Abstract: A control method for a motor driven linear drive device is provided in which: a device control unit receives information representative of measured speed of said device; on receiving a start-up command, start-up of the motor is not initiated if the measured speed is zero; information representative of the speed of the drive devices is monitored; and a control sequence which brings about rotation of the motor in accordance with a pre-programmed acceleration profile is initiated when rotation of the device caused by an external action is detected.

Abstract: A device for winding, at high speed, a yarn onto a rotating support comprises a yarn delivery system, displaced so as to undergo a to-and-fro movement parallel to the surface of said support with rapid deceleration and acceleration at the point of reversal of the to-and-fro movement. A depositing yarn guide of the delivery system is displaced by means of a moving element or cursor associated with a magnetized plate of a linear motor, supplied with two-phase or three-phase current. The stator is formed by at least one assembly of elementary modules placed either face to face or placed so that each lies in the extension of another, each having a plurality of C-shaped magnetic circuits that define, between the ends of their separated legs, an airgap inside which the magnetized plate is positioned, comprising an alternation of North and South poles (N and S), which constitutes the moving element that displaces the cursor carrying the yarn guide.

Abstract: This device for winding, at high speed, a yarn onto a rotating support and comprising a yarn delivery system (5, 6), displaced so as to undergo a to-and-fro movement parallel to the surface of said support with rapid deceleration and acceleration at the point of reversal of the to-and-fro movement, is noteworthy in that the depositing yarn guide (6) is displaced by means of a moving element or cursor (5) associated with a magnetized plate (1) of a linear motor, supplied with two-phase or three-phase current, and in which the stator is formed by at least one assembly of elementary modules placed either face to face or placed so that each lies in the extension of another, each having a plurality of C-shaped magnetic circuits (4) that define, between the ends of their separated legs, an airgap inside which the magnetized plate (1) is positioned, comprising an alternation of North and South poles (N and S), which constitutes the moving element that displaces the cursor (5) carrying the yarn guide (6).