Process for controlling the horizontal movements of yarn carrier

Details Process for controlling the horizontal movements of yarn carrier Process for controlling the horizontal movements of yarn carrier

1994-09-08

1996-04-02

Calvert, John J.

Textiles: knitting

United needle machines

Straight

66203, 364470, D04B 2720, G06F 1546

Patent

active

055029876

ABSTRACT:
A system for controlling the horizontal movements of yarn carrier bars in an automatic loom or knitting machine includes a plurality of yarn carrier bars mounted for horizontal movement, a respective stepper motor operatively connected to each yarn carrier bar to control its movement, a respective programmable motor control unit electrically coupled to each stepper motor, a programmable central controller electrically coupled to all motor control units, an electrical power supply, and an energy storage means which provides sufficient energy for operation of the stepper motors and control units for a short period when power from the power supply is unavailable. Each stepper motor includes an output shaft, and a respective shaft position encoder measures and supplies output shaft position information to the motor control unit. Each motor control unit has means for storing certain parameters needed to control a corresponding stepper motor to drive the corresponding yarn carrier bar to produce the desired weaving or knitting action. According to a method for operating the control system, if the power supply fails, the motor control units drive the motors using energy from the energy storage means according to the parameters to ensure safe operation of the bar without interference with other components, and to align each bar in a respective rest position.

REFERENCES:
patent: 5259216 (1993-11-01), Zorini
patent: 5307648 (1994-05-01), Forkert et al.
patent: 5311751 (1994-05-01), Winter et al.

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