Tension sensors are utilized on air jet looms

Textile machine, also known as weaving machine or loom, is an important parameter in the textile processing process. The tension of the yarn is directly related to the product quality, production efficiency, and smooth progress of subsequent processing. Therefore, the testing and control of yarn tension have always been a matter of great concern.

Textile machines are divided into shuttle looms and shuttleless looms according to the weaving method. Shuttle looms use traditional shuttle weaving machines, which have large volume and weight, and are repeatedly projected back and forth. The machine has large vibrations, high noise, slow speed, and low efficiency. Shuttleless looms have various methods of yarn insertion, including rapier, jet (water jet, air jet), and projectile.

Rapier loom: Use a rigid or flexible rapier head to guide the weft yarn. Air jet loom: Use compressed air jets to pull the weft yarn and pass it through the shuttle. Water jet loom: Use water as the medium to generate friction and traction on the weft yarn by jetting water flow, and introduce the weft yarn into the shuttle through a fixed tube. Projectile loom: Use small projectile shuttles with clamps to hold the weft yarn and project it for yarn insertion. Currently, there are many air jet looms in the market, and the Toyota 710 or Tsudakoma Corporation's ZAX-E ZAX-N ZA9100 looms have the largest market share.

We are discussing the testing and control of yarn tension on a jet loom. The jet loom detects the total warp tension through tension sensors, and the warp tension changes caused by the opening, loosening, feeding, and winding diameter changes of the warp beam, controlled by the CPU. This ensures accurate warp feeding and maintains a constant tension on the warp yarn. With the use of microcomputer technology and other electronic techniques for controlling the machine's movements, especially for automatic monitoring of product quality, the production efficiency of the jet loom has been greatly improved.

In the case of a jet loom (taking the Tsudakoma ZA205i model as an example), the electronic warp feeding mechanism collects tension information from the S-type load sensor on the tension back beam. The warp yarn passes around the tension back beam, and the back beam swings (offsets), transferring the load to the tension sensor on the back beam. After converting into an electrical signal, it is inputted into the warp feeding control system for displaying the warp yarn tension and controlling the amount of warp feeding by the warp feeding motor, so as to make the warp yarn tension approach the set value.

GSL301 S beam load cell. Elastic material: Hard aluminum alloy 2024 with surface anodization treatment; High precision, stability, and reliability; Can be used in both tension and compression, easy to install; Suitable for tension measurement in jet weaving machines.