To save labor for gathering many survey data and to drive in a designated time to an optional position in punctual.

One pattern of data, which is obtained at a time when a hanging mechanism 1 or a floor mechanism 2 driven by a variable speed driving device 4 is accelerated to a rated maximum speed to control movement, is previously surveyed to be memorized in a running control chart table as modulating point data, in an automatic arithmetic unit 5. A speed standard arithmetic means uses the data and automatically operates a speed standard value for completing a movement to an optional target position in an appointed time period from a target position determined value and a movement time period determined value that are input from an operating section 6.