| 摘要 |
The thread tension regulator, which is suitable in particular for a cross-winding spooling machine, has a movably mounted thread feeler (15) which diverts the thread (1) and is held in equilibrium with the thread tension by a soft spring (23). Arranged on both sides of the desired position of equilibrium of the thread feeler (15) are contactless switches (H1, H2), for example Hall switches, which generate digital signals when the thread feeler (15) is deflected out of its desired position of equilibrium. The rectangular signals generated by the switches (H1, H2) control directly or via a bistable memory an integration stage with downstream mean value formation stage, the integration stage being switchable in one predetermined integration direction when the pulses of the rectangular signals follow one another in a predetermined sequence and switchable in the opposite integration direction when the when the pulses follow one another in the opposite sequence. The signal generated by the mean value formation stage is a measure for the size and direction of the mean deviation of the thread tension from the desired value. The switches (H1, H2) control, via a regulator (41), an electromagnetic thread brake (11). As the spring (23) is relatively soft, periodic changes in the thread speed on the thread guide (7) of the spool (5) to be wound do not result in thread tension changes at the thread brake. <IMAGE>
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