RETURNING A MOVABLE PART TO ITS ORIGINAL POINT

摘要

A method of returning a movable top guide to the original point as defined by a frame of a machine body. The method comprises the steps of first moving in one direction the top guide to the frame at a high speed, moving the opposite direction the top guide away from the frame at an intermediate speed for a prescribed length of time after an overrun switch set at a point a little beyond the original point is rendered non-conductive, moving in one direction the top guide to the frame at a low speed and stopping the movement of the top guide when the original point switch provided at the original point is rendered nonconductive.