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,INTHIS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CONFIGURATIONUSINGDAUFORANOACMACHINEISSHOWNINFIG6RS485COMMUNICATIONWASINTERNALLYPERFORMEDTHROUGHRS232/485CONVERSIONSPECIFICATIONARANGEOF0VTO15VWASASSIGNEDANDASAMPLINGPERIODWASASSIGNEDAS10TIMESPERSECONDINORDERTOACQUIREANALOGTRANSFERREDVALUESFORTHEEXPERIMENTFORACQUIRINGBEARINGVIBRATIONANDSPINDLETEMPERATURE,“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