Method for regulating the supply of weft thread on weaving machi

Details Method for regulating the supply of weft thread on weaving machi Method for regulating the supply of weft thread on weaving machi

1988-11-10

1990-03-20

Jaudon, Henry S.

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

D03D 4736

Patent

active

049092863

ABSTRACT:
A method for regulating the supply of weft thread on weaving machines includes the steps of winding the weft thread from a thread supply by means of a draw-off roller driven by a motor, supplying the thread to an accumulator, and controlling the draw-off roller motor by a pulse train generated on the basis of a set value and a second pulse train whose frequency is proportional to the main shaft of the weaving machine. By adjusting the set value, the speed of the draw-off roller can be adjusted to account for such factors as thread type, thickness extensibility and diameter, and also thread supply package diameter and variations in thread draw-off speed. A device for implementing the method of the invention includes, in a preferred embodiment, a cam, a set value setting unit, a shaft pulse generator for generating the second pulse train, a buffer, and a counter which adds the set value and the second pulse train to generate the first pulse train.

REFERENCES:
patent: 4586543 (1986-05-01), Volland et al.
patent: 4716943 (1988-01-01), Yoshida et al.
patent: 4799517 (1989-01-01), Bucher
Traca-de-Almeida et al., "Rate Dividers Adjust Motor Speed Ratios", Electronic Design, vol. 31, No. 15, Jul. 1983, pp. 2328-2329.

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