Weft insertion control method

Abstract

A weft picking control method capable of realizing control of a weft picking arriving time with a quick response over a wide range. The weft picking control method in an air-jet loom includes supplying air under pressure to weft picking nozzles, and jetting air under pressure from the weft picking nozzles so as to pick a weft into a warp shed together with the jetted air. Also, a supply passage for supplying the pressurized air to the weft picking nozzles includes high and low pressure supply passages. The passages are arranged in parallel with each other, and the air under pressure is jetted from the weft picking nozzles in cooperation with the two supply passages. A deviation between a weft arrival time of the picked weft and a reference weft arrival time is detected during the weft picking operation, and time for jetting air under high pressure and a weft picking starting time are respectively changed so as to reduce the deviation to zero on the basis of the detected deviation in the next and succeeding weft picking operations.

Dependencies are inferred from the claim text.