Weft control on the drums of weft weft reserves inspection sensor with the central microprocessor. Able to complete the weft pre-wound, the winding speed of yarn storage and weft alarm manipulation.

First, the weft pre-wound manipulation. The weft drum always want to pre-reserve a certain amount of weft, which is set based on loom weaving techniques. When to start using the weft feeder pre around the manipulation of the switch can be manipulated. Such as: OFF / ON switch on the LASER / NOVA weft feeder of FDP weft on pre around the switch and so on.

Second, the weft reserve inspection and winding speed control. The weft is the inspection and weft reserves after photoelectric sensors and mechanical sensors. At present, the use of the test of the magnetic Min Huoer sensor. This sensor has a sensitivity, high reliability and long life characteristics. Such as magnetic probe on the LASER / NOVA weft feeder, weft drum, the weft overwhelm the magnetic probe with a certain amount of yarn storage, differences in location of the magnetic probe has been overwhelming or erected, will be sensors found. Microprocessor based on the test results to determine the working status of the weft: acceleration, deceleration or stop. Jet loom weft winding number was decided according to the set the withdrawal cruising number and weft feeder winding speed, if the setting angle of the weft insertion time unwinding four laps, the electromagnetic needle lift each once the winding number of the coded sensor output should be 4 laps: If less than four laps, then accelerate wound; if more than four laps, then slow down the winding.

Third, the broken yarn manipulation. Yarn break sensor test after the end of the weft feeder, once the test to the broken yarn, immediately issued a signal of broken yarn to the loom, used in wrapping weft or downtime.