Monte Carlo simulation of a new control strategy for the weft brake on air-jet looms

In air-jet weaving, weft insertion time depends on the characteristics and properties of the weft yam. Because deviations of properties within bobbins exist, a control system is sometimes required to obtain a sufficiently eve n arrival time of the weft yam. This paper presents a new control strategy to obtain a more constant arrival time over the bobbin. The control strateg y is illustrated and tested using a Monte Carlo simulation. For this purpos e, a mathematical model for weft insertion on air-jet looms is developed. T he new control strategy shows good results.