this machine adopts electronic synchironous control technique, both welding time and separate control welding is composed of digital and integrated electric circuit. this operation is accurate, it has stable function, firm welded point, without welding tracks. not only welding speed is fast, but also it is easy to learn and operate. the machine is equipped with precise equipment for weft cutting (won naton patent zl02208722.2) and positioning (won nation patent zl02208721.4), so the length of the wefts is identical and regular, it is unnecessary to slice the side. drawing mesh system adopts elastic tension link that met nation patent zl200520024380.9 and opening mesh, it is easy to regulate mesh hole, and mesh opening size is rather accurate, welding aperture could adjust randomly within range.