Uneven weld spots on a capacitor discharge spot welding machine are caused by localized wear on the welding electrodes or unevenness in the welding mold. Leveling or correcting the electrodes will solve this problem. The main factors to consider when adjusting a spot welding machine are welding current, welding time, and welding gas pressure. Changing any one of these will affect the welding, and conversely, adjusting any one will change the welding effect. Try gradually adjusting the parameters to suit your product; fluctuations up and down will help you adjust the machine correctly.
The principle of a capacitor discharge spot welding machine: The machine should have two sets of thyristors connected in parallel. When a trigger signal is sent to thyristor A, it conducts, resulting in current output. Pressing the pedal again conducts thyristor B, outputting current. The next press activates thyristor A, and this cycle continues.