Device for controlling the take-up speed of a winding frame

A control device for controlling the take-up speed of at least one winding frame with double drive, for winding textile yarns, the winding frame including at least one spindle for gripping at least one winding support, a pilot roller for the peripheral drive of the winding, and a gas turbine, integral with the spindle, for axial drive, said control device operating on the turbine, using the speed of the pilot roller as the reference, and governing a variation in the flow rate in the supply circuit of the turbine when the winding tube or the winding is out of contact with the pilot roller, said control device comprising:

• a first pulse emitting device for emitting pulses at a frequency corresponding to the angular speed of said pilot roller,
• a calculating unit which receives the pulses from the emitter and itself emits pulses at a required frequency of the spindle, corresponding to the desired take-up speed, after two coefficients have been fed in, namely a first coefficient which is a function of the geometry of the winding frame (diameter of the pilot roller and diameter of the winding support), and a second coefficient which represents the ratio of the desired take-up speed to the peripheral speed of the pilot roller,
• a second pulse emitting device for emitting pulses at a frequency corresponding to the angular speed of the spindle, and
• a frequency comparator which receives the pulses on the one hand from the calculating unit and on the other hand from the emitter associated with the spindle, performs the comparison and, from this comparison, controls a system for regulating the fluid supply of the turbine.