Method and device for controlling a warp beam drive of a weaving

Details Method and device for controlling a warp beam drive of a weaving Method and device for controlling a warp beam drive of a weaving

1986-08-07

1988-06-14

Hornsby, Harvey C.

Textiles: weaving

Warp manipulation

Feeding

139 1E, 139 97, 139100, D03D 4906, D03D 4918, D03D 5100

Patent

active

047505273

ABSTRACT:
In a control for a warp beam drive of a weaving machine, the warp beam drive is regulated at all times by a control which receives input signals representing the number of rotations of the warp beam and representing the tension of the warp threads. If the weaving machine has come to a standstill because of an error which has taken place, then, before the warp beam drive is re-started, the tension on the warp threads is increased to a specific value by rotating the warp beam in reverse, in order, during re-start, to take warp thread tension back to a predetermined normal value again through suitable action on the warp beam drive. The effect of this is that no stop marks or start marks are formed in the woven material as a result of the weaving machine having stood still. This control includes a digital computer, to which the number of rotations of the warp beam is supplied by means of an impulse transmitter, and the tension of the warp threads supplied by means of a motion pickup, which picks up the position of a dancer. The signal from the impulse transmitter guided to the computer is used not only as a number-of-rotations signal, but also as a route signal, especially when the tension on the warp threads is raised to the specific increased value.

REFERENCES:
patent: 4122873 (1978-10-01), Pfarrwaller et al.
patent: 4364002 (1982-12-01), Suzuki et al.
patent: 4529012 (1985-07-01), Sainen et al.
patent: 4537226 (1985-08-01), Gotoh
patent: 4554951 (1985-11-01), Hirano et al.
patent: 4564050 (1986-01-01), Hirano
patent: 4619294 (1986-10-01), Sainen et al.

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