《數(shù)控應用專業(yè)英語》課件第11章

11AUXILIARYFUNCTION

11.1AUXILIARYFUNCTION(MFUNCTION)11.2MULTIPLEMCOMMANDSINASINGLEBLOCK11.3MCODEGROUPCHECKFUNCTION11.4THESECONDAUXILIARYFUNCTIONS(BCODES)11.1AUXILIARYFUNCTION(MFUNCTION)

WhenanumeralisspecifiedfollowingaddressM,codesignalandastrobesignalaresenttothemachine.Themachineusesthesesignalstoturnonoroffitsfunctions.

Usually,onlyoneMcodecanbespecifiedinoneblock.Insomecases,however,uptothreeMcodescanbespecifiedforsometypesofmachinetools.

WhichMcodecorrespondstowhichmachinefunctionisdeterminedbythemachinetoolbuilder.

ThemachineprocessesalloperationsspecifiedbyMcodesexceptthosespecifiedbyM98,M99,M198orcalledsubprogram,orcalledcustommacro.Refertothemachinetoolbuilder’sinstructionmanualfordetails.Explanations

ThefollowingMcodeshavespecialmeanings.·M02,M30(Endoftheprogram)

Thisindicatestheendofthemainprogram.

AutomaticoperationisstoppedandtheCNCunitisreset.

Thisdifferswiththemachinetoolbuilder.

Afterablockspecifyingtheendoftheprogramisexecuted,controlreturnstothestartoftheprogram.

Bit5ofparameter3404(M02)orbit4ofparameter3404(M30)canbeusedtodisableM02,M30fromreturningcontroltothestartoftheprogram.·M00(Programstop)

AutomaticoperationisstoppedafterablockcontainingM00isexecuted.

Whentheprogramisstopped,allexistingmodalinformationremainsunchanged.Theautomaticoperationcanberestartedbyactuatingthecycleoperation.Thisdifferswiththemachinetoolbuilder.·M01(Optionalstop)

SimilarlytoM00,automaticoperationisstoppedafterablockcontainingM01isexecuted.ThiscodeisonlyeffectivewhentheOptionalStopswitchonthemachineoperator’spanelhasbeenpressed.·M98(Callingofsubprogram)

Thiscodeisusedtocallasubprogram.Thecodeandstrobesignalsarenotsent.·M98(Endofsubprogram)

Thiscodeindicatestheendofasubprogram.

M99executionreturnscontroltothemainprogram.Thecodeandstrobesignalsarenotsent.Seethesubprogramsection13.3fordetails.NOTE

TheblockfollowingM00,M01,M02,orM30isnotpreread(buffered).Similarly,tenMcodeswhichdonotbuffercanbesetbyparameters(No.3411to3420).Refertothemachinetoolbuilder’sinstructionmanualfortheseMcodes.11.2MULTIPLEMCOMMANDSINASINGLEBLOCK

Ingeneral,onlyoneMcodecanbespecifiedinablock.However,uptothreeMcodescanbespecifiedatonceinablockbysettingbit7(M3B)ofparameterNo.3404to1.UptothreeMcodesspecifiedinablockaresimultaneouslyoutputtothemachine.ThismeansthatcomparedwiththeconventionalmethodofasingleMcommandinasingleblock,ashortercycletimecanberealizedinmachining.Explanations

CNCallowsuptothreeMcodestobespecifiedinoneblock.

However,someMcodescannotbespecifiedatthesametimeduetomechanicaloperationrestrictions.FordetailedinformationaboutthemechanicaloperationrestrictionsonsimultaneousspecificationofmultipleMcodesinoneblock,refertothemanualofeachmachinetoolbuilder.

M00,M01,M02,M30,M98,M99,orM198mustnotbespecifiedtogetherwithanotherMcode.

SomeMcodesotherthanM00,M01,M02,M30,M98,M99,andM198cannotbespecifiedtogetherwithotherMcodes;eachofthoseMcodesmustbespecifiedinasingleblock.

SuchMcodesincludethesewhichdirecttheCNCtoperforminternaloperationsinadditiontosendingtheMcodesthemselvestothemachine.Tobespecified,suchMcodesareMcodesforcallingprogramnumbers9001to9009andMcodesfordisablingadvancereading(buffering)ofsubsequentblocks.Meanwhile,multipleofMcodesthatdirecttheCNConlytosendtheMcodesthemselves(withoutperforminginternaloperations)canbespecifiedinasingleblock.Examples11.3MCODEGROUPCHECKFUNCTION

TheMcodegroupcheckfunctionchecksifacombinationofmultipleMcodes(uptothreeMcodes)containedinablockiscorrect.

Thisfunctionhastwopurposes.OneistodetectifanyofthemultipleMcodesspecifiedinablockincludeanMcodethatmustbespecifiedalone.

TheotherpurposeistodetectifanyofthemultipleMcodesspecifiedinablockincludeMcodesthatbelongtothesamegroup.Ineitherofthesecases,P/SalarmNo.5016isissued.

Fordetailsongroupdatasetting,refertothemanualavailablefromthemachinetoolbuilder.

Explanations·Mcodesetting

Upto500Mcodescanbespecified.Ingeneral,M0toM99arealwaysspecified.McodesfromM100andupareoptional.·Groupnumbers

Groupnumberscanbesetfrom0to127.Note,however,that0and1havespecialmeanings.Groupnumber0representsMcodesthatneednotbechecked.Groupnumber1representsMcodesthatmustbespecifiedalone.11.4THESECONDAUXILIARYFUNCTIONS(BCODES)

IndexingofthetableisperformedbyaddressBandafollowing8digitnumber.TherelationshipbetweenBcodesandthecorrespondingindexingdiffersbetweenma