summary
Water jet loom is a new shuttleless loom which appeared in 1950s. The main difference of water jet loom, air-jet loom and rapier loom is the difference of weft insertion mechanism. Water jet loom relies on water flow with certain pressure, that is, the friction between jet and fiber, carries weft yarn through the shed to make warp and weft interweave into fabric.
At present, in the weaving Market, the production efficiency of each factory has been affected by the air stop and missing stop, and with the continuous improvement of fabric quality requirements, the main control unit in the whole weaving process has become more important.

Electronic control layout
The five in one integrated controller of water jet loom is equipped with the original high-performance servo system and loom special frequency converter, forming an intelligent electric control system for water jet loom.
The whole system layout is compact and orderly, suitable for the existing standard electric control box; the main controller, frequency converter and servo system are independently developed and produced, with high brand unity; contactors, relays, etc. are imported products, stable and guaranteed.

System topology

The control system of water jet loom includes: 1 water jet loom controller, 2 sets of servo system (3 sets for double warp axis), 1 tension sensor, 1 encoder and other special sensors for loom (edge hinge sensor, waste edge sensor, motor overheat sensor).
As the main control unit, the controller controls the start and stop of the main motor, and can be over started by the contactor or frequency converter, so that the torque and speed of the motor at the moment of starting can meet the requirements. The controller is connected with touch screen and servo driver, and receives signals from multiple sensors at the same time. The system parameters can be set on the touch screen, including speed setting, weft density setting, tension setting, pattern setting, etc. at the same time, pulses can be sent to the servo driver to control the speed of let off and take-up. The key of the whole system is the controller. According to the signal fed back to the controller by the encoder of the main motor, the angle is divided to determine the action of each component controlled by the controller (including weft storage device, yarn gripper, rotary valve, weft detector, etc.) at each fixed angle. The controller also samples the tension sensor in the rotation angle of one cycle, and takes the signal of 360 points and the average value to obtain the actual tension value, so as to control the speed of the servo motor.
The servo drivers are directly controlled by the controller and work in position mode. According to weft density, tension and other parameters, the controller sends pulses to the servo driver to determine the speed and position of the servo motor.
The tension sensor is installed on the warp shaft to monitor the tension of the warp in real time. At the same time, the winding diameter is calculated according to the set winding diameter to ensure that the tension value is constant during the operation of the machine.
Special sensors on other looms are: weft detector, crimp sensor, waste edge sensor, and some overheating sensors. The weft detector is a very important part of the loom system. Its main function is to detect whether the weft reaches the back edge in time. In case of weft breakage, weft shrinkage and other phenomena, the whole system must stop at a fixed angle in time, so as to facilitate the stop man to deal with it. If other sensors are abnormal, they should also be fed back to the controller, so as to stop for processing.

Technical highlights
Weaving navigation
Built in textile expert database algorithm, according to fabric conditions, fabric specifications and machine conditions, automatically set more appropriate operation parameters.
Digitization of weft survey
The main controller has built-in digital weft detection technology, and the system will automatically calculate the relevant weft detection parameters when inputting yarn characteristics on the touch screen, which is simple and easy to operate, and greatly reduces the phenomenon of idle stop and missed stop.
Optimize parking
Advanced power transmission coil control algorithm, tension control algorithm, combined with longdrive electric high-performance servo system, can effectively avoid the occurrence of stop gear problem, and a variety of parking gear compensation methods are built in.
Support process parameter copy
Process parameters and other data can support the U disk copy function, set and reuse once. According to the different yarn characteristics, it is stored as the corresponding file. After changing the yarn, you only need to call the U disk file to start the operation.