JASIC MIG Welding Machine NB-315F(N254II) User Manual

1. Introduction

Thank you for choosing the JASIC NB-315F(N254II) MIG Welding Machine. This industrial-grade inverter welding machine is designed for versatile welding applications, including MIG Gas Protected Welding, Friction Argon Arc Welding (TIG), and Manual Welding (MMA). This manual provides essential information for the safe and efficient setup, operation, and maintenance of your welding machine. Please read it thoroughly before use.

2. Package Contents

Upon unpacking, please verify that all standard accessories are included:

• 5-meter comprehensive line (1 unit)
• WF-21 Wire feeder (1 unit)
• 3-meter Welding Torch (1 unit)
• Carbon dioxide gas meter (1 unit)
• Ground wire (1 unit)
• User Manual (1 copy)

If any items are missing or damaged, please contact your supplier immediately.

3. Setup Instructions

Follow these steps to set up your welding machine:

1. Power Connection: Connect the welding machine to a three-phase AC380V ± 15% power supply. Ensure the power source meets the machine's requirements to prevent damage.
2. Wire Feeder Connection: Connect the WF-21 Wire Feeder to the main welding machine using the provided comprehensive line. Ensure all connections are secure.
3. Gas Connection: For MIG Gas Protected Welding, connect the carbon dioxide gas meter to your gas cylinder and then to the welding machine's gas inlet. Ensure all gas connections are tight to prevent leaks.
4. Welding Torch Connection: Attach the 3-meter Welding Torch to the appropriate connector on the machine.
5. Ground Wire Connection: Securely connect the ground wire and clamp to the workpiece or welding table. Ensure good electrical contact.

4. Operating Instructions

The NB-315F(N254II) offers multiple welding modes. Familiarize yourself with the control panel:

4.1. Control Panel Overview

• Digital Display: Shows welding current (A) and welding voltage (V).
• Welding Method Selection: Buttons or switches to select between MIG Gas Protected, Friction Argon Arc (TIG), and Manual Welding (MMA).
• Adjustment Knobs: Used to fine-tune welding current, voltage, and wire feeding speed depending on the selected mode.

4.2. Welding Modes

1. MIG Gas Protected Welding:
   • Welding Current: 60-315 A
   • Welding Voltage: 14-34 V
   • Wire Feeding Speed: 2-24 m/min
   • Gas Meter Heater Voltage: 36 V (ensure proper gas flow and heating for optimal performance)
2. Friction Argon Arc Welding (TIG):
   • Welding Current: 50-315 A
   • Arc Ignition Method: Contact arc ignition
3. Manual Welding (MMA):
   • Welding Current: 50-270 A

4.3. Basic Operation Steps

1. Select Welding Method: Choose the appropriate welding mode (MIG, TIG, or MMA) using the control panel.
2. Adjust Parameters: Set the welding current, voltage, and wire feeding speed (for MIG) according to the material thickness and type.
3. Prepare Workpiece: Ensure the workpiece is clean and properly grounded.
4. Begin Welding: Initiate the arc and perform welding as required.
5. Monitor Performance: Observe the weld pool and adjust parameters as needed for optimal results.

5. Maintenance

Regular maintenance ensures the longevity and optimal performance of your welding machine:

• Cleaning: Keep the machine clean and free from dust and debris. Use compressed air to clean internal components periodically, ensuring the machine is unplugged.
• Cable Inspection: Regularly inspect all cables (power, welding, ground) for cuts, fraying, or loose connections. Replace damaged cables immediately.
• Torch and Consumables: Inspect the welding torch, nozzles, contact tips, and electrodes regularly. Replace worn-out consumables to maintain weld quality.
• Gas System: Check gas lines and connections for leaks. Ensure the gas meter is functioning correctly.
• Storage: Store the machine in a dry, clean environment when not in use.

6. Troubleshooting

Here are some common issues and potential solutions:

• Machine Does Not Power On:
  • Check the power supply connection and ensure it is securely plugged in.
  • Verify that the input voltage matches the machine's requirement (Three phase AC380V ± 15%).
  • Check the circuit breaker or fuse.
• No Arc or Poor Arc Ignition:
  • Ensure the ground clamp has good contact with the workpiece.
  • Check welding cables for damage or loose connections.
  • For MIG, check wire feed and contact tip. For TIG, check tungsten electrode. For MMA, ensure electrode is dry and correctly sized.
• Poor Weld Quality:
  • Adjust welding current, voltage, and wire speed (for MIG) according to the material type and thickness.
  • Ensure proper gas flow (for MIG/TIG) and correct gas type.
  • Check for contaminated workpiece or worn consumables.
• Overheating Indication:
  • The machine has a rated load duration rate of 30% at 40°C. Allow the machine to cool down if the overheating indicator activates.
  • Ensure adequate ventilation around the machine.

7. Specifications

Detailed technical parameters for the JASIC NB-315F(N254II) welding machine:

8. Warranty and Support

The JASIC NB-315F(N254II) welding machine comes with a 1-year warranty from the date of purchase. For technical assistance, troubleshooting, or warranty claims, please contact your seller or JASIC customer support. Online support is available.

9. User Tips

• Match Settings to Material: Always ensure your welding parameters (current, voltage, wire speed) are correctly matched to the material type and thickness you are working with for optimal weld quality and to prevent damage to the workpiece or machine.
• Professional Guidance: For complex welding tasks or if you are new to welding, consider seeking guidance from professional welders or certified training programs.
• Voltage Compatibility: If you need to operate the machine in a region with different voltage standards, confirm with the supplier that the machine can be configured for your local voltage and frequency (e.g., 220V/380V/415V/440V/480V 3-Phase).