| 摘要 |
In reversible head winders two bobbin holders (3a, 3b) are alternately used. Each bobbin holder is coupled to a frequency-controllable drive (9a, 9b) associated to a frequency converter (14a, 14b). A sensing roller (6) which in operation is in contact with the surface of the bobbin (5) being formed is also equipped with a drive (10). According to the invention, each frequency converter (14a, 14b) can be switched from the drive (9a, 9b) of the associated bobbin holder (3a, 3b) to the drive (10) of the sensing roller (6). The drive of the sensing roller (6) is electrically connected to the frequency converter (14b) of the bobbin holder (3b) which is momentarily in the ready position. In this manner one can spare a frequency converter for the drive (10) of the sensing roller (6). |
