Common Fault Analysis:
1. Magnetic Blowing:
When magnetic deflection becomes severe, repositioning the grounding wire connection to the opposite side of the magnetic force direction can help alleviate the issue. This adjustment can significantly reduce the adverse effects caused by magnetic interference.
2. Difficulty Starting the Arc:
(a) Improper polarity: Alkaline electrodes require reverse polarity to prevent issues like electrode sticking or arc interruption.
(b) Mismatched welding current: Ensure the current aligns with the recommended range for your welding rod.
(c) Surface contamination: Oily surfaces can hinder arc stability.
(d) Poor grounding wire connection: Ensure a solid connection to avoid disruptions.
(e) If none of the above applies, measure the no-load voltage at the welding machine's output terminals.
(f) Remote control mode activated without the corresponding remote control box installed.
3. Low No-Load Voltage:
(a) Circuit board failure: A damaged trigger circuit board may lead to insufficient voltage.
(b) Main circuit issues: Phase loss or incorrect phase sequencing can result in low voltage.
(c) Thyristor damage: A faulty thyristor can also cause this problem.
(d) Poor contact in AC contacts: Inadequate suction or engagement can lead to voltage drops.
4. Arc Instability:
(a) Welding rod condition: Rusty or damp rods can destabilize the arc.
(b) Faulty thyristor: Any malfunction in the thyristor could disrupt the arc.
(c) Excessive thrust current: High thrust settings might interfere with arc stability.
5. Current Offset:
(a) PCB malfunction: Issues with the printed circuit board can affect current regulation.
(b) Faulty current potentiometer: Malfunctioning components can cause inaccuracies in current setting.
(c) Incorrect switch position: Misaligned far/near switches can lead to improper current flow.
6. No No-Load Voltage Upon Power-Up:
PCB malfunction: A defective PCB can prevent the generation of no-load voltage.
7. Air Switch Trips After Activation:
Check the resistance at the output end to identify potential problems such as main circuit faults, fan blockages, or thyristor module damage.
These troubleshooting steps provide a comprehensive guide to diagnosing common welding issues. Each step addresses specific problems that can arise during the welding process, helping users maintain optimal performance and efficiency. Regular maintenance and careful attention to detail are essential to preventing these issues from occurring.
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