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JOURNALOFMECHANICALSCIENCEANDTECHNOLOGY,VOL19,NO1,PP97105,200597ASCHEMEFORANINTERNETBASEDCHECKINGMETHODOFMACHINETOOLSWITHVARIANTCNCARCHITECTUREDONGTTOONKIMDEPARTMENTOFINTELLIGENCEANDPRECISIONMACHINES,KOREAINSTITUTEOFMACHINERYANDMATERIALS,DAEJEON305343,KOREASUNHOKIMMECHATRONICSENGINEERINGMAJOR,COLLEGEOFENGINEERING,DONGEUIUNIVERSITY,BUSAN614714,KOREAKWANGSIKKOHSCHOOLOFELECTRICALENGINEERINGANDCOMPUTERSCIENCE,KYUNGPOOKNATIONALUNIVERSITY,DAEGU702701,KOREATHISPAPERPROPOSESANINTERNETBASEDCHECKINGTECHNIQUEFORMACHINETOOLSWITHVARIANTCOMPUTERIZEDNUMERICALCONTROLLERCNCACCORDINGTOITSARCHITECTURE,CNCISCLASSIFIEDINTOONEOFTWOTYPESCLOSEDARCHITECTURECONTROLLERCAC,WHICHISTHECONVENTIONALCNC,OROPENARCHITECTURECONTROLLEROAC,WHICHISARECENTLYINTRODUCEDPCBASEDCONTROLLERSINCECACHASACLOSEDARCHITECTURE,ITISDEPENDENTONCNCVENDERSPECIFICATIONBECAUSEOFTHIS,ITHASBEENVERYDIFFICULTFORUSERSTOIMPLEMENTAPPLICATIONPROGRAMSINTHECNCDOMAINRECENTLY,THECONVENTIONALCNCOFMACHINETOOLSHASBEENREPLACEDBYAPCBASEDOPENARCHITECTURECNCHOWEVER,NOWMANYCONVENTIONALCACMACHINESAREBEINGOPERATEDTOGETHERWITHOACMACHINESININADEQUATELYEQUIPPEDSHOPFLOORSFORINTERNETBASEDCHECKINGFORVARIANTCNCMACHINESWITHCACANDOAC,ASUITABLESYSTEMATICENVIRONMENTISNECESSARYTHROUGHTHISRESEARCH,FORTHEGLOBALMANAGEMENTOFVARIANTCNCMACHINESBOTHACACANDANOACINTHEMANUFACTURINGSYSTEM,ASUITABLEENVIRONMENTFORINTERNETBASEDCHECKINGOFVARIANTCNCMACHINESWASDESIGNED,ANDTHECHECKINGMETHODSFORCACANDOACMACHINESWERECOMPAREDTHERESULTSOFTHISRESEARCHMAYSERVEASABASEMODELFORGLOBALMONITORINGANDREMOTECONTROLINANINTEGRATEDMANUFACTURINGSYSTEMWITHVARIANTCNCMACHINESCHECKINGPOINTSDEFINEDINTHISRESEARCHARECLASSIFIEDINTOTWOCATEGORIESSTRUCTUREDPOINTANDOPERATIONALPOINTTHEFORMERINCLUDESTHEVIBRATIONOFBEARING,TEMPERATUREOFSPINDLEUNIT,ANDOTHERPOINTSOFPERIODICALMANAGEMENT,WHILETHELATTERINCLUDESOILCHECKING,CLAMPLOCKING/UNLOCKING,ANDMACHININGON/OFFSTATUSKEYWORDSINTERNETBASEDCHECKINGMETHOD,VARIANTCNC,CAC,0ACIINTRODUCTIONWIDESPREADUSEOFCOMPUTERSANDTHEINTERNETCORRESPONDINGAUTHOR,EMAILKDH680KIMMREKRTELT82428687148FAXT824286871509DEPARTMENTOFINTELLIGENCEANDPRECISIONMACHINES,KOREAINSTITUTEOFMACHINERYANDMATERIALS,DAEJEON305343,KOREA9MANUSCRIPTRECEIVEDJUNE11,2004REVISEDOCTOBER25,2004HAVELEDTOACONTINUOUSLYINCREASINGDEMANDFORINTERNETBASEDCONTROLANDMONITORINGOFCNCMACHINESFORDISTRIBUTEDGLOBALMANAGEMENTINMANUFACTURINGSYSTEMSINTHEPAST,THECONTACTPOINTSOFPROGRAMMABLELOGICCONTROLLERPLCWEREUTILIZEDFORTHEMONITORINGOFI/OSIGNALSASSOCIATEDWITHCNCMACHINESANDPERIPHERALEQUIPMENTINMANUFACTURINGSYSTEMSHOWEVER,THISSOLUTIONHASBEENLIMITEDTOTHEMONITORINGOFCNCINTERNALINFORMATIONITHASCOPYRIGHTC2005NURIMEDIACO,LTD98DONGHOONKIM,SUNHOKIMANDKWANGSIKKOHBEENDIFFICULTTOCHECKVARIOUSMONITORINGDATAREGARDINGTHECNC,PERIPHERALEQUIPMENT,ANDOTHEREXTERNALUNITSBYIMPLEMENTINGUSERDEFINEDPROGRAMSTOTHECNCDOMAINROBERANDSHIN,1995LEEETAL,2004THEREQUIREDUSERDEFINEDPROGRAMSAREAPPLICATIONMODULESFORTHEMONITORINGOFCNCMACHINESANDFORCOMMUNICATIONWITHAREMOTESITERECENTLY,ACONVENIENTENVIRONMENTABLETOIMPLEMENTUSERDEFINEDPROGRAMSTOACNCDOMAINFORREMOTEMONITORINGANDCONTROLHASBEENPROVIDED,SINCETHECONVENTIONALCNCOFMACHINETOOLSHASBEENREPLACEDBYAPCBASEDOPENARCHITECTURECNCROBERANDSHIN,1995KWONETAL,2000HONGETAL,2003HOWEVER,MANYCONVENTIONALCACMACHINESARENOWBEINGOPERATEDININADEQUATELYEQUIPPEDSHOPFLOORSINORDERTODOAREMOTECHECKONSUCHVARIANTCNCMACHINES,ASUITABLEENVIRONMENTFOREACHCASEOFTHECACANDTHEOACSHOULDBECONSTRUCTEDWEWILLNOWBRIEFLYOUTLINETHERELATEDRESEARCHREGARDINGRESEARCHONTHEMANAGEMENTOFMACHINETOOLSWITHOPENARCHITECTURECNCINMANUFACTURINGSYSTEMS,THEREHAVEBEENSTUDIESONRAPIDPARTREALIZATIONINFLEXIBLEFACTORYSYSTEMSWRIGHT,1995ANDONAUTOMATICCONFIGURATIONANDDYNAMICRECONFIGURATIONOLDKNOWANDYELLOWLEY,2001ASTUDYONSWITCHINGFUNCTIONGENERATORSADDRESSEDTHEMAINTENANCEMECHANISMOFMACHINETOOLSWITHOPENARCHITECTURECNCKIMETAL,2002REMOTECONTROLANDMONITORINGOFMACHINETOOLSBYCLIENTSERVERENVIRONMENTSHASALSOBEENINVESTIGATEDOLDKNOWANDYELLOWLEY,2001KIMETAL,2003THEREPRESENTATIVEEXAMPLESFORSUCHREMOTESERVICESAREFACTORYWINDOWSANDREMOTESYSTEMSTHATAREDEVELOPEDBYACOMMERCIALCNCVENDORKIMETAL,2000KANGANDKANG,1999HOWEVER,THESESYSTEMSARECHARACTERIZEDBYBASICTECHNICALSUPPORTINLOCALDOMAINENVIRONMENTSBESIDESOFTHIS,ASFORRESEARCHONINTERNETBASEDMANAGEMENTOFMACHINETOOLS,CNCIMPLEMENTEDFAULTDIAGNOSISANDBASICREMOTESERVICESWEREREPORTEDKIMETAL,2003WEBBASEDMONITORINGHASBEENSTUDIEDINAFLEXIBLEMANUFACTURINGSYSTEMJUNGETAL,2001FURTHERMORE,PUBLICSWITCHEDTELECOPYRIGHTC2005NURIMEDIACO,LTDPHONENETWORKPSTNANDDIGITALI/OMODULESWEREUTILIZEDFORRESEARCHONTHEMAINTENANCEOFCNCMACHINESHYUNETAL,1998HOWEVER,THESERESEARCHESHAVEFOCUSEDONONLYOACMACHINESEXCEPTCACMACHINESANDTHEMOSTSERVICEFUNCTIONISTOTRANSMITMONITORINGDATAVIATELEPHONELINEOREXTERNALNETWORKSUCHASINTERNETALTHOUGHINTHECASEOFINTERNETBASEDAPPLICATION,ASPECIALCLIENTTERMINALPROGRAM,WHICHISDEPENDENTOFDEVELOPER,HASTOBEINSTALLEDBECAUSETHEMOSTCASESAREBASEDONCLIENTSERVERCONFIGURATIONINSOMESPECIALCASES,ANADDITIONALKERNELISOPTIONALLYREQUIREDBESIDES,THETHIRDPARTYOFSUPERIORCNCVENDORSUCHASSIEMENSSUPPORTSPARTIALLYTHEWEBSERVICESVIAINTERNETHOWEVER,INTHISCASE,THESERVICEFUNCTIONSARENOTOFTENSUITABLETOTHESHOPFLOORANDTHEMODIFICATIONOFTHEFUNCTIONSISVERYDIFFICULTINDOMESTICCASE,EVENREPRESENTATIVECNCVENDORCANNOTSERVICEGENERALLYANDCOMMERCIALLYTHEINTERNETBASEDCHECKINGSERVICESSUCHASCONDITIONSMONITORINGVIALNTERNETTHECAUSEOFSUCHACTUALCIRCUMSTANCEMENTIONEDABOVEISBECAUSEMOSTOPERATORSANDCNCVENDORSHAVEFOCUSEDONTHESTABILITYANDORIGINALABILITYOFCNCINDOMESTICCNCMARKETTHATIS,MOSTCNCVENDORSAREAFRAIDOFTHEBREAKDOWNOFCNCMACHINETOOLSDUETOOVERLOADANDFAULTSRESULTINGFROMADDITIONALSOFTWAREINSTALLATIONORUPGRADEFORTHEPURPOSEOFSUPPORTINGTHEFUNCTIONSSUCHASREMOTESERVICESINSHORT,ALTHOUGHTHEREARESOMERESEARCHESAVAILABLEFORMACHINESWITHOAC,SATISFIEDAPPLICATIONCASESARERAREYETANDTHESTUDIESONMACHINESWITHCACHAVEBEENVERYDEFICIENTESPECIALLY,RESEARCHONINTERNETBASEDCHECKINGFORVARIANTCNCMACHINESWITHACACANDANOACHASNOTBEENSUFFICIENTLYREPORTEDDUETOTHEINCONVENIENTDEVELOPMENTENVIRONMENTANDINFERIORSOFTWAREPORTABILITYTHISPAPERINVESTIGATESMETHODSFORAPPLYINGINTERNETBASEDCHECKINGTECHNIQUESTOVARIANTCNCMACHINESWITHOACANDCAC,ANDTHETWOTYPESOFCNCARECOMPAREDANDANEFFICIENTSCHEMEFORINTERNETBASEDCHECKINGFORVARIANTCNCMACHINESISSUGGESTEDTHROUGHTHISSTUDYFIRST,REMOTECHECKINGANDCONTROLOFTHEDIGITALASCHEMEFORANLNTERNETBASEDCHECKINGMETHODOFMACHINETOOLSWITHVARIANTCNCARCHITECTURE99SIGNALSASSOCIATEDWITHCACMACHINESANDCOMPONENTPARTSBYUSINGAWEBI/OEMBEDDEDMODULEAREINTRODUCEDSECOND,THISPAPERCONSIDERSTHEREMOTECHECKINGOFANALOGANDDIGITALSIGNALSASSOCIATEDWITHOACMACHINESBYIMPLEMENTINGUSERDEFINEDAPPLICATIONPROGRAMSABLETOINTERFACEWITHANEXTERNALSERVERTOTHECNCDOMAIN,ANDBYUSINGADATAACQUISITIONUNITDAUABLETOACQUIREDATACONNECTEDWITHTHECONTACTPOINTSOFMACHINESANDPERIPHERALEQUIPMENTSCACHASACLOSEDARCHITECTUREWHICHISDEPENDENTONCNCVENDERSPECIFICATIONBECAUSEOFTHIS,ITHASBEENVERYDIFFICULTFORUSERSTOIMPLEMENTANAPPLICATIONPROGRAMINCNCTHEREFORE,ASPECIAL,ADDITIONALMODULEISREQUIREDFORINTERNETBASEDAPPLICATIONSENATECHNOLOGIES,2002FORTHIS,AWEBI/OEMBEDDEDMODULEWASAPPLIEDFORINTERNETBASEDCHECKINGINTHISRESEARCHTHEMODULEISDIRECTLYATTACHEDTOTHETCP/IPNETWORKFORCOMMUNICATIONWITHAREMOTESITEINORDERTOOBTAINTHEMONITORINGDATAOFCNCMACHINES,THEI/OSIGNALSOFTHEMODULEWEREASSIGNEDTOPLCI/OSIGNALSWITHINCNCONTHEOTHERHAND,OACHASAPCBASEDOPENARCHITECTURETHATOPERATESINDEPENDENTOFCNCVENDORSPECIFICATIONANDNOADDITIONALMODULEISNECESSARYFORCONNECTIONWITHAREMOTESITEBECAUSEOFTHIS,ASIMPLEDAU,WHICHISNOTDIRECTLYATTACHEDTOOACMAINBOARDANDNOTDIRECTLYAFFECTSTOCNCSTABILITY,ISUSEDFORSIGNALSENSINGANDDATAACQUISITIONVIARS232/422LINEWITHOUTADDITIONALCOMMUNICATIONDEVICEMODULEFORINTERNETBASEDREMOTECHECKINGOFMACHINETOOLSWITHOAC,AUSERDEFINEDDAEMONFORCOMMUNICATIONANDAPPLICATIONPROGRAMSFORWEBSERVICESWEREIMPLEMENTEDINTHEFORMOFINTERNALFUNCTIONWITHINOACANDANEXTERNALSERVERINTERNETCOMMUNICATIONISPERFORMEDBETWEENTHEDAEMONPROGRAMOFTHECNCDOMAINANDWEBSCRIPTPROGRAMSOFTHEEXTERNALSERVER2STRUCTUREOFVARIANTCNCMACHINESANDREMOTECHECKINGDIRECTIONSASMENTIONEDABOVE,THEIMPLEMENTATIONOFACOPYRIGHTC2005NURIMEDIACO,LTDUSERDEFINEDAPPLICATIONPROGRAMISMUCHMOREDIFFICULTINTHECACTHANINTHEOACDUETOTHEINCONVENIENTDEVELOPMENTENVIRONMENTOFTHECACBECAUSETHECACISFULLYDEPENDENTONTHECNCVENDOR,ASSHOWNINFIG1A,THECACCANNOTSUPPORTTHEAPPLICATIONOFUSERFUNCTIONSTHATCANCONNECTWITHTHENETWORKANDREMOTELYCHECKCNCMACHINESINTHECNCDOMAINHOWEVER,ASSHOWNINFIG1B,ITISCONVENIENTFORUSERSTOIMPLEMENTTHEAPPLICATIONPROGRAMSFORREMOTECHECKINGINTHEOACDOMAINBECAUSETHEOACHASANOPENARCHITECTUREBASEDONAPCFORINTERNETBASEDREMOTECHECKINGOFTHESETWOCNCMACHINESTHATAREOPERATEDTOGETHERINAMANUFACTURINGSYSTEM,ASUITABLESYSTEMENVIRONMENTMUSTBECONSTRUCTEDACCORDINGTOTHESTRUCTURECHARACTERSOFTHEVARIANTCNCTHECONVENTIONALCACWITHCLOSEDARCHITECTURECANEFFICIENTLYUSETHENETWORKSUPPORTEDUNITWITHEMBEDDEDWEBSERVERFUNCTIONSBECAUSECONNECTINGTHEI/OSIGNALSOFTHEAPPLIEDUNITWITHTHEI/OSIGNALSOFCNCMACHINESISPOSSIBLETHISMETHODHASANRELATIVELYSIMPLESYSTEMARCHITECTUREFORUSERS,BUTITSFATALFLAWISTHATITCANNOTMANAGEMULTIPLECNCMACHINESSIMULTANEOUSLYWITHASINGLESERVERANDWEBSCRIPTPROGRAMTHISMETHOD,USINGWEBSERVERFUNCTIONSEMBEDDEDINTHEDEVICE,REQUIRESTHATANINDIVIDUALINTERNETPROTOCOLIPADDRESSBEASSOCIATEDWITHEACHMACHINEFORTHERECENTLYPOPULARIZEDOACWITHAACNCWITHCLOSEDARCHITECTURECONTROLLERBCNCWITHOPENARCHITECTURECONTROLLERFIG1STRUCTUREOFVARIANTCNCMACHINES100DONGHOONKIM,SUNHOKIMANDKWANGSIKKOHPCBASEDOPENARCHITECTUREENVIRONMENT,INSTEADOFUSINGNETWORKSUPPORTEDUNITSTHATREQUIREADDITIONALUNIQUEIPADDRESSES,ASUITABLEMETHODISASFOLLOWSFIRST,ADAUISUTILIZEDINORDERTOACQUIREI/ODATATHENTHEAPPLICATIONPROGRAMFORDATAACQUISITIONISIMPLEMENTEDINORDERTOCHECKI/OCONTACTSIGNALSTHROUGHTHEDAU,ANDTHEINTERFACEDAEMONPROGRAM,THATCANTRANSMITTHEACQUIREDDATAFROMACNCDOMAINTOANEXTERNALSERVER,ISIMPLEMENTEDINTHECNCDOMAINAPARTICULARLYOUTSTANDINGMERITOFTHISSYSTEMISTHATALOTOFCNCMACHINESCANBEMONITOREDANDMANAGEDSIMULTANEOUSLYWITHOUTANADDITIONALDEVICEWITHEMBEDDEDWEBSERVERFUNCTIONSTHISMETHODALSOHASGOODEXPANSIBILITY3DEFINITIONOFCHECKINGPOINTSASSHOWNINTABLE1,THECHECKINGPOINTSDEFINEDINTHISRESEARCHARECLASSIFIEDINTOTWOCATEGORIESSTRUCTUREDPOINTANDOPERATIONALPOINTTHEFORMERINCLUDESTHEVIBRATIONOFBEARING,ANDTHETEMPERATUREOFTHESPINDLEUNITANDOTHERSPECIFICUNITS,WHILETHELATTERINCLUDESOILCHECKING,CLAMPLOCKING/UNLOCKING,ANDOTHERDIGITALCHECKINGPOINTSASSOCIATEDWITHMACHINEOPERATIONSTABLE1DEFINITIONOFCHECKINGPOINTSTRUCTUREDCONDITIONSOPERATIONALCONDITIONSVIBRATIONOFBEARINGSMACHININGONTEMPERATUREOFSPINDLEMACHININGOFFVIBRATIONOFBEARING2FAULTNOREADYTEMPERATUREOFSPINDLE2OILCHECKINGVIBRATIONOFBEARING3CLAMPLOCK/UNLOCKTEMPERATUREOFSPINDLE3SUBUNITON/OFF4INTERNETBASEDCHECKINGMETHODFORCACMACHINESTHISSECTIONDESCRIBESTHEAPPLICATIONOFANINTERNETBASEDCHECKINGMETHODFORCACMACFIG2HINESINREMOTEMONITORINGOFCHECKEDRESULTSCOPYRIGHTC2005NURIMEDIACO,LTDANDRELATEDINFORMATIONWITHCACMACHINES,THEAPPLICATIONPROGRAMIMPLEMENTATIONANDTHEPROGRAMRUNNINGENVIRONMENTINTHECNCDOMAINAREMORELIMITEDTHANINANOACENVIRONMENTTHATCANEASILYIMPLEMENTSOFTWAREFUNCTIONSBECAUSEANADDITIONALDEVICEMODULEISNECESSARY,WEUTILIZEDTHEI/OMODULEWITHEMBEDDEDMINIMUMOPERATINGSYSTEMANDWEBSERVERFUNCTIONS,ASSHOWNINFIG2BYAPPLYINGTHISMODULE,THECONTROLANDMONITORINGOFCNCMACHINESWEREREMOTELYPERFORMEDINTHEEXPERIMENTTHEAPPLIEDDEVICEMODULESUPPORTSATOTALOF32I/OCONTACTPOINTSINORDERTOINTERFACEWITHEXTERNALDEVICESTHECONTACTPOINTSWERECONNECTEDWITHTHEPLCI/OSIGNALSOFTHECACMACHINETHROUGHTHESEPOINTS,THEMACHINESTATUSSUCHASCYCLESTART,STOP,EMERGENCYSTOP,ANDMACHININGON/OFFSTATUSCANACTUALLYBEMONITOREDINAWEBENVIRONMENTTHEPROCEDUREFORTHEAPPLICATIONTESTISASFOLLOWSTHEICONSASSOCIATEDWITHTHEI/ODEVICEMODULEAREFIRSTDESIGNEDINDEFAULTHTMLSOURCEBYUSINGTHESUPPLIEDDEVICEUTILITY,ANDTHENTHEICONSPROPERTIESAREASSIGNEDTOSPECIFICI/OADDRESSESNEXT,NETWORKSUPPORTEDJAVACLASSISINSERTEDINDEFAULTHTMLSOURCEANDTHESOURCECODESARECOMPILEDBYTHEUTILITYCOMPILERAFTERTHAT,CODEDWEBSCRIPTFILESARETRANSFERREDTOTHESPECIFICFILEINDEXFORMATSOTHATTHEYCANBEINTERPRETEDBYTHEDEVICEMODULEENGINESENACACMACHINEQ“DPLC/PMCZ176I,NOOOOOO_“DIGITALTLOCONNECTIONDIGITALI/0INTERFACEMETHODLBROWSERETHERNETCABLEIHUB/SWITCHTINTERNETBASEDCHECKINGCONFIGURATIONUSINGEMBEDDEDWEBI/ODEVICEFORCACMACHINEASCHEMEFORANINTERNETBASEDCHECKINGMETHODOFMACHINETOOLSWITHVARIANTCNCARCHITECTURE101TECHNOLOGIES,2002THETRANSFERREDFILE,THATISINTHEFORMOFASPECIFICFORMAT,ISASINGLEIMAGEFILEFORMATTHATISDOWNLOADEDTOFLASHMEMORY,ASSHOWNINFIG3INORDERTOASSIGNTHEPHYSICALI/ODEVICEADDRESSESINAPPLICATIONSOURCECODES,THEREALI/OADDRESSESAREMAPPEDWITHTHEICONPROPERTIESINWEBSCRIPTSOURCESSUCHASHTML,VBSCRIPT,ANDJAVASCRIPT,ASSHOWNINFIG4FIG5SHOWSTHATTHESTATUSOFTHECACMACHINEISNOWCHECKEDASMACHININGONWHENTHECYCLESTARTBUTTONISSELECTEDTHROUGHAWEBBROWSERANDTHROUGHADDITIONALANALOGCHECKINGEXPERIMENTFORSTRUCTUREDCONDITIONS,BEARINGVIBRATIONANDSPINDLETEMPERATUREWEREMONITOREDINREALTIMETHEREMOTECHECKINGMODELOFTHECACMACHINEANDITSIMPLEMENTATIONMETHODARERELATIVELYSIMPLEANDCONVENIENT,BUTADATABASEANDLARGESCALESCRIPTFILESCANNOTBELOADEDINIUSERDEFINEDAPPLICATIONMODULESICNNEETORTOINTERACTPOWERSUPPLY16POSENSORNPUTCONTTCPOINTFIG3INTERFACEBETWEENEMBEDDEDWEBI/ODEVICEANDAPPLICATIONPROGRAMDETAIL,AMAXIMUM512KBYTESAPPLICATIONSCRIPTPROGRAMCANBEDOWNLOADEDTOTHEWEBI/OEMBEDDEDDEVICEMODULEHOWEVER,THISMETHODCANBEVERYEFFICIENTINAPPLICATIONSASITUSESANI/OBOARDINDEPENDENTOFOTHERSYSTEMSHERE,FORREMOTECHECKING,WEBSCRIPTWASCODEDBYUSINGJAVAAPPLETANDWASDOWNLOADEDTOTHEWEBI/OEMBEDDEDDEVICEMODULEFORINTERFACINGWITHTHEI/OOFTHECNCMACHINE,I/OCONTACTPOINTSWEREDIRECTLYCONNECTEDWITHEACHOTHERBETWEENTHEEMBEDDEDWEBI/ODEVICEANDTHEMACHINEI/OSIGNALSTESTRESULTSCONFIRMEDTHATTHEAPPLICATIONSYSTEMENVIRONMENTCANBEEASILYDESIGNEDBYUSINGTHISCHECKINGMETHODTABLE2HARDWARESPECIFICATIONOFUSEDWEBI/ODEVICEITEMCONTENTCPU8BITMICROPROCESSOR512KBFLESHMEMORYMEMORYUSERWEBFILE/PARAMETERAPPNETWORK10BASETETHERNETIEEE8023CONNECTIONEXTERNAL16POINTDIGITALINPUT,CONNECTION16POINTDIGITALOUTPUTINTERNETPROTOCOLHTTP/TCP/UDP/IP/ETHERNETBOARDVENDORDEPENDENCY,UTILITYSOFTWAREIPSETTING/WEBPAGEUPLOADINGICONSANDHTMLIMPLEMENTATIONBYUSINGDEVICEUTILITY1ICONSPROPERTYSETTINGFORI/OADDRESSCONNECTIONBUILDINGSOURCETODEVICEIDEPENDENTFORMATIDOWNLOADINGFILETOFLASHMEMORYIOFEMBEDDEDDEVICESERVER1IPCONNECTIONOFDEVICEANDWEBT/OTESTINGFIG4ADDRESSSETTINGANDTESTINGOFWEBI/ODEVICECOPYRIGHTC2005NURIMEDIACO,LTDXLTAD,I,808,PQFIG5CHECKINGFORCACMACHINEBYUSINGEMBEDDEDDEVICESERVER102DONGHOONKIM,SUNHOKIMANDKWANGSIKKOH5INTERNETBASEDCHECKINGMETHODFOROACMACHINESINTHECASEOFTHEOAC,ANADDITIONALDEVICEMODULEFORNETWORKSUPPORTISNOTREQUIRED,ASTHEOACHASACONVENIENTSTRUCTURETHATCANIMPLEMENTNETWORKAPPLICATIONPROGRAMSTOCHECKANDACQUIREMACHINEI/OSIGNALDATA,ONLYASIGNALPROCESSINGBOARDOREXTERNALDAUFORDATAACQUISITIONISNEEDEDASMOSTOACISBASEDONASINGLEBOARDCOMPUTERWITHACOMPACTARCHITECTURE,ADAUTHATCANSIMPLYCONNECTI/OSIGNALSISMOREEFFICIENTTHANTHEBOARDTYPEADVANTECH,2002THEAPPLICATIONOFACHECKINGMETHODTHATCANNOTIFYTHECHECKINGTIMEANDTHEREPLACEMENTTIMEOFCOMPONENTPARTSWASTRIEDBYMONITORINGOFMACHININGSTATUS,TEMPERATURE,ANDVIBRATIONOFCOMPONENTPARTSTHROUGHTHEDAUTHROUGHTHISAPPLICATION,THEANALOGANDDIGITALCONTACTPOINTSOFCNCMACHINESANDPERIPHERALUNITSWEREMONITOREDBYUSINGTHEDAUINTHEEXPERIMENT,ANEXTERNALI/ODAUMODULEWASUSEDINORDERTOREDUCEHARDWAREDEVICESIZESANDMINIMIZETHELOADTHEINTERNETBASEDCHECKINGCONFIGURATIONUSINGDAUFORANOACMACHINEISSHOWNINFIG6RS485COMMUNICATIONWASINTERNALLYPERFORMEDTHROUGHRS232/485CONVERSIONSPECIFICATIONARANGEOF0VTO15VWASASSIGNEDANDASAMPLINGPERIODWASASSIGNEDAS10TIMESPERSECONDINORDERTOACQUIREANALOGTRANSFERREDVALUESFORTHEEXPERIMENTFORACQUIRINGBEARINGVIBRATIONANDSPINDLETEMPERATURE,“0“0007ANALOGINPUTFIELDMSSOLSERVER70LINGSOLLINKS/ODBCDTIVSTRUCTUREDQUERLANOACLRRMIPCBASEOPENARCHITECTURECONTROLLERDAUDATAACQUISITIONUNITIMODELNOADAM4000SEDESPROLORDIGITALINPUT8BITOOOOCODESENSORSANALOGINPUT01,5VRANGEITEMPERATUREINSPECTIONIFIG9INTERFACEBETWEENOACANDAPPLICATIONPROGRAMOFWEBSEVERTIONPROGRAMS,ASSHOWNINFIG10RESULTSSHOWTHATTHISCHECKINGMETHODISADVANTAGEOUSINTHATITSCONVENIENTDEVELOPMENTENVIRONMENTINTERMSOFSOFTWARECANEASILYIMPLEMENTUSERDEFINEDAPPLICATIONPROGRAMS6SCHEMEANDEXAMPLEOFINTERNETBASEDCHECKINGFORVARIANTCNCMACHINESTHESCHEMEFORINTERNETBASEDCHECKINGFORVARIANTCNCMACHINESISSUGGESTEDINFIG11THECACMACHINEAREAISDESIGNEDTOCHECKDIGITALDATABYUSINGDOWNLOADEDSCRIPTCODESANDTHEI/OINTERFACEMECHANISMOFTHEEMBEDDEDDIGITALIAELIBEDDEDWEBII0MODULECLOSEDARCNTERCONTROLLER_JPENTTMCFUENVLROTLNENTOPENACHITECTURECOLLTROLLERENVIRONMENTFIG11INTERNETBASEDCHECKINGENVIRONMENTFORVARIANTCNCMACHINESMOIREMOTEDIGITALINPUTMONITORINGROLSAM4,R“OSASREALDIVALSROLSR7/IIRDISB/XHSTATUS0OLLCFFIG10ICURRENTADMONITORINGREALDVALUESCHECKINGFOROACMACHINEBYUSINGDAUANDAPPLICATIONPROGRAMKILLCACMACHINEOACMACHINE/M,CH,O,OO,O0OIT/ELAINESTATUSIRO,EXAMPLEOFINTERNETBASEDREMOTECHECKINGFORVARIANTCNCMACHINESFIG12COPYRIGHTC2005NURIMEDIACO,LTD104DONGHOONKIM,SUNHOKIMANDKWANGSIKKOHDEVICESERVERTHEOACMACHINEAREAISDESIGNEDTOCHECKANALOGDATAANDDIGITALDATABYUSINGDAUANDAPPLICATIONPROGRAMSSUCHASADATAACQUISITIONMODULE,ACOMMUNICATIONDAEMONMODULE,ANDAWEBSCRIPTMODULETHEINTERNETBASEDREMOTECHECKINGFORVARIANTCNCMACHINESTHROUGHTHEPROPOSEDSCHEMEISDEMONSTRATEDINFIG12INTHECASEOFTHECACMACHINE,AJAVAAPPLETWASCODEDANDDOWNLOADEDINORDERTOCHECKTHEMACHINEI/ODATAANDTOPROVIDETHECHECKEDRESULTTOCLIENTSTHROUGHAWEBBROWSERTHEI/OADDRESSESASSIGNEDBETWEENTHEJAVAAPPLETCODESANDTHEREALI/OPOINTSOFTHEMACHINESWASMONITOREDANDCONTROLLEDFROMAREMOTESITETHEDEMONSTRATEDCONTENTISTHERESULTOFMONITORINGTHEI/OCONTACTPOINTSASSOCIATEDWITHCURRENTMACHININGON/OFFSTATUSTHECACMACHINEISNOWBEINGOPERATEDBYACYCLESTARTBUTTONONAWEBBROWSERINTHECASEOFTHEOACMACHINE,THEACQUIREDMONITORINGDATAFROMDAUWERETRANSMITTEDTOANEXTERNALSERVERBYTHECOMMUNICATIONDAEMONANDWERESERVICEDINAREMOTESITEITWASCONFIRMEDTHROUGHAWEBBROWSERTHATANOILSENSORWASACTIVATEDANDTHATTHESPINDLETEMPERATUREWAS00007WHICHISTHEANALOGVALUEWITHTHERANGEFROM0TO15VRESULTSSHOWTHATTHEFORMERCASE,CAC,ISADVANTAGEOUSINTHATITCANEASILYREALIZETHELNTERNETBASEDCHECKINGSYSTEMBYUTILIZINGTHEWEBFUNCTIONEMBEDDEDDEVICEINTHEHARDWAREHOWEVER,THEMAXIMUMSIZESOFTHEUSERDEFINEDAPPLICATIONPROGRAMSANDTHEDOWNLOADINGDATAARELIMITEDTO512KBYTESTHELATTERCASEHASMERITINTHATITSCONVENIENTDEVELOPMENTENVIRONMENTCANEASILYIMPLEMENTMANYVARIOUSAPPLICATIONPROGRAMSINTHECNCDOMAINWITHOUTADDITIONALDEVICESHOWEVER,USERDEFINEDAPPLICATIONPROGRAMMINGWORKS