| 摘要 |
PURPOSE:To permit the taking-up speed to cooperate with the line speed speedily and correctly by forming the speed instruction for a taking-up motor by amplifying the calculated signal for the deviation between the line speed and the taking-up speed and the speed instruction signal for the line speed. CONSTITUTION:The calculated signal B for deviation S and the speed instruction signal A for line speed V1 are multiplied by an amplifier newly installed and the speed instruction for a taking-up motor 4 is formed. Therefore, when the line speed V1 becomes 1/2, the calculated signal B for the deviation S is reduced to 1/2 by the multiplication, and the taking-up speed V2 speedily corresponds to the line speed V1. Also the taking-up speed V2 does not reduce exceedingly. When the calculated signal B for the deviation S is input into a gate and the signal A for the taking-up speed V1 is input into a source, an amplifier in which the gain can be varied corresponding to the product can be obtained by installing a resistor in the amplifier. |
