1. Introduction
Thank you for choosing the JASIC NB-250 (N214) IGBT All-in-one Inverter CO2 Shielded Welder. This machine is designed for versatile welding applications, offering Gas Shielded Welding (MIG/MAG), Manual Arc Welding (MMA), and Arc Argon Welding (TIG) capabilities. Featuring advanced IGBT technology, it provides stable performance, intelligent control, and efficient operation. This manual provides essential information for the safe and effective use, setup, operation, and maintenance of your welding machine.
Figure 1: Front view of the JASIC NB-250 welding machine.
2. Safety Precautions
Welding operations involve inherent risks. Always adhere to the following safety guidelines to prevent injury or damage:
- Electric Shock: Welding current can cause fatal electric shock. Ensure proper grounding, inspect cables for damage, and wear dry gloves.
- Fumes and Gases: Welding fumes and gases can be hazardous to health. Work in a well-ventilated area or use local exhaust ventilation.
- Arc Rays: Arc rays can burn eyes and skin. Always wear a welding helmet with appropriate shade lenses and protective clothing.
- Fire and Explosion: Sparks and hot metal can cause fires. Keep flammable materials away from the welding area.
- Hot Parts: Welder components and workpieces can become extremely hot. Allow them to cool before handling.
- Moving Parts: Keep hands and body clear of moving parts like the wire feeder.
- Maintenance: Disconnect power before performing any maintenance or service.
3. Included Components
The JASIC NB-250 (N214) welding machine typically includes the following components:
- JASIC NB-250 (N214) Welding Machine Unit
- MIG Welding Gun (3 meters, with European interface and Panasonic gun head)
- Ground Wire with Clamp
- Gas Meter Pressure Reducer
Figure 2: NB-250 welding machine and standard accessories.
4. Specifications
The following table outlines the key technical parameters of the JASIC NB-250 (N214) welding machine:
| Category | Parameter | Value |
|---|---|---|
| Input | Input Voltage (V) | Single phase AC220±15% |
| Rated Input Capacity (kVA) | 7.7 | |
| Power Factor | 0.75 | |
| Rated No-Load Voltage (V) | 56 | |
| Gas Shielded Welding (MIG/MAG) | Welding Current (A) | 50~200 |
| Welding Voltage (V) | 13~26 | |
| Gas Meter Heater Voltage (V) | 36 (AC) | |
| Wire Feeding Speed Range (m/min) | 2.5~24 | |
| Rubbing Arc Argon Welding (TIG) | Welding Current (A) | 50~200 |
| Arc Ignition Method | Contact arc ignition | |
| Manual Welding (MMA) | Welding Current (A) | 50~160 |
| Other | Rated Load Duration Rate @ 40 °C | 30% |
| Efficiency | 81% | |
| Protection Grade | IP21S | |
| Insulation Level | H | |
| Dimensions (mm) | 597*298*503 | |
| Weight (kg) | 22.6 |
Figure 3: Product parameters table.
5. Setup Instructions
Before operating the welding machine, ensure it is properly set up according to these steps:
- Unpacking and Inspection: Carefully unpack all components and inspect for any shipping damage.
- Power Connection: Connect the welding machine to a single-phase AC220V power supply. Ensure the power source meets the machine's requirements.
- Ground Wire Connection: Securely attach the ground clamp to the workpiece or a clean, bare metal area of the welding table to ensure proper grounding.
- MIG Welding Gun Connection: Connect the MIG welding gun to the appropriate European interface on the front panel of the machine.
- Gas Cylinder and Regulator Setup:
- Attach the gas meter pressure reducer to your CO2 or mixed gas cylinder.
- Connect the gas hose from the regulator to the gas inlet on the rear of the welding machine.
- Ensure all connections are tight to prevent gas leaks.
- Wire Spool Installation: Open the wire feeder compartment (typically on the side, see Figure 5) and install the appropriate welding wire spool. Thread the wire through the feeder mechanism and into the MIG gun liner.
- Initial Settings: Turn on the machine and set initial welding parameters (current, voltage, wire feed speed) based on your material and wire type. Refer to the control panel (Figure 4) for adjustments.
Figure 4: Side view showing wire feeder compartment.
Figure 5: Rear view showing power input and gas connection.
6. Operation
The JASIC NB-250 (N214) offers multiple welding modes and intelligent features for optimal performance.
6.1 Welding Modes
- Gas Shielded Welding (MIG/MAG): Ideal for various metals, offering fast and efficient welding with a protective gas shield.
- Manual Welding (MMA): For stick electrode welding, suitable for outdoor use and thicker materials.
- Arc Argon Welding (TIG): Provides precise welding for thin materials and high-quality finishes.
6.2 Key Features and Functions
- BIM-TECH Blade Module Patent Technology: Ensures better performance and module quality.
- Unified Regulation: Automatically matches welding voltage according to the required welding current.
- Fast Wire Feeding: Enables efficient and quick welding.
- DUST-FREE Sealed Air Duct: Isolates dust and efficiently dissipates heat, extending component life.
- Intelligent Gas Saving: Self-controlled gas flow system saves 10-20% on gas costs.
- Intelligent Fan: Energy-saving and noise reduction, reduces dust entry, and extends fan life.
- Wire Inspection/Gas Inspection: Built-in functions for checking wire and gas supply.
- Step 2/Step 4 Function: Provides flexibility in trigger control for welding operations.
Figure 6: Control panel for setting welding parameters.
Figure 7: Gas shielded welding in action.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your welding machine.
- Daily Cleaning: Clean the welding gun nozzle, contact tip, and gas diffuser daily to remove spatter.
- Periodic Inspection: Regularly inspect all cables, connections, and hoses for wear, cuts, or damage. Replace any damaged parts immediately.
- Dust Removal: Use compressed air to blow out dust from inside the machine, especially from cooling vents, at regular intervals (e.g., monthly or as needed based on usage environment). Ensure power is disconnected before doing so.
- Wire Feeder Maintenance: Clean the wire feeder rollers and guide tubes to ensure smooth wire feeding.
- Storage: Store the welding machine in a clean, dry environment, away from excessive dust, moisture, and corrosive substances.
8. Troubleshooting
This section provides solutions to common issues you might encounter. For problems not listed here, contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to machine | Power cable disconnected, circuit breaker tripped, faulty power switch | Check power cable, reset circuit breaker, inspect power switch |
| No arc ignition | Poor ground connection, incorrect settings, faulty torch/electrode | Ensure good ground, verify welding parameters, check torch/electrode condition |
| Wire feeding issues | Wire tangled, wrong roller size, clogged liner, worn contact tip | Untangle wire, use correct rollers, clean liner, replace contact tip |
| Poor weld quality | Incorrect settings, insufficient gas flow, contaminated workpiece | Adjust parameters, check gas supply/flow, clean workpiece thoroughly |
| Overheating indicator on | Exceeded duty cycle, blocked ventilation | Allow machine to cool, ensure clear ventilation paths |
9. User Tips
- Practice Makes Perfect: If you are new to welding, start with scrap materials to get a feel for the machine and different welding techniques before working on critical projects.
- Read the Manual: Always refer to this manual for specific settings and procedures for different welding modes and materials.
- Proper Ventilation: Always ensure adequate ventilation to disperse welding fumes, protecting your respiratory health.
10. Warranty & Support
10.1 Warranty Information
The JASIC NB-250 (N214) welding machine comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. Please retain your proof of purchase for warranty claims.
10.2 Customer Support
For any questions regarding product operation, troubleshooting, or warranty claims, please contact our customer support team:
- Phone: +86 17673255286
- WhatsApp: +86 18175135256
- WeChat: 17673255286
- Email: 2862417451@qq.com
