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DesignofexperimentalbenchbasedonmotioncontrollerHong-YanSHI1,a,1InnerMongoliaUniversityfortheNationalities,CollegeofMechanicalEngineering,TongLiao,028000,China.
ajdxashy@126.
comKeywords:Experimentalbench,Motioncontroller,Controlsystem.
Abstract.
Thenumericalcontroltechnologyisanimportantindicatortomeasureacountry'scomprehensivenationalstrengthandnationaldefensestrength,withthecontinuousdevelopmentofChina'sscienceandtechnology,NCtechnologyhasbeengreatlyimproved,atthesametime,NCpersonnelisalsorequiredcorrespondingly.
Buttheproblemsofpoorexperimentalconditionsintheprocessofpersonneltrainingisexist,itcannotdoverywellinpracticalteaching,akindofexperimentalbenchisdesignedbasedonthemotioncontrollerinthispaper,thebenchhastheadvantagesofsimplestructure,itiseconomicalandpractical,whichprovidesanewwayfortheteachingofnumericalcontroltechnology.
IntroductionAfteryearsofdevelopment,CNCtechnologyhasbecomethecoreofmodernmanufacturingtechnology[1].
ThelevelofCNCequipment,CNCtechnologyownershipandmanufacturingcapabilitiesofCNCequipmenthavebecomeanimportantsymboltomeasureacountry'slevelofindustrialmodernization.
Thedevelopmentofnumericalcontroltechnologyisthefoundationofnationaldefenseconstructionandtheguaranteeofnationaleconomicdevelopment[2].
WiththedevelopmentofChina'seconomyandtheprogressofscienceandtechnology,themanufacturingindustryhasputforwardhigherrequirementsforequipment,numericalcontrolequipmenthasbecometheinevitabletrendofthedevelopmentofCNCtechnology,integratedpersonnelisurgentlyneeded,anditputsforwardhigherrequirementsontheCNCtalentscultivation[3].
ButthetrainingofNCpersonnelinourcountryhascertainproblems,themainreasonare,thecurriculumandteachingcontentisnotreasonable,equipmentisbackward[4].
Butthenumericalcontroltechnologyandelectromechanicalintegrationtechnologyarepracticaltechnology,itmustcarryonthepracticeexperience,theexperimentalconditionsareinsufficienttomeetthedemandoftheteaching[5].
Inthispaper,kindofexperimentalbenchisdesignedbasedonthemotioncontroller,thebenchhastheadvantagesofsimplestructure,itiseconomicalandpractical,itcaneffectivelysolvetheproblemofinsufficientexperimentalconditions.
Ithasacertainpracticalsignificance.
OveralldesignofthebenchThemechanicalstructuredesignofthebench.
Thebenchhastwodegreesoffreedom,respectivelytheyareXandYdirections.
ItisshowninFigure1,thebenchisdrivenbytwomotors,servomotorisconnectedwiththeballscrewthroughthegearmechanism,theballscrewisconnectedwiththebench,theservomotorrotatestodrivethebench.
Aphotoelectricswitchisputonthebench,whichisusedtocontrolthebenchtofindzero,itprovidedwithalimitswitchattheendofthebench,soastopreventtheoverrunmovementofthebench,itisusedtoensuretheworkstationsafety.
1.
Limitswitch2.
Bench3.
Zeroreturningswitch4.
Yaxismotor5.
XaxismotorFigure1.
ThemechanicalstructuredesignThecontrolsystemdesignofthebench.
ThecontrolsystemofthebenchisshowninFigure2,thecontrolsystemconsistsofPCmachine,motioncontroller,servodriverandservomotor.
Thecoreofthecontrolsystemisthemotioncontroller,motioncontrollerreceivesthesignalfromthePCmachine,andcontrolsthebench,thebenchmakesthecorrespondingmovement.
ThePCandmotioncontrollerisconnectedbyEthernet,theycancommunicatedirectly.
Zeroreturningswitchandlimitswitcharedirectlyconnectedwiththemotioncontroller,inthemotionofthebench,ifthezeroreturningswitchorthelimitswitchistriggered,thesystemautomaticallyreceivesthefeedbacksignal,andmakesthecorrespondingactionaccordingtoprogramtocontrolthebench.
Figure2.
ThehardwareintegrationSoftwaredesignSoftwarestructuredesign.
Themotioncontrolleristhecoreofthecontrolsystemofthebench.
AsshowninFigure3,thecontrolsystemusestheformofupperandlowercomputer.
ThemotioncontrollerisoperatedbasedonPC,itonlyhastheoperationenvironment,thereisnodevelopmentenvironment,soitisnecessarytousePCasthehostmachine,motioncontrollerasslavemachine.
AsshowninFigure4,thesoftwaredesignadoptsmodularization,hierarchicalway,theyaredividedintomanagementmodule,parametermodule,motioncontrolmoduleaccordingtothedifferentlevels.
ThemanagementmoduleandthemoduleparametersarecompletedbyPC,includingthepreparationandmanagement,programsettingsanddisplay;themotioncontrolmoduleiscompletedbythemotioncontroller,includingmotioncontrolandlogiccontrol.
Figure3.
ThemodeofcontrolsystemManagementmoduleParametermoduleMotioncontrolmoduleFigure4.
ThemodulardesignofsoftwareI/Odesign.
ThesendingandreceivingsignalisofsystemthroughtheI/Ointerfaceofcontroller,includingthezeroreturningsignals,limitsignals,indicationsignal,etc.
ThedesignofI/Osystemisshownintable1.
Table1.
SystemI/OdesignInputOutputIN0ZeroreturningOUT0Indicationsignal1signal1IN1ZeroreturningOUT1Indicationsignal2signal2IN2Limitsignal1OUT2Indicationsignal3IN3Limitsignal2OUT3Indicationsignal4OUT4Indicationsignal5OUT5Indicationsignal6Programflowdesign.
Programflowdesignisshowninfigure5.
Firstofall,thesystemdoesinitialization,inspectingoperationstateofsystem,ifthereisanerror,thesystemwillbegiveninstructions,ifthereisnoerror,aftertheinitialization,XaxisandYaxisrespectivelycomesbacktotheorigin,thensetparameterprogramming.
Itcanbeprogrammedonlyafterdeterminingthebenchreferencepoint,otherwisethereisnoprogrammingreference,itmaycausethebenchcross-borderoperation.
Afterprogrammingthebenchwillmovecorrespondingly,ifthebenchisbeyondthelimitswitchposition,thesystemwillautomaticallystoprunningandalarm.
Theoperatingstatuscanbeobservedintheprocessofmovement,includingtheXandYaxisvelocityanddisplacementetc.
Figure5.
WorkflowSummaryAccordingtotheproblemofinsufficientexperimentalconditionsinthecourseofCNCtechnologyandelectromechanicalintegrationof,akindofexperimentalbenchisdesignedbasedonthemotioncontrollerinthispaper,thebenchcanbeusedforCNCtechnologyormechatronicscourse,althoughthissystemcannotachievethehigh-endCNCsystem,butthissystemiseconomicalandpractical,itisspecificallyforteachingthedevelopment,operationandmaintenancecostsarenothigh,iteffectivelysolvesthedifficultproblemofthestudents.
AnewmethodisproposedforthetrainingofNCtechnologyandmechatronicstalents.
References[1]WenGuang,MaHongwei.
CurrentsituationanddevelopmenttrendofCNCtechnology[J].
MechanicalEngineer,2003,(1):9-12.
[2]ZhangFuyuan,FangJianglong.
OnthedevelopmentofCNCtechnologyinChina[J].
Chinesemechanicalengineering,1999,10(10):1100-1103.
[3]LuQijian,LiuMingdeng.
Advancesinnumericalcontroltechnology[J].
Manufacturingtechnologyandmachinetool,2002,(5):5-7.
[4]JiHuaTian.
DemandanalysisofNCtechnicalpersonnel[J].
LiaoningJournalofhighervocationaleducation,2008,10(7):27-28.
[5]WangHaigen,ChengGuobiao,FangZhufang.
ExploringtheNCtechnologypracticeteaching[J].
Experimentaltechnologyandmanagement,2008,25(2):92-94.

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