Picking period setting device for a loom
AssigneeTsudakoma Kogyo Kabushiki Kaisha
InventorYujiro Takegawa
Life of this patent
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Abstract
A picking period setting device for a loom to decide an appropriate picking period for satisfactory picking operations. A shedding curve calculating circuit is used which calculates shedding curves representing the shedding motion of heddle frames. A shedding stroke calculating circuit calculates a set of desired shedding stroke curves. An appropriate picking period deciding circuit decides a precise picking period defined by the crank angles of the loom on the basis of the result of comparison of the shedding curves and the desired shedding stroke curves. Thus, the weaving operation of the loom is continued without interruptions caused by faulty picking.
Claims8
A picking period setting device for a loom said loom having shedding curves, heddle frames, a main shaft, said heddle frame having a curved shedding stroke, said loom further having reed beating angles and for producing cloth and having a crank angle, comprising:
- shedding curve calculating means for calculating the shedding curves representing the positional variation of the heddle frames of the loom with the crank angle of the main shaft of the loom;
- desired shedding stroke calculating means for calculating desired shedding stroke curves representing the variation of the shedding strokes of the heddle frames as a function of a weft yarn passing range defined on the reed, beating angle, the position of the cloth fell and the crank angle of the loom;
- and
- appropriate picking period deciding means for deciding an appropriate picking period on the basis of comparison of the shedding curves and the desired shedding stroke curves
Dependencies are inferred from the claim text.