WEFT INSERTING DEVICE OF AIR JET TYPE LOOM

PURPOSE:To prevent wefting miss based on error detection by controlling air pressure fed to wefting nozzle through pressure control valve based on detection signal of air pressure sensor capable of detecting air density or state related to the density. CONSTITUTION:Wefting air pressure under standard air pressure corresponding to weft kind from wefting pressure presetter and the above mentioned standard air pressure from standard pressure presetter are input to a controller. The controller compares the standard air pressure with detection air pressure from air pressure sensor and when there is difference between the both pressures, preset signal from the above-mentioned wefting pressure presetter is corrected and the corrected signal is output to the pressure control valve. The pressure control valve controls air pressure fed to the wefting nozzle based on the output.