The initial welding resistance controller of the intermediate frequency spot welding machine was controlled by the electronic tube, and it became a transistor after decades, but it was still cumbersome and inconvenient, with the advancement of technology. Microcomputer controllers have appeared in the past decade, that is, CPU-centric controllers.
The spot welding machine resistance welding machine controller is to control, monitor and inspect the welding process. In order to meet the needs of the market, according to the continuous improvement of automobile manufacturing and welding process requirements of automobile manufacturers. A new generation of controller has been developed. This controller has multiple pulse triggers, multiple welding specifications, multiple startup methods, and multiple on-site data monitoring. At the same time, it has the characteristics of accurate control time, small welding error and stable work. Ideal resistance spot welding machine control equipment.
In addition, according to the requirements of the welding process, some other functions can be added to the controller of the intermediate frequency spot welder. For example, when spot welding or projection welding of some special metals, it is hoped that there are preheating, welding, and tempering in the welding cycle. Pulses, so a modulator that adjusts pulses such as preheating, welding, and tempering is required; in order to prevent splashing at the beginning of welding, the welding pulse also has a current increase control to gradually increase the welding current from a small value to the command value; Some welding machines also have automatic network pressure compensation devices or various types of closed-loop control to ensure stable output heat or stable welding nugget quality. When several welding machines are used at the same time, interlocking control or group control can also be performed, if necessary It can realize that only one spot welder is powered on at the same time, avoiding that the simultaneous welding will reduce the net pressure too much and affect the welding quality.