| 摘要 |
PURPOSE:To provide a drawframe having such a mechanism that on output of the sensor for detecting the unevenness of silver delivered through a pair of front rollers is fed to a specific level amplifier to converge sliver size to a specified value without making the construction of control circuit complicated. CONSTITUTION:An output of a sensor 9 for detecting the unevenness of a sliver 10 delivered through a pair of front rollers 7 is fed to a level amplifier 11, where this output received is compared with a reference value, the result derived being entered in the first addition circuit, and the output signal therefrom read out periodically and stored. The memory signal is added to the control signal V2 from a motor control circuit 12 by the second addition circuit, thus regulating the speed ratio of the first motor 6 to the second motor 8. |
