Picking controller for an air jet loom

Details Picking controller for an air jet loom Picking controller for an air jet loom

1988-01-29

1989-05-16

Falik, Andrew M.

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

139452, D03D 4736

Patent

active

048300632

ABSTRACT:
A picking controller for an air jet loom having a main picking nozzle which jets air to pick a weft yarn into a shed, and groups of subnozzles which jet air to help the picked weft yarn run along a picking path, includes a phase angle detector for detecting the phase angle of the air jet loom and a weft yarn arrival detector for detecting the arrival of the free end of the picked weft yarn at an arrival position. It also includes a memory for storing actual arrival phase angles of the picked weft yarns with respect to the phase angle of the air jet loom and a variation detector for determining arrival phase angle variations. A comparator compares the phase angle variations with a predetermined target phase angle variation and provides a signal representing the result of the comparison. A picking condition setting unit sequentially varies the picking condition of the groups of subnozzles according to the signal from the comparator representing the result of comparison. A control unit controls the picking condition of the groups of subnozzles according to a command from the picking condition setting unit and an arithmetic unit determines the correlation between picking condition and arrival phase angle on the basis of the actual arrival phase angle variations, and then determines a picking condition corresponding to the target arrival phase angle variation on the basis of the correlation between picking condition and arrival phase angle.

REFERENCES:
patent: 4658865 (1987-04-01), Gotoh
patent: 4673004 (1987-06-01), Rosseel et al.
patent: 4716941 (1988-01-01), Takegawa
patent: 4732179 (1988-03-01), Takegawa
patent: 4744393 (1988-05-01), Takegawa
patent: 4759392 (1988-07-01), Van Bogaert et al.

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