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NoGearIsanIsland.doc

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NoGearIsanIsland Asystemisthesumofallitsparts,bothgoodandbad.ByStevenM.Zychinski Mostpeopleprobablydon'tgiveasecondthoughttotheworksofavendingmachine,aslongasitacceptstheirmoney,returnsthecorrectchange,andgivesthemwhattheypaidfor. Whensomeonedepositsmoneyintoavendingmachine,thebillacceptororcoinchangervalidatesitaslegaltenderandissuescredit.Onceaproductselectionbuttonhasbeendepressed,thecontrolsystemtellsthemachinewhatproducttodispenseandtellsthecoinchangertoissuethecorrectamountofchange. CoinAcceptorsInc.designsandmanufacturesvendingmachines,controlsystems,billacceptors,andcoinchangersforthesnackandbeverageindustry.Thecompany,basedin,sellsitsproductsthroughbranchcompaniesasfarawayasEuropeandAustralia. Toimprovetheindustry'smachines,thefirmsetouttoofferahigh-capacitycoinchanger,whichwouldoperateabitdifferently.ItwasduringthedesignofthisdevicethatourengineeringteamatCoinAcceptorswasremindedofanimportantdesignprinciple:Nogearoperatesalone. Ourexplorationstocomeupwiththerightdesignevenincludedamodifiedcutofgearteethtoavoidproblemsofexcessivecontact. Smallgeartrains(above)relyoncarrierplatesaboutthesizeofaquartertomaintainalignment.Theplatesaresecuredwithcenter-punchedpins(below). Acoinchangerusuallyhasasupplyofcoinsstackedintubes.Thenewdesignwouldcollectthecoinsinahopper,andletamechanismatthebottomorientthemforpayback.Itwouldgivethecoinchangergreaterchange-makingcapacity. Alargerchangecapacitywouldimprovetheproductivityofthecompany'smachines.Themoremoneyacoinchangercanstoreanddispense,themoreprofitthevendingmachinecanmakeforitsowner,becauseitcansellmoremerchandisebetweenroutineservicevisits. Thereweresomespecialconsiderationsinthedesign.Sinceasignificantpercentageofvendingmachinesareusedoutdoors,theyaresubjecttoarangeofenvironments.Thecompanysellsitsmachinesincountriesaroundtheglobe.OnemachinecanbesellingsodasonastreetinQuito,Ecuador,almostontheEquator,whileanothermaydispensequick-energysnacksoutsideafillingstationinKiruna,Sweden,abovetheArcticCircle. Thecompanydeter