This invention the plural threads the retraction machine and this kind of retraction machine which winding are done control and/or regards the method of watching in the bobbin. Two bobbin spindles where this retraction machine bobinriboruba which revolution possibly is supported is kept in (1) and extends (3.1 and 3.2) it possesses. The above-mentioned bobbin spindle is guided alternately in the retraction territory and the exchange territory by bobinriboruba, pushes the above-mentioned bobbin spindle, in the retraction territory and the roller (6) and cooperates operates. This pushing roller is kept the roller backing of mobility (20). Watching the vibration which occurs in the above-mentioned bobbin spindle, the measurement equipment (11) is provided in order to control. The above-mentioned measurement equipment, the interval sensor of position fixing (11.1 and 11.2) has had at the time of this inventing, this interval sensor the interval contour which was formed to one among the constitution parts of plural mobility (13) with cooperates operates. Here the vibration of the constitution component which is driven by the vibration of the above-mentioned bobbin spindle, is measured as position change of the above-mentioned constitution component for the above-mentioned machine frame.
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