Why is the stud welder unable to arc weld?

The stud welder is a commonly used arc welding equipment, but sometimes it does not arc during use. This is due to a variety of reasons. The following will analyze the situation of Sorry Arc from the following aspects and propose solutions.

1. The current value displayed by the meter is zero or too small

When the electric meter shows zero current or the current value is too small, the stud welder will have difficulty generating enough current to start arc welding. At this time, you should check whether the power supply is normal, whether the power line is connected correctly, whether the current regulator is turned on, etc.

Solution:

① Check whether the ground wire is firmly connected to the workpiece or the welding ground surface;

② Check whether the current setting on the front panel of the welding machine meets the requirements;

③ Check the input voltage. If the input voltage is too low, the welding machine will not arc.

2. Poor contact or damage to electrodes

Poor electrode contact or damaged electrodes can also cause the welder to not arc. At this time, you should check whether the electrode is installed correctly and whether the electrode head is worn or cracked.

Solution:

① Check whether the electrode is correctly installed and clamped;

② Check whether the electrode is damaged or worn;

③Replace the electrode;

④ Clean the stains and oxides at the connection between the electrode and the clamp to ensure good contact performance.

3. The surface of the welded parts is defective

Problems such as oil stains, rust, and oxidation on the surface of the welded parts before welding can also cause arc failure. Therefore, the surface of the welded parts should be cleaned and treated to keep it clean, smooth and free of rust spots.

Solution:

① Clean the oil, dirt and rust residue on the surface of the welded parts;

② Polish the surface of the welded parts to eliminate rust, oxide layers and other surface defects;

③ Check whether the welding gun nozzle is loose or damaged and replace it in time.

4. Other components of the welding machine malfunction

Failure of other components of the welding machine, such as potentiometers, ground insulation, trim switches, etc. will also cause arc failure.

Solution:

① Check whether all components inside the welding machine are operating normally, including transfer switches, potentiometers, transformers, capacitors, etc.;

② Check whether there is any problem with the ground insulation, and replace worn ground insulation parts in time;

③ Check whether the trim switch is damaged or malfunctioning, and replace it in time.

In short, there are many reasons why the stud welder does not arc. Only by carefully checking the working status of each component can we accurately find the root cause of the problem and take targeted solutions.