Abstract: An electronic device for delivering yarn to textile machines comprising a motor (1), and an electronic control board (2), which includes a microcontroller, able to control the rotating speed of the motor (1) and the currents in the phases of said motor (1); the device has the purpose of adjusting the delivery of each thread (11), by varying the rotating speed of the motor (1), so as to maintain it as synchronised as possible, according to an adjustable scale factor, with the speed of the textile machine served; the device also stops and starts up when the machine is working, so that the rotating speed of the motor (1) is synchronised with the motion of the thread-tighteners (if textile machines equipped with striping devices having a set of thread-tightener for each knitting station are provided, in which a set of threads of different colours and materials are provided at each drop, according to a prefixed and programmed sequence).

Abstract: A system for selecting the stitch forming organs for textile machines; in particular for circular machines for knitwear, contemplates software management such as to update the status of each individual lever (28) of an activator (20), as well as in predetermined time intervals corresponding to the angular positions that occur every K needles (10) or sinkers (26), where K is the number of levers (28) in line of the activator (20), also in other time intervals corresponding to intermediate angular positions includes between 1 and K; the correct value of these angular positions is determined by the profile of the lever (28) of the activator (20).

Abstract: An electronic device for regulating and controlling the delivery of yarn (18) coming from feed units of textile machines, which is designed to vary the r.p.m. of a d.c. brushless motor (23) so as to keep it as synchronized as possible, according to an adjustable scale factor, with the speed of the textile machine served; the device comprises the d.c. brushless motor (23) and an electronic circuit based upon operation of a microcontroller (21) that is able to control the r.p.m. of the motor (23) and the currents (I1, I2, I3) in the phases of the aforesaid motor (23).

Abstract: A system for selecting the stitch forming organs for textile machines; in particular for circular machines for knitwear, contemplates software management such as to update the status of each individual lever (28) of an activator (20), as well as in predetermined time intervals corresponding to the angular positions that occur every K needles (10) or sinkers (26), where K is the number of levers (28) in line of the activator (20), also in other time intervals corresponding to intermediate angular positions includes between 1 and K; the correct value of these angular positions is determined by the profile of the lever (28) of the activator (20).