机电专业英语 教学课件 作者 杨寿智 刘水平 Lesson 14.ppt

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1、Lesson14Troubleshooting and MaintenanceforCNCMachineTextCNCmachiningprocessesarequitecommonnowadaysforthemanufactureofindustrialcomponentsinmediumandhighvolumequantities.CNCmaintenanceinvolvesvariousdangers.Beforecheckingtheoperationofthemachine,taketimetobecomefamiliarwithth

2、emanualsprovidedbythemachinetoolbuilder.TroubleshootingforCNCMachineCNCmaintenanceinvolvesvariousdangers.Beforecheckingtheoperationofthemachine,taketimetobecomefamiliarwiththemanualsprovidedbythemachinetoolbuilder.Whenafailureoccurs,itisimportanttocorrectlygraspwhatkindoffail

3、ureoccurredandtakeappropriateaction,topromptlyrecoverthemachine.InvestigatingtheConditionsUnderwhichFailureOccurred:Whendidthefailureoccur?·Dateandtime?·Occurredduringoperation?(howlongwastheoperation?)·Wasthereanylightningsurge,powerfailure,orotherdisturbancestothepowersuppl

4、y?Howmanytimeshasitoccurred·Onlyonce?·Occurredmanytimes?(Howmanytimesperhour,perday,orpermonth?)Withwhatoperationdiditoccur?·WhatwastheNCmodewhenthefailureoccurred?Jogmode/memoryoperationmode/MDImode/referencepositionreturnmode·Ifduringprogramoperation,Whereintheprogram?Which

5、programNo.andsequenceNo.?Whatprogram?Occurredduringaxialmovement?OccurredduringtheexecutionofanM/S/Tcode?Failurespecifictotheprogram?·Doesthesameoperationcausethesamefailure?(Checktherepeatabilityofthefailure.)·Occurredduringdatainput/output?·Forafailurer

6、elatedtofeedaxisservoOccurredatbothlowfederateandhighfederate?Occurredonlyforacertainaxis?·ForafailurerelatedtospindlesWhendidthefailureoccur?(duringpower-on,acceleration,deceleration,orconstantrotation)Whatfailureoccurred?·Whichalarmwasdisplayedonthealarmdisplayscreen?(Check

7、theaxisalongwhichanalarmhasoccurredforalarms300to599.)·Isthescreencorrect?·IfmachiningdimensionsareincurredHowlargeistheerror?IsthepositiondisplayontheCRTcorrect?Aretheoffsetscorrect?Otherinformation·Istherenoiseoriginaroundmachine?Ifthefailurehasnotoccurredfrequently,thecaus

8、emaybeexternalnoisetothepowersupplyofinductivenoiseonmachinerycables