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MicrometersTestingParallelismofMicrometerMeasuringFacesTestingFlatnessofMicrometerMeasuringFacesOpticalparallelreadingdirectiononthespindlesideInterferencefringereadingdirectionOpticalflatAnvilOpticalflatAnvilFurrow-likedepression0.32µm×4=1.28µmwithflatnessofapproximately1.3µmMortar-likedepression0.32µm×2=0.64µmwithflatnessofapproximately0.6µm5.Wipeawayanydust,chipsandotherdebrisfromthecircumferenceandmeasuringfaceofthespindleaspartofdailymaintenance.Inaddition,sufcientlywipeoffanystainsandngerprintsoneachpartwithdrycloth.Usecorrectlyperformedwiththecorrectmeasuringforce.thatmeasurementsconstant-forcedevicetheareso6.7.Whenattachingthemicrometerontoamicrometerstand,thestandshouldclampthecenterofthemicrometerframe.Donotclampwithexcessiveforcewhenattaching.8.Becarefulnottodroporbumpthemicrometeronanything.Donotrotatethemicrometerthimbleusingexcessiveforce.9.AfterusingtheMicrometerforalongperiodoftimeorwhenthereisnoprotectiveoillmvisible,lightlyapplyanti-corrosionoilbywipingitwithaclothsoakedwiththeoil.10.Notesonstorage:■Avoidstoringthemicrometerindirectsunlight.■Storethemicrometerinaventilatedplacewithlowhumidity.■Storethemicrometerinaplacewithlittledust.■Storethemicrometerinacaseorothercontainer,whichshouldnotbekeptontheoor.■Storewiththemeasuringfacesopenabout0.1to1mm.■Donotstorethemicrometerinaclampedstate.OpticalparallelFringesonthespindleside1.Wringtheparalleltotheanvilmeasuringface.2.Closethespindleontheparallelusingstandardmeasuringforceandcountthenumberofredinterferencefringesseenonthemeasuringfaceofthespindleinwhitelight.Intheabovegureaparallelismofapproximately1µmisobtainedfrom0.32µmx3=0.96µm.GeneralNotesonUsingtheMicrometer1.checkCarefullyandspecicationstoselecttheappropriatemodelforyourapplication.measuringaccuracy,range,type,theother2.Leavethemicrometerandworkpieceatroomtemperaturelongenoughfortheirtemperaturestoequalizebeforemakingameasurement.3.Lookdirectlyattheduciallinewhentakingareadingagainstthethimblegraduations.Ifthegraduationlinesareviewedfromanangle,thecorrectalignmentpositionofthelinescannotbereadduetoparallaxerror.(a)(b)(c)SleeveThimbleMicrometers(a)Fromabovetheindexline(b)Lookingdirectlyattheindexline(c)Frombelowtheindexline4.Wipeofft.hemeasuringfacesofboththeanvilandspindlewithlint-freepapersetthestart(zero)pointbeforemeasuring.13-9
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