| 摘要 |
PURPOSE:To prevent fluctuation of tention by correcting the torque command in accordance to the torque correction amount to be set with correspondence to the differential speed of motors for performing roll control at the inlet side and the processing side then controlling the motor for loop car on the basis of said correction command. CONSTITUTION:When feeding an iron plate 10 to be processed through rewind reel 1, bridle rolls 2, 3 and loop car 4 to the processing section, the difference between the speed commands v1c, v2c of motors 2A, 3A for each bridle roll 2, 3 and the speeds detected through speed detectors 2E, 3F will appear as the load torque variation of motor 29 for loop car. The speed vL of loop car 4 is followed by tension correcting circuit 45 with correspondence to said differential speed. In other word, the difference between a torque command and required torque is operated then the torque produced from motor 4C for loop car 4 will follow the required torque thus to eliminate fluctuation of tension to be applied onto the iron board 10. |
