| 摘要 |
A control system is provided for controlling the speed of a rotation of a coiler, such as a drum, in accordance with the rate at which the material is supplied and the diameter of the turn of the coil being layed at that instant. The material is usually layed first in a spiral of increasing diameter and then in an adjacent spiral of decreasing diameter, so that the speed of rotation of the coiler has to be continuously varied. A first signal is provided as a measure of the actual speed of rotation of the coiler, and a second signal, produced by a potentiometer having a sliding contact controlled by cam means driven in a predetermined relationship with the coiler, is provided as a measure of the required speed of rotation. A regulator compares the signals and controls the speed of the coiler accordingly. |
