| 摘要 |
PURPOSE:To enable a controller to rapidly cope with the alteration of size of a bag by inputting an initial data of the length or the like of a bag, detecting the speed of a motor for driving a feeding roller and a mark Indicating the length of the bag, and most suitably controlling the feed of a film. CONSTITUTION:By inputting means 60, each data is inputted concerning the length of a bag, the number of sheets and length from the cutting position to the mark or the like. When the feed of a film is started and the mark is detected by a mark sensor 30, the position of a speed reduction start and a feeding quantity to the stopping position of the film are calculated to subsequently be converted in a predetermined number of pulses. On the other hand, the speed of a motor 10 for driving a feed roller 11 is calculated as the number of pulses by an encoder 20, and the motor 10 is controlled to meet the number of predetermined pulses by comparing both of them. When the mark is not detected, the film is fed on the basis of the inputted data, and when the mark is not detected In several times continuously. the operation of the motor is stopped. For the alteration of the size of a bag is altered, new data is inputted. |
