| 摘要 |
PURPOSE:To certainly prevent the slipping-out and lifting failure of a cage by adding a balance compensating amount to a load compensating amount at the time of start, giving the sum to a driving means as a driving force correcting amount, and then attenuating the balance compensating amount at the point of time when the cage starts running to cut the balance compensation. CONSTITUTION:In the cage position arithmetic part 25 of a control unit, the present position of a cage 9 is calculated as a pulse by the pulse 3a from a speed detector 3, and the pulse number corresponding to a stored standard floor of the cage 9 is attenuated and outputted as a pulse signal 25a. In a balance compensating arithmetic part, a balance compensating amount is calculated from a set table value on the basis of the pulse signal 25a and outputted as a balance compensation signal 26a. In a balance compensation attenuating arithmetic part 27, further, the actual speed 23a of the cage 9 and the balance compensation signal 26a are inputted, and outputted as a signal 27a as they are. When running is started, the balance compensation signal 26a is attenuated at a fixed change ratio and outputted as the signal 27a, and at the point of time when this value becomes zero, compensating operation is cut. |
