| 摘要 |
<p>A tensioning apparatus for setting and controlling the level of a tension on a wire P in a coil winding machine has a rotatable main tension pulley 22 which applies a tension to the wire a magnet brake for applying a braking torque to the main pulley. an auxiliary tension pulley 40, an arm 36 carrying the auxiliary tension pulley and rotationally urged by a spring in such a direction as to tense the wire. thereby resiliently absorbing a variation in the tension of the wire, a brake force adjusting mechanism for adjusting the effect of the magnet brake, and adjusting mechanism for adjustment of the spring force acting on the tension arm 36. The brake force adjusting mechanism is controlled by a brake force adjusting stepping motor 200. The arm tension adjusting mechanism also is actuated and controlled by a stepping motor 210. These motors are controlled by a control circuit so as to maintain a set level of the tension on the wire during the winding. <IMAGE></p> |
