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１ 控制系统存在的问题 ＤＮＪ—１２型节能点焊机常用于点焊钢丝、薄板等小型焊件。其一次线圈不经常带电，节能效果好，且重量轻，体积小，移动方便，因此应用广泛。但在使用中发现控制系统存在下列问题： ①点焊机上的延时线路采用的是分立元件，且元件正面全部用树脂灌封
1 control system problems DNJ-12 energy-saving spot welder is commonly used in spot welding wire, sheet and other small weldments. The coil is not often charged, energy-saving effect is good, and light weight, small size, easy to move, so widely used. However, the use of the control system found the following problems: ① spot welding delay line is used in discrete components, and the front of the components are all resin potting