Weft yarn storing device

Details Weft yarn storing device Weft yarn storing device

1987-09-23

1988-04-26

Gilreath, Stanley N.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

139452, B65H 5120, D03D 4736

Patent

active

047399422

ABSTRACT:
A weft yarn storing device having a rotary yarn guide for winding a weft yarn on a measuring and storing drum, a motor for driving said rotary yarn guide for rotation, which comprises a controller. The controller comprises a frequency pattern generator which generates, upon the reception of a start signal, a control frequency signal of a control frequency pattern having a creep of a low frequency in a deceleration period in which the motor is decelerated; a voltage pattern generator which generates a control voltage signal corresponding to the frequency of the control frequency signal; a pulse width modulating unit which generates a pulse width modulated signal on the basis of the control frequency signal and the control voltage signal; and a driver which applies a DC voltage intermittently to the motor according to the output signal of the PWM unit.

REFERENCES:
patent: 4132368 (1979-01-01), Schiess et al.
patent: 4226379 (1980-10-01), Brouwer et al.
patent: 4368854 (1983-01-01), Valois
patent: 4452402 (1984-06-01), Ghiardo
patent: 4530381 (1985-07-01), Takegawa
patent: 4541462 (1985-09-01), Tholander
patent: 4550754 (1985-11-01), Iida
patent: 4586543 (1986-05-01), Volland et al.
patent: 4651786 (1987-03-01), Griffith

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