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83。 36 鍵盤定義及功能 36 顯示器設(shè)計(jì) 37 顯示器 顯示方式的選用 37 顯示器接口 37 越界報(bào)警電路 37 步進(jìn)電機(jī)接口電路及驅(qū)動(dòng) 38 結(jié)論 40 V 致謝 41 參考文獻(xiàn) 42 VI CONTENTS Abstract Ⅰ Chapter1 Introduction 1 Elect romagic white board overview 1 Product background 1 Product development function and range of 3 Chapter2 System analysis and scheme of order 4 Design parameters 4 General options 4 Overall layout 4 Motion effect of distribution 5 Workpiece size influence of weight and shape 5 The overall scheme 5 Chapter3 Mechanics part 9 Ball screw calculation and choice 9 Axial load 9 Equivalent speed 11 Equivalent load 12 Predetermined dynamic load rating 13 Threads and thread minimum maximum axial variable diameter at the end of Cocking 13 Primaries of ball screw pair designation 14 Determination of ball screw bearing designation 14 Ball screw length to determine the 15 Ball Ehat 17 Compressive Gondo 17 Screw support pair Gond 18 Ball screw ball and