>> P.436
Ⅲ36Mounting■ProcessingaccuracyofmountingsurfaceAccuracyandperformanceofPrecisionpositioningtableareaffectedbyaccuracyofmatingmountingsurface.Therefore,processingaccuracyofthemountingsurfacemustbeconsideredaccordingtousageconditionssuchasrequiredmotionperformanceandpositioningaccuracy.ReferenceflatnessofthematingmountingsurfaceundergeneralusageconditionsisindicatedinTable6.Inaddition,thebaseonwhichatableismountedreceivesalargereactiveforce,sotakeenoughcareabouttherigidityofthebase.Table6Accuracyofmountingsurfaceunit:μmModelFlatnessofthemountingsurfaceNT…H5TXTM8TS/CTNT…VNT…XZNT…XZHSA…DESK…W10TSLH…M15TE…BTUTSL…MTC…EBLTAM30TSLB50■TighteningtorqueforfixingscrewTypicaltighteningtorquetofixthePrecisionpositioningtableisindicatedinTable7.Ifsuddenacceleration/decelerationoccursfrequentlyormomentisapplied,itisrecommendedtotightenthemto1.3timeshighertorquethanthatindicatedinthetable.Inaddition,whenhighaccuracyisrequiredwithnovibrationandshock,itisrecommendedtotightenthescrewstotorquesmallerthanthatindicatedinthetableanduseadhesiveagenttopreventloosenessofscrews.Table7Screwtighteningtorqueunit:N・mBoltsizeFemalethreadcomponentSteelAluminumalloyScrewinsertM2×0.40.31M3×0.51.7(1)M4×0.74.0M5×0.87.9About60%ofsteelvalueAbout80%ofsteelvalueM6×113.3M8×1.2532.0M10×1.2562.7Note(1)AstighteningtorqueforNT…V,1.1N・misrecommended.(Whenusingasteelbase)
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