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1、英文文献翻译：原文：TheopensystemmeritofComputerNumericalControlTheopensystemmeritisthesystemsimple,thecostlow,buttheshortcomingistheprecisionislow.Thereversegap,theguidescrewpitcherror,stopinferiorlycanaffectthepointingaccuracybymistake.Followingseveralkindofimprovementsmeasure
2、maycausethepointingaccuracydistinctimprovement.1.reversegaperrorcompensatesThenumericalcontrolenginebedprocessingcuttingtoolandtheworkpiecerelativemotionisdependsuponthedriveimpetusgear,theguidescrewrotation,thustheimpetusworkfloorandsoonmovestheparttoproducemovesreali
3、zes.Astraditionalpartgear,guidescrewalthoughthemanufactureprecisionisveryhigh,butalwaysunavoidablyhasthegap.Asaresultofthiskindofgapexistence,whenmovementdirectionchange,startsthesectiontimetobeabletocauseinevitablyactuatesthepartwastingtime,appearstheinstructionpulset
4、opushthemotionlessfunctionalelementtheaspect.Thishasaffectedtheenginebedprocessingprecision,namelytheinstructionpulseandactualentersforthestepdoesnottally,hastheprocessingerrortherefore,thesplit-ringnumericalcontrolsystemallestablishesgenerallyhasthereversegaperrorcomp
5、ensatoryfunction,withbymakesupwhichwastestimethestepreversegapdifferencecompensatesisfirstactualreverseentersfortheerror,convertsthepulseequivalentnumberit,compensatesthesubroutineasthegaptheoutput,whenthecomputerjudgmentappearswheninstructionforcountermotion,transfers
6、thegaptocompensatethesubroutineimmediately,compensatesthepulseaftertheoutputtoeliminatethereversegaptocarryonagainnormallyinsertsmakesupthemovement.2.oftenthevaluesystematiccharacteristicpositionerrorcompensatesAkindofstorehousebytransfersforthedesigner.Likethisintheco
7、mponentsdesignstage,thedesigneronlymustinputthecharacteristictheparameter,thesystemdirectproductioncharacteristicexamplemodel:Wemustsavetherelatedcharacteristicclassinthedatabasethestructureinformation,thedatabasetablecollectionareuseinsavingthispartofrelatedinformatio
8、n.Accordingtothecharacteristictypedefinitionneed,wedefinedthecharacteristicclasscodetable,thecharacteristicclassediti
