>> P.11
High-accuracLitematicylengthmeasuringmachineStable,high-accuracymeasurementofseparatorfilmthicknesswithcarbidesphericalcontactpointsInthicknessmeasurementofseparatorfilmforlithium-ionsecondarybatteries,productaccuracydemandshaveshiftedfrom3to5μmorsoto1μmorless,makingitdifficulttoadjusttheparallelismofflatcontactpointsandbasesurfacestoalevelreachingtherequiredaccuracy.Theintroductionofcarbidesphericalcontactpointshasrealizedstablehigh-accuracymeasurementwithlowmeasurementforce.ConventionalissuesWithproductaccuracydemandsreaching1μmorless,itwasdifficulttoadjusttheparallelismofflatcontactpointsandbasesurfaces.MitutoyoproposessolutionsTheuseofcarbidesphericalcontactpointshasrealizedstablehigh-accuracymeasurementwithlowmeasurementforceinfilmthicknessmeasurementWithflatcontactpoints,aminimaltiltwillcausetheedgetodeformthefilm,preventingstablemeasurementWithgentlyroundedsphericalcontactpoints,onlythefaintestdentresults,withstablemeasurementenabledthroughconsistentcontactinthesamestateExpectedeffects・Measuredvaluesnolongerfluctuateduetoparallelismerrors,improvingmeasurementrepeatabilityInlow-measurement-forcemeasurementwithcarbidesphericalcontactpoints,high-accuracythicknessmeasurementwithoutdeformationispossibleevenforsoftworkpieceslikefilm8
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