上海充通大学 Shanghai Jiao Tong University Power Screw Applicationsl .Power screws >Either screw can move,as in a jack or >Nut can move,as in a positioning device. servomotor nut brg coupling screw lead screw nut base4 Power Screw Applications 1 •Power screws Either screw can move, as in a jack or Nut can move, as in a positioning device