《數(shù)控應(yīng)用專業(yè)英語》課件第13章

13FUNCTIONSTOSIMPLIFYPROGRAMMING13.1CANNEDCYCLE13.2RIGIDTAPPING13.1CANNEDCYCLE

Cannedcyclesmakeiteasierfortheprogrammertocreateprograms.

Withacannedcycle,afrequentlyusedmachiningoperationcanbespecifiedinasingleblockwithaGfunction;withoutcannedcycles,normallymorethanoneblockisrequired.Inaddition,theuseofcannedcyclescanshortentheprogramtosavememory.

Table13.1listscannedcycles.

Explanations

Acannedcycleconsistsofasequenceofsixoperations(Fig.13.1(a)).

Operation1:PositioningofaxesXandY(includingalsoanotheraxis)

Operation2:RapidtraverseuptopointRlevel

Operation3:Holemachining

Operation4:Operationatthebottomofahole

Operation5:RetractiontopointRlevel

Operation6:RapidtraverseuptotheinitialpointFig.13.1(a)Cannedcycleoperationsequence

·Positioningplane

ThepositioningplaneisdeterminedbyplaneselectioncodeG17,G18,orG19.

Thepositioningaxisisanaxisotherthanthedrillingaxis.·Drillingaxis

Althoughcannedcyclesincludetappingandboringcyclesaswellasdrillingcycles,inthischapter,onlythetermdrillingwillbeusedtorefertooperationsimplementedwithcannedcycles.

Thedrillingaxisisabasicaxis(X,Y,orZ)notusedtodefinethepositioningplane,oranyaxisparalleltothatbasicaxis.

Theaxis(basicaxisorparallelaxis)usedasthedrillingaxisisdeterminedaccordingtotheaxisaddressforthedrillingaxisspecifiedinthesameblockasGcodesG73toG89.

Ifnoaxisaddressisspecifiedforthedrillingaxis,thebasicaxisisassumedtobethedrillingaxis.

Xp:XaxisoranaxisparalleltotheXaxis

Yp:YaxisoranaxisparalleltotheYaxis

Zp:ZaxisoranaxisparalleltotheZaxis

AssumethattheU,VandWaxesbeparalleltotheX,Y,andZaxesrespectively.ThisconditionisspecifiedbyparameterNo.1022.

G17G81□□□Z--:TheZaxisisusedfordrilling.

G17G81□□□W--:TheWaxisisusedfordrilling.

G18G81□□□Y--:TheYaxisisusedfordrilling.

G18G81□□□V--:TheVaxisisusedfordrilling.

G19G81□□□X--:TheXaxisisusedfordrilling.

G19G81□□□U--:TheUaxisisusedfordrilling.Examples

G17toG19maybespecifiedinablockinwhichanyofG73toG89isnotspecified.WARNING

Switchthedrillingaxisaftercancellingacannedcycle.NOTE

AparameterFXY(No.6200＃0)canbesettotheZaxisalwaysusedasthedrillingaxis.WhenFXY=0,theZaxisisalwaysthedrillingaxis.·TraveldistancealongthedrillingaxisG90/G91

ThetraveldistancealongthedrillingaxisvariesforG90andG91asfollows.Fig.13.1(b)Traveldistancealongthedrillingaxis·Drillingmode

G73,G74,G76,andG81toG89aremodalGcodesandremainineffectuntilcancelled.Whenineffect,thecurrentstateisthedrillingmode.

Oncedrillingdataisspecifiedinthedrillingmode,thedataisretaineduntilmodifiedorcancelled.

Specifyallnecessarydrillingdataatthebeginningofcannedcycles;whencannedcyclesarebeingperformed,specifydatamodificationsonly.·ReturnpointlevelG98/G99

Whenthetoolreachesthebottomofahole,thetoolmaybereturnedtopointRortotheinitiallevel.TheseoperationsarespecifiedwithG98andG99.ThefollowingillustrateshowthetoolmoveswhenG98orG99isspecified.Generally,G99isusedforthefirstdrillingoperationandG98isusedforthelastdrillingoperation.

TheinitialleveldoesnotchangeevenwhendrillingisperformedintheG99mode.Fig.13.1(c)Returnpointlevel·Repeat

Torepeatdrillingforequallyspacedholes,specifythenumberofrepeatsinK-.

Kiseffectiveonlywithintheblockwhereitisspecified.Specifythefirstholepositioninincrementalmode(G91).

Ifitisspecifiedinabsolutemode(G90),drillingisrepeatedatthesameposition.

NumberofrepeatsKThemaximumcommandvalue=9999

IfK0isspecified,drillingdataisstored,butdrillingisnotperformed.·Cancel

Tocancelacannedcycle,useG80oragroup01Gcode.Group01Gcodes

G00:Positioning(rapidtraverse)

G01:Linearinterpolation

G02:Circularinterpolationorhelicalinterpolation(CW)

G03:Circularinterpolationorhelicalinterpolation(CCW)·Symbolsinfigures

Subsequentsectionsexplaintheindividualcannedcycles.Figuresintheseexplanationsusethefollowingsymbols.Fig.13.1(d)Symbolsinfigures13.1.1HighspeedPeckDrillingCycle(G73)

Thiscycleperformshighspeedpeckdrilling.Itperformsintermittentcuttingfeedtothebottomofaholewhileremovingchipsfromthehole.FormatFig.13.1(e)HighspeedPeckDrillingCycle(G73)Explanations

ThehighspeedpeckdrillingcycleperformsintermittentfeedingalongtheZaxis.Whenthiscycleisused,chipscanberemovedfromtheholeeasily,andasmallervaluecanbesetforretraction.Thisallows,drillingtobeperformedefficiently.Settheclearance,d,inparameter5114.

Thetoolisretractedinrapidtraverse.

BeforespecifyingG73,rotatethespindleusingamiscellaneousfunction(Mcode).

WhentheG73codeandanMcodearespecifiedinthesameblock,theMcodeisexecutedatthetimeofthefirstpositioningoperation.Thesystemthenproceedstothenextdrillingoperation.

WhenKisusedtospecifythenumberofrepeats,theMcodeisexecutedforthefirstholeonly;forthesecondandsubsequentholes,theMcodeisnotexecuted.

Whenatoollengthoffset(G43,G44,orG49)isspecifiedinthecannedcycle,theoffsetisappliedatthetimeofpositioningtopointR.Limitations·Axisswitching

Beforethedrillingaxiscanbechanged,thecannedcyclemustbecancelled.·Drilling

InablockthatdoesnotcontainX,Y,Z,R,oranyotheraxes,drillingisnotperformed.·Q/R

SpecifyQandRinblocksthatperformdrilling.Iftheyarespecifiedinablockthatdoesnotperformdrilling,theycannotbestoredasmodaldata.·Cancel

Donotspecifyagroup01Gcode(G00toG03)andG73inthesameblock.

Iftheyarespecifiedtogether,G73iscancelled.·Tooloffset

Inthecannedcyclemode,tooloffsetsareignored.13.1.2LefthandedTappingCycle(G74)

Thiscycleperformslefthandedtapping.Inthelefthandedtappingcycle,whenthebottomoftheholehasbeenreached,thespindlerotatesclockwise.Fig.13.1(f)LefthandedTappingCycle(G74)Explanations

Tappingisperformedbyturningthespindlecounterclockwise.Whenthebottomoftheholehasbeenreached,thespindleisrotatedclockwiseforretraction.Thiscreatesareversethread.

Feedrateoverridesareignoredduringlefthandedtapping.Afeedholddoesnotstopthemachineuntilthereturnoperationiscompleted.

BeforespecifyingG74,useamiscellaneousfunction(Mcode)torotatethespindlecounterclockwise.

WhentheG74commandandanMcodearespecifiedinthesameblock,theMcodeisexecutedatthetimeofthefirstpositioningoperation.Thesystemthenproceedstothenextdrillingoperation.

WhenKisusedtospecifythenumberofrepeats,theMcodeisexecutedforthefirstholeonly;forthesecondandsubsequentholes,theMcodeisnotexecuted.

Whenatoollengthoffset(G43,G44,orG49)isspecifiedinthecannedcycle,theoffsetisappliedatthetimeofpositioningtopointR.Limitations·Axisswitching

Beforethedrillingaxiscanbechanged,thecannedcyclemustbecancelled.·Drilling

InablockthatdoesnotcontainX,Y,Z,R,oranyotheraxes,drillingisnotperformed.·R

SpecifyRinblocksthatperformdrilling.Ifitisspecifiedinablockthatdoesnotperformdrilling,itcannotbestoredasmodaldata.·Cancel

Donotspecifyagroup01Gcode(G00toG03)andG74inthesameblock.

Iftheyarespecifiedtogether,G74iscancelled.·Tooloffset

Inthecannedcyclemode,tooloffsetsareignored.13.1.3FineBoringCycle(G76)

Thefineboringcycleboresaholeprecisely.Whenthebottomoftheholehasbeenreached,thespindlestops,andthetoolismovedawayfromthemachinedsurfaceoftheworkpieceandretracted.FormatFig.13.1(g)FineBoringCycle(G76)WARNING

Q(shiftatthebottomofahole)isamodalvalueretainedwithincannedcycles.ItmustbespecifiedcarefullybecauseitisalsousedasthedepthofcutforG73andG83.Explanations

Whenthebottomoftheholehasbeenreached,thespindleisstoppedatthefixedrotationposition,andthetoolismovedinthedirectionoppositetothetooltipandretracted.Thisensuresthatthemachinedsurfaceisnotdamagedandenablespreciseandefficientboringtobeperformed.

BeforespecifyingG76,useamiscellaneousfunction(Mcode)torotatethespindle.

WhentheG76commandandanMcodearespecifiedinthesameblock,theMcodeisexecutedatthetimeofthefirstpositioningoperation.Thesystemthenproceedstothenextoperation.

WhenKisusedtospecifythenumberofrepeats,theMcodeisexecutedforthefirstholeonly;forthesecondandsubsequentholes,theMcodeisnotexecuted.

Whenatoollengthoffset(G43,G44,orG49)isspecifiedinthecannedcycle,theoffsetisappliedatthetimeofpositioningtopointR.Limitations·Axisswitching

Beforethedrillingaxiscanbechanged,thecannedcyclemustbecancelled.·Boring

InablockthatdoesnotcontainX,Y,Z,R,oranyadditionalaxes,boringisnotperformed.·Q/R

BesuretospecifyapositivevalueinQ.IfQisspecifiedwithanegativevalue,thesignisignored.Setthedirectionofshiftinbits4(RD1)and5(RD2)ofparameter5101.SpecifyQandRinablockthatperformsboring.Iftheyarespecifiedinablockthatdoesnotperformboring,theyarenotstoredasmodaldata.·Cancel

Donotspecifyagroup01Gcode(G00toG03)andG76inthesameblock.Iftheyarespecifiedtogether,G76iscancelled.·Tooloffset

Inthecannedcyclemode,tooloffsetsareignored.13.1.4DrillingCycle,SpotDrilling(G81)

Thiscycleisusedfornormaldrilling.Cuttingfeedisperformedtothebottomofthehole.Thetoolisthenretractedfromthebottomoftheholeinrapidtraverse.FormatFig.13.1(h)DrillingCycle,SpotDrilling(G81)Explanations

AfterpositioningalongtheXandYaxes,rapidtraverseisperformedtopointR.

DrillingisperformedfrompointRtopointZ.

Thetoolisthenretractedinrapidtraverse.

BeforespecifyingG81,useamiscellaneousfunction(Mcode)torotatethespindle.

WhentheG81commandandanMcodearespecifiedinthesameblock,theMcodeisexecutedatthetimeofthefirstpositioningoperation.Thesystemthenproceedstothenextdrillingoperation.

WhenKisusedtospecifythenumberofrepeats,theMcodeisperformedforthefirstholeonly;forthesecondandsubsequentholes,theMcodeisnotexecuted.

Whenatoollengthoffset(G43,G44,orG49)isspecifiedinthecannedcycle,theoffsetisappliedatthetimeofpositioningtopointR.Restrictions·Axisswitching

Beforethedrillingaxiscanbechanged,thecannedcyclemustbecancelled.·Drilling

InablockthatdoesnotcontainX,Y,Z,R,oranyotheraxes,drillingisnotperformed.·R

SpecifyRinblocksthatperformdrilling.Ifitisspecifiedinablockthatdoesnotperformdrilling,itcannotbestoredasmodaldata.·Cancel

Donotspecifyagroup01Gcode(G00toG03)andG81inthesameblock.

Iftheyarespecifiedtogether,G81iscancelled.·Tooloffset

Inthecannedcyclemode,tooloffsetsareignored.13.1.5DrillingCycleCounterBoringCycle(G82)

Thiscycleisusedfornormaldrilling.

Cuttingfeedisperformedtothebottomofthehole.Atthebottom,adwellisperformed,thenthetoolisretractedinrapidtraverse.

Thiscycleisusedtodrillholesmoreaccuratelywithrespecttodepth.FormatFig.13.1(i)DrillingCycleCounterBoringCycle(G82)Explanations

AfterpositioningalongtheXandYaxes,rapidtraverseisperformedtopointR.

DrillingisthenperformedfrompointRtopointZ.

Whenthebottomoftheholehasbeenreached,adwellisperformed.Thetoolisthenretractedinrapidtraverse.

BeforespecifyingG82,useamiscellaneousfunction(Mcode)torotatethespindle.

WhentheG82commandandanMcodearespecifiedinthesameblock,theMcodeisexecutedatthetimeofthefirstpositioningoperation.Thesystemthenproceedstothenextdrillingoperation.

WhenKisusedtospecifythenumberofrepeats,theMcodeisexecutedforthefirstholeonly;forthesecondandsubsequentholes,theMcodeisnotexecuted.

Whenatoollengthoffset(G43,G44,orG49)isspecifiedinthecannedcycle,theoffsetisappliedatthetimeofpositioningtopointR.Restrictions·Axisswitching

Beforethedrillingaxiscanbechanged,thecannedcyclemustbecancelled.·Drilling

InablockthatdoesnotcontainX,Y,Z,R,oranyotheraxes,drillingisnotperformed.·R

SpecifyRinblocksthatperformdrilling.Ifitisspecifiedinablockthatdoesnotperformdrilling,itcannotbestoredasmodaldata.·Cancel

Donotspecifyagroup01Gcode(G00toG03)andG82inthesameblock.Iftheyarespecifiedtogether,G82iscancelled.·Tooloffset

Inthecannedcyclemode,tooloffsetsareignored.13.1.6PeckDrillingCycle(G83)

Thiscycleperformspeckdrilling.

Itperformsintermittentcuttingfeedtothebottomofaholewhileremovingshavingsfromthehole.FormatFig.13.1(j)PeckDrillingCycle(G83)Explanations

Qrepresentsthedepthofcutforeachcuttingfeed.Itmustalwaysbespecifiedasanincrementalvalue.

Inthesecondandsubsequentcuttingfeeds,rapidtraverseisperformeduptoadpointjustbeforewherethelastdrillingended,andcuttingfeedisperformedagain.dissetinparameter(No.5115).

BesuretospecifyapositivevalueinQ.Negativevaluesareignored.

BeforespecifyingG83,useamiscellaneousfunction(Mcode)torotatethespindle.

WhentheG83commandandanMcodearespecifiedinthesameblock,theMcodeisexecutedatthetimeofthefirstpositioningoperation.Thesystemthenproceedstothenextdrillingoperation.

WhenKisusedtospecifythenumberofrepeats,theMcodeisexecutedforthefirstholeonly;forthesecondandsubsequentholes,theMcodeisnotexecuted.

Whenatoollengthoffset(G43,G44,orG49)isspecifiedinthecannedcycle,theoffsetisappliedatthetimeofpositioningtopointR.

Limitations·Axisswitching

Beforethedrillingaxiscanbechanged,thecannedcyclemustbecancelled.·Drilling

InablockthatdoesnotcontainX,Y,Z,R,oranyotheraxes,drillingisnotperformed.·Q/R

SpecifyQandRinblocksthatperformdrilling.Iftheyarespecifiedinablockthatdoesnotperformdrilling,theycannotbestoredasmodaldata.·Cancel

Donotspecifyagroup01Gcode(G00toG03)andG83inthesameblock.Iftheyarespecifiedtogether,G83iscancelled.·Tooloffset

Inthecannedcyclemode,tooloffsetsareignored.13.1.7Smallholepeckdrillingcycle(G83)

Anarborwiththeoverloadtorquedetectionfunctionisusedtoretractthetoolwhentheoverloadtorquedetectionsignal(skipsignal)isdetectedduringdrilling.Drillingisresumedafterthespindlespeedandcuttingfeedratearechanged.Thesestepsarerepeatedinthispeckdrillingcycle.

ThemodeforthesmallholepeckdrillingcycleisselectedwhentheMcodeinparameter5163isspecified.ThecyclecanbestartedbyspecifyingG83inthismode.ThismodeiscancelledwhenG80isspecifiedorwhenaresetoccurs.FormatFig.13.1(k)Smallholepeckdrillingcycle(G83)Explanations·Componentoperationsofthecycle*PositioningalongtheXaxisandYaxis*PositioningatpointRalongtheZaxis*DrillingalongtheZaxis(firstdrilling,depthofcutQ,incremental)

Retraction(bottomofthehole→smallclearanceΔ,

incremental)

Retraction(bottomofthehole→pointR)

Advance(pointR→pointataheightofclearanceΔ

fromthebottomofthehole)

Drilling(secondorsubsequentdrilling,depthofcut

Q+Δ,incremental)*Dwell*ReturntopointR(orinitiallevel)alongtheZaxis,cycleend

Acceleration/decelerationduringadvancingandretractioniscontrolledaccordingtothecuttingfeedacceleration/decelerationtimeconstant.

Whenretractionisperformed,thepositionischeckedatpointR.·SpecifyinganMcode

WhentheMcodeinparameter5163isspecified,thesystementersthemodeforthesmallholepeckdrillingcycle.

ThisMcodedoesnotwaitforFIN.CaremustbetakenwhenthisMcodeisspecifiedwithanotherMcodeinthesameblock.

Example：

M□□M03;→WaitsforFIN

M03M□□;→DoesnotwaitforFIN·SpecifyingaGcode

WhenG83isspecifiedinthemodeforthesmallholepeckdrillingcycle,thecycleisstarted.

ThiscontinuousstateGcoderemainsunchangeduntilanothercannedcycleisspecifiedoruntiltheGcodeforcancellingthecannedcycleisspecified.Thiseliminatestheneedforspecifyingdrillingdataineachblockwhenidenticaldrillingisrepeated.·Signalindicatingthatthecycleisinprogress

Inthiscycle,thesignalindicatingthatthesmallholepeckdrillingcycleisinprogressisoutputafterthetoolispositionedattheholepositionalongtheaxesnotusedfordrilling.SignaloutputcontinuesduringpositioningtopointRalongthedrillingaxisandterminatesuponareturntopointRortheinitiallevel.Fordetails,refertothemanualofthemachinetoolbuilder.·Overloadtorquedetectionsignal

Askipsignalisusedastheoverloadtorquedetectionsignal.TheskipsignaliseffectivewhilethetoolisadvancingordrillingandthetooltipisbetweenpointsRandZ.(Thesignalcausesaretraction).Fordetails,refertothemanualofthemachinetoolbuilder.·Changingthedrillingconditions

InasingleG83cycle,drillingconditionsarechangedforeachdrillingoperation(advance→drilling→retraction).Bits1and2ofparameterOLS,NOLNo.5160canbespecifiedtosuppressthechangeindrillingconditions.

Ⅰ.Changingthecuttingfeedrate

ThecuttingfeedrateprogrammedwiththeFcodeischangedforeachofthesecondandsubsequentdrillingoperations.InparametersNo.5166andNo.5167,specifytherespectiveratesofchangeappliedwhentheskipsignalisdetectedandwhenitisnotdetectedinthepreviousdrillingoperation.Cuttingfeedrate=F·α

Iftherateofchangeincuttingfeedratebecomessmallerthantheratespecifiedinparameter5168,thecuttingfeedrateisnotchanged.

Thecuttingfeedratecanbeincreaseduptothemaximumcuttingfeedrate.

Ⅱ.Changingthespindlespeed

ThespindlespeedprogrammedwiththeScodeischangedforeachofthesecondandsubsequentadvances.Inparameters5164and5165,specifytheratesofchangeappliedwhentheskipsignalisdetectedandwhenitisnotdetectedinthepreviousdrillingoperation.Spindlespeed=S·γ

Whenthecuttingfeedratereachestheminimumrate,thespindlespeedisnotchanged.ThespindlespeedcanbeincreaseduptoavaluecorrespondingtothemaximumvalueofSanalogdata.·Advanceandretraction

Advancingandretractionofthetoolarenotexecutedinthesamemannerasrapidtraversepositioning.Likecuttingfeed,thetwooperationsarecarriedoutasinterpolatedoperations.Thespeedissubjectedtoexponentialacceleration/deceleration.Notethatthetoollifemanagementfunctionexcludesadvancingandretractionfromthecalculationofthetoollife.·SpecifyingaddressI

TheforwardorbackwardtravelingspeedcanbespecifiedwithaddressIinthesameformatasaddressF,asshownbelow:

G83I1000;→1000mm/min

G83I1000-;→1000mm/min

AddressIspecifiedwithG83inthecontinuousstatemodecontinuestobevaliduntilG80isspecifiedoruntilaresetoccurs.·Functionsthatcanbespecified

Inthiscannedcyclemode,thefollowingfunctionscanbespecified:*HolepositionontheXaxis,Yaxis,andadditionalaxis*Operationandbranchbycustommacro*Subprogram(holepositiongroup,etc.)calling*Switchingbetweenabsoluteandincrementalmodes*Coordinatesystemrotation*Scaling(ThiscommandwillnotaffectdepthofcutQorsmallclearanced1.)*Dryrun*Feedhold·Singleblock

Whensingleblockoperationisenabled,drillingisstoppedaftereachretraction.·Feedrateoverride

Thefeedrateoverridefunctionworksduringcutting,retraction,andadvancinginthecycle.·Custommacrointerface

Thenumberofretractionsmadeduringcuttingandthenumberofretractionsmadeinresponsetotheoverloadsignalreceivedduringcuttingcanbeoutputtocustommacrocommonvariables(＃100to＃149)specifiedinparametersNo.5170andNo.5171.ParametersNo.5170andNo.5171canspecifyvariablenumberswithintherangeof＃100to＃149.

ParameterNo.5170：Specifiesthenumberofthecommonvariabletowhichthenumberofretractionsmadeduringcuttingisoutput.

ParameterNo.5171：Specifiesthenumberofthecommonvariabletowhichthenumberofretractionsmadeinresponsetotheoverloadsignalreceivedduringcuttingisoutput.13.1.8TappingCycle(G84)

Thiscycleperformstapping.

Inthistappingcycle,whenthebottomoftheholehasbeenreached,thespindleisrotatedinthereversedirection.FormatFig.13.1(l)TappingCycle(G84)Explanations

Tappingisperformedbyrotatingthespindleclockwise.Whenthebottomoftheholehasbeenreached,thespindleisrotatedinthereversedirectionforretraction.Thisoperationcreatesthreads.

Feedrateoverridesareignoredduringtapping.Afeedholddoesnotstopthemachineuntilthereturnoperationiscompleted.

BeforespecifyingG84,useamiscellaneousfunction(Mcode)torotatethespindle.

WhentheG84commandandanMcodearespecifiedinthesameblock,theMcodeisexecutedatthetimeofthefirstpositioningoperation.Thesystemthenproceedstothenextdrillingoperation.

WhentheKisusedtospecifynumberofrepeats,theMcodeisexecutedforthefirstholeonly;forthesecondandsubsequentholes,theMcodeisnotexecuted.

Whenatoollengthoffset(G43,G44,orG49)isspecifiedinthecannedcycle,theoffsetisappliedatthetimeofpositioningtopointR.Limitations·Axisswitching

Beforethedrillingaxiscanbechanged,thecannedcyclemustbecancelled.·Drilling

InablockthatdoesnotcontainX,Y,Z,R,oranyotheraxes,drillingisnotperformed.·R

SpecifyRinblocksthatperformdrilling.Ifitisspecifiedinablockthatdoesnotperformdrilling,itcannotbestoredasmodaldata.·Cancel

Donotspecifyagroup01Gcode(G00toG03)andG84inthesameblock.Iftheyarespecifiedtogether,G84iscancelled.·Tooloffset

Inthecannedcyclemode,tooloffsetsareignored.13.1.9BoringCycle(G85)

Thiscycleisusedtoboreahole.FormatFig.13.1(m)BoringCycle(G85)Explanations

AfterpositioningalongtheXandYaxes,rapidtraverseisperformedtopointR.

DrillingisperformedfrompointRtopointZ.

WhenpointZhasbeenreached,cuttingfeedisperformedtoreturntopointR.

BeforespecifyingG85,useamiscellaneousfunction(Mcode)torotatethespindle.

WhentheG85commandandanMcodearespecifiedinthesameblock,theMcodeisexecutedatthetimeofthefirstpositioningoperation.Thesystemthenproceedstothenextdrillingoperation.

WhenKisusedtospecifythenumberofrepeats,theMcodeisexecutedforthefirstholeonly;forthesecondandsubsequentholes,theMcodeisnotexecuted.

Whenatoollengthoffset(G43,G44,orG49)isspecifiedinthecannedcycle,theoffsetisappliedatthetimeofpositioningtopointR.Limitations·Axisswitching

Beforethedrillingaxiscanbechanged,thecannedcyclemustbecancelled.·Drilling

InablockthatdoesnotcontainX,Y,Z,R,oranyotheraxes,drillingisnotperformed.·R

SpecifyRinblocksthatperformdrilling.Ifitisspecifiedinablockthatdoesnotperformdrilling,itcannotbestoredasmodaldata.·Cancel

Donotspecifyagroup01Gcode(G00toG03)andG85inthesameblock.Iftheyarespecifiedtogether,G85iscancelled.·Tooloffset

Inthecannedcyclemode,tooloffsetsareignored.13.1.10BoringCycle(G86)

Thiscycleisusedtoboreahole.FormatFig.13.1(n)BoringCycle(G86)Explanations

AfterpositioningalongtheXandYaxes,rapidtraverseisperformedtopointR.

DrillingisperformedfrompointRtopointZ.

Whenthespindleisstoppedatthebottomofthehole,thetoolisretractedinrapidtraverse.

BeforespecifyingG86,useamiscellaneousfunction(Mcode)torotatethespindle.

WhentheG86commandandanMcodearespecifiedinthesameblock,theMcodeisexecutedatthetimeofthefirstpositioningoperation.

Thesystemthenproceedstothenextdrillingoperation.WhenKisusedtospecifythenumberofrepeats,theMcodeisexecutedforthefirstholeonly;forthesecondandsubsequentholes,theMcodeisnotexecuted.

Whenatoollengthoffset(G43,G44,orG49)isspecifiedinthecannedcycle,theoffsetisappliedatthetimeofpositioningtopointR.Limitations·Axisswitching

Beforethedrillingaxiscanbechanged,thecannedcyclemustbecancelled.·Drilling

InablockthatdoesnotcontainX,Y,Z,R,oranyotheraxes,drillingisnotperformed.·R

SpecifyRinblocksthatperformdrilling.Ifitisspecifiedinablockthatdoesnotperformdrilling,itcannotbestoredasmodaldata.·Cancel

Donotspecifyagroup01Gcode(G00toG03)andG86inthesameblock