| 摘要 |
PURPOSE:To prevent a web-like material from being damaged, by estimating a proportion- integration correcting value to be delivered after shift into a steady-state condition, when the web-like material stretched between two rolls, to be controlled in its tension and speed, is accelerated or decelerated. CONSTITUTION:A tension control section 2 drives a motor 3 to control the tension of a web- like material in accordance with a speed instruction 16 delivered from a linear acceleration and deceleration unit 1. Further, a detector 4 detects the speed of the web-like material and delivers a feed-back signal to the tension control section 2. Further, a drive roll 10 is driven by means of a speed control section 5 and a motor 6 in accordance with an instruction from the linear acceleration and deceleration unit 1 in order to convey the web-like material 12. Further, a tension detector 11 delivers a feed-back signal to the tension control section 2. When the linear acceleration and deceleration unit 1 delivers an acceleration signal 24, a deceleration signal 25 and acceleration and deceleration rate signal 26 to a control section 8 for restraining variations in tension, the control section 8 calculates an integration correcting value to be delivered after shift into a steady-state condition, and delivers a tension correcting signal 22 and a speed correcting signal 23. With this arrangement, it is possible to prevent the web-like material 12 from wrinkling and being broken.
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