Optimum position halt manner and optimum position halt device null of the ascent and descent body in

摘要

PURPOSE: To obviate the test operation for getting a setting condition to stop a lifting member to a preset stop position. ;CONSTITUTION: Both of a ring rail and a spindle are rotated by the driving force of a main motor. The ring rail is vertically reciprocated by the driving force of the main motor at a stroke almost equal to the chase length C. When a stop button is pushed during the operation of the ring rail, the rotational speed of the spindle is set to be decelerated and stopped following a specific deceleration pattern shown in the figure. When a stop signal is inputted from a stop button, the deceleration starting position Px to enable the stop of the ring rail at a preset stop position Ps is calculated as a pulse value Cx by a CPU for controlling the drive of the main motor based on the program data stored in a program memory of the CPU. The CPU drives and stops the main motor according to the deceleration pattern shown in the figure when the count of a counter circuit to detect the position of the ring rail reaches the pulse value Cx.;COPYRIGHT: (C)1995,JPO