtemperaturefluctuations,itfrequentlymakessensetorequalifytherotarytableaxispriortoeveryworkpiecemeasurement.ComparisonofQualificationMethodsForqualifyingtherotarytableaxis,therearefourmethodsavailable,eachwithadvantagesanddisadvantages:AdvantagesNoadditionalnormalsarerequired.Measurementcanberunwiththereferenceprobe.Method1-spheremethod2-spheremethodTheRTaxisisqualifiedovertheentireheightoftheworkpiece.ThiscompensatesforresidualperpendicularityerrorsoftheCMMandtheyhavelessofaneffectonthemeasurementinaccuracy.Measurementcanberunwithreferenceprobes.DisadvantagesAllmeasurementsarecarriedoutinthesameZheightoftheCMM.ResidualperpendicularityerrorsoftheCMMcanleadtoseriousmeasurementerrorsinthecaseofmeasurementsatotherZheights.Dependingonthepositionoftherotarytableinthemeasuringrange,itmightoccurthatthecompleterotationrangeisnotcovered.Relativelylongqualificationperiod.Eitherspecialattachmentrequiredonwhichbothspheresarefastened,orlaboriousmanualsettingofthebasealignmentforeachrun.Dependingonthepositionoftherotarytableinthemeasuringrange,itmightoccurthatthecompleterotationrangeisnotcovered.61212-2010502Calypso(Rev.3.8)4-65PreparingtheMeasurementPlanMethodAdvantagesMeasurementcyl-TheRTaxisisqualifiedovertheindermethod“Self-centering”methodentireheightofthecylinder.ThiscompensatesforresidualperpendicularityerrorsoftheCMMandtheyhavelessofaneffectonthemeasurementinaccuracy.ShortmeasurementperiodSimpleattachment；thecylinderisfastenedtotherotarytableinawaythatcanreproducedatanytime.Veryfastmethod.Measurementcanberunwithreferenceprobes.DisadvantagesMeasurementcylinderrequired.Referenceprobecannotbeused.AllmeasurementsarecarriedoutinthesameZheightoftheCMM.ResidualperpendicularityerrorsoftheCMMcanleadtoseriousmeasurementerrorsinthecaseofmeasurementsatotherZheights.Dependingonthepositionoftherotarytableinthemeasuringrange,itmightoccurthatthecompleterotationrangeisnotcovered.Method1-spheremethod2-spheremethodAccordingly,thesemethodsaresuitablefordifferentapplications:ApplicationStandardmethodforrelativelylowaccuracyrequirements.Idealforflatworkpieceswithlargediameters(e.g.ringgears).Thehighestaccuracyisachievediftheworkpieceislocatedatapproximatelythesamemeasurementheightasthespherewasfordeterminationoftheaxis.Fortallworkpieces.Measurementcyl-Fortallworkpieces.indermethod“Self-centering”methodThismethodcanalsobeusedforthemeasurementofshaftswithlowdeviationsinshape.Insteadofusingameasurementcylinder,therotarytableaxisissetdirectlyontheworkpiecepriortoeachrun.UseinproximitytoproductionThefeatureforqualifyingtherotarytableaxiscanbesecureddirectlyontotheworkpiecepalette.Thismakesitpossibletorequalifytherotarytableaxispriortoeveryworkpiecemeasurementwithoutwastingagreatdealoftime.Thesefourmethodsaredescribedbelow.4-66612