CornerstoneElectronicsTechnologyandRoboticsWeek22MakingaCoupleronaMetalLatheandSandwichPCBAdministration:PrayerTurninquizReviewfrequencyandperiodShowtwoperiodsonanoscilloscopeandcalculatethefrequency.Verifywithafrequencycounter.BuildingRobotsforBeginners,Chapter20,CouplersAcouplerconnectstwothingstogether.Ourcouplerwillallowustoattach/removethewheelsonto/fromSandwich.SAFETYISSUES:Workarea:Keepyourworkareacleanandwelllit.Donotoperatepowertoolsinexplosiveatmospheres,suchasinthepresenceofflammableliquids,gases,ordust.Keepbystandersandvisitorsawaywhileoperatingapowertool.Distractionscancauseyoutolosecontrol.Overconfidenceandbeinginahurrycontributetoaccidents.Electricalpowertools:Doubleinsulatedtoolsareequippedwithapolarizedplug(onebladeiswiderthantheother).Iftheplugdoesnotfitfullyintotheoutlet,reversetheplug.Ifitstilldoesnotfit,donotusethetool.Avoidbodycontactwithgroundedsurfacessuchaspipes,puddlesofwater,andelectricalconduit.Thereisanincreasedriskofelectricshockifyourbodyisgrounded.Donotexposepowertoolstorainorwetconditions.Donotforcetool.Usethecorrecttoolforyourapplication.Donotabusethecord.Neverusethecordtocarrythetoolortopulltheplugfromanoutlet.Alwaysrollupanextensioncordfromtheplugendtoassurethatthecordhasbeenunplugged.PersonalSafety:Stayalert,watchwhatyouaredoingandusecommonsensewhenoperatingapowertool.Dressproperly.Donotwearlooseclothingorjewelry.Containlonghair.Keepyourhair,clothing,andglovesawayfrommovingparts.Avoidaccidentalstarting.Besureswitchis“off”beforepluggingin.Removeadjustingkeysorwrenchesbeforeturningthetool“on”.Usesafetyequipment.Alwaysweareyeprotection.UsingtheLathetoMachinetheCoupler:UsethecaliperstodeterminethediameterofthemotorshaftandthenselectthenextlargerdrillbitsizefromtheDrillSizeChart.DrillSizeChartas.pdffile:HYPERLINK"http://www.cornerstonerobotics.org/excel%20doc/week22_drill_size_chart_with_lines.pdf"http://www.cornerstonerobotics.org/excel%20doc/week22_drill_size_chart_with_lines.pdfAgainusethecalipers