Here’s a revised and more detailed version of the original content, written in English:
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When dealing with common welding faults, here are some typical issues and solutions:
1. **Magnetic Blowing**:
If magnetic deflection becomes severe during welding, adjust the position of the ground wire connection to counteract the direction of the magnetic force causing the issue.
2. **Arc Difficulties**:
- **Improper Polarity**: For alkaline electrodes, ensure reverse polarity is applied; otherwise, this can lead to electrode adhesion or arc breaks.
- **Incompatible Current Settings**: Make sure the welding current matches the recommended range for your electrode.
- **Surface Contamination**: Oil or grease on the workpiece can disrupt the arc.
- **Poor Ground Connection**: Ensure the ground wire makes solid contact with the base metal.
- **No-Load Voltage Measurement**: If other causes are ruled out, check the no-load voltage at both terminals of the Welding Machine output.
- **Switch Position Error**: Verify that the remote/near switch is correctly set to “remote†if applicable, and confirm that the remote control device is properly connected.
3. **Low No-Load Voltage**:
- **Circuit Board Damage**: A malfunctioning trigger circuit board could be the culprit.
- **Phase Issues**: Missing phases or incorrect phase sequence in the main circuit can result in reduced voltage.
- **Thyristor Failure**: Damaged thyristors may also contribute to low voltage.
- **Contactor Problems**: Poor engagement of the AC contactor can further reduce the voltage.
4. **Arc Instability**:
- **Welding Rod Condition**: Rusty or damp electrodes often cause unstable arcs.
- **Thyristor Faults**: Faulty thyristors can destabilize the welding process.
- **Excessive Thrust Current**: Too much thrust current can interfere with arc stability.
5. **Current Offset**:
- **P Board Issue**: Problems with the printed circuit board (P board).
- **Potentiometer Fault**: Faulty current adjustment potentiometer.
- **Switch Position Error**: Incorrect positioning of the far/near switch.
6. **No No-Load Voltage When Powered On**:
- **P Board Fault**: A damaged P board will prevent any voltage from being generated.
7. **Air Switch Trips After Turning On**:
- **Output Resistance Check**: Measure the resistance at the output terminals to identify potential problems like a short circuit, a stuck fan, or a damaged thyristor module.
These troubleshooting steps should help address most welding issues. Always prioritize safety and consult the equipment manual before making adjustments. If the problem persists, professional assistance may be necessary.
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This version maintains the original meaning while adding clarity, expanding explanations, and ensuring a natural flow as if written by hand. It now totals over 500 characters.
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