Each motor seat after both ends of the shovel flower correctionwill appear motor mounting surface on the screw shaft is not 90°Angle, so we take additional surface to balance correction. Theservo motor is directly connected to the ball screw by coupling,which does not distort or misposition the screw even under heavyloads.This greatlyimproves positioning accuracy, and alsoenables more accurate thread and profile machining.Thesecouplings do not wear out or reduce accuracy afterlong use