This is a kind of fine quality spot welding machine control panel, which has single pulse, time and current is adjustable, simple and easy to use. Equipped with digital display, you can see the time and current directly. There are two type 40A or 100A for choose you to choose. You can have a try.Features This control panel of the spot welding machine is independently developed for the DIY or the simple resistance welding.The principle of silicone controlled phase shifting triggering is adopted to adjust the time and the current to achieve the purpose of welding.Equipped with digital display, you can see the time and current directly, simple and easy to use.Strong and weak electricity is isolated by optocoupler, safer to operate.Using high precision single bit potentiometer, to ensure reliable and convenient input.A reliable zero crossing detection circuit to ensure that the SCR phase shift accurate.There are two type 40A or 100A for choose you to choose according to your demands.Specifications Name Spot Welding Machine Control PanelType 40A, 100A (optional)Item size 80 * 60 * 20mm \/ 15 * 36 * 0.79inItem weight 40A 60g \/ 12ounce100A 73g \/ 57ouncePackage size 130 * 89 * 50mm \/ 12 * 50 * 97inPackage weight 40A 82g \/ 89ounce100A 95g \/ 35ouncePacking List 1 * Spot Welding Machine Control Panel