Compact device for controlling the supply of thread to a processing machine

A compact device for controlling the supply of a textile or metal thread, unwound from a corresponding support to a processing machine, said supply able to occur from the support to the machine and moving away from the machine towards the support, said device comprising:

• a body bearing at least two rotary members on which the thread is wound and with which rotation velocity detector means are associated for detecting the rotation velocity thereof, these rotation velocity detector means being connected to a control unit,
• tension detecting means for detecting the thread tension connected to such control unit, each of said rotary members being idle and being placed in rotation by the thread moved thereon, the tension detector means being present in proximity thereto,
• the two idle rotary members each cooperating with the rotation velocity detector means to measure the quantity of thread supplied and the velocity, placed in rotation by the thread moved thereon,
• the tension detector means being between the two idle rotary members, the control unit for detecting at least one of
• velocity of the thread.
• the supplied thread quantity, and
• the sliding or rest state of the thread and the slide sense of the thread (F) to detect if the thread is moving towards the processing machine or if the thread is moving away from the processing machine.