| 摘要 |
PURPOSE:To keep responsiveness constant and to maintain a stable operation and the accuracy of sheet thickness, by obtaining the spring constant of a material to be rolled from the changes of a rolling down force and a roll gap, etc., and changing the gain of a sheet thickness controlling system. CONSTITUTION:The outputs of a pulse genertor 16, a load cell 6, a deviation signal device 8, a roll gas detector 5, etc. are inputted to a command changing device 14. The device 14 calculates a spring constant and also calculates the gain of a servoamplifier 10 by using the spring constant respectively to output a gain changing command to the servo-amplifier 10. Thus the responsiveness is kept constant, and a stable operation and the accuracy of sheet thickness are maintained because the loop gain of the controlling system is kept in a optimum state by changing the gain of the servoamplifier 10 even if the spring constant of sheet is changed. |
