1. Product Overview
The INFRA SoldarMI 2 350 CA/CD is a robust and versatile welding machine designed for a wide range of industrial and technical applications. This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your welding equipment.
Figure 1: INFRA SoldarMI 2 350 CA/CD Welding Machine. This image shows the main unit with its blue casing, control panel, and wheels for portability.
2. Key Features and Advantages
- Continuous Current Adjustment: Allows precise output current adjustment to meet specific welding needs.
- Forced Ventilation Cooling System: Ensures the machine operates at an optimal temperature, extending its service life.
- Integrated Line Switch: For convenient power control.
- Handle and Wheels: Pre-installed for easy transport and maneuverability.
- Dual CA/CD Current Ranges: Ideal for applying all types of electrodes, including E6010 and E7018, even in out-of-position welds.
- Excellent Arc Stability: Provides consistent and reliable welding performance.
- 110V AC Power Outlets: Equipped with outlets for powering electrical tools.
- Power Supply: 220/440 Volts, 84/42 Amps, Single Phase, 60 Hertz.
- Nominal Output: 250 Amps @ 30 Volts CA/CD at 50% duty cycle.
- Continuous Output: 175 Amps @ 27 Volts CA/CD at 100% duty cycle.
3. What's Included
The following components are typically included with your INFRA SoldarMI 2 350 CA/CD welding machine:
- User Manual: Includes operation guide, maintenance guide, parts list, and warranty policy.
- HFU 252 High-Frequency Unit (optional, but listed as included in description).
- PAS 250 Welding Cable Set.
- TIG 200 V Torch.
- Cylinder Rack.
4. Setup
Before operating the welding machine, ensure proper setup for safety and optimal performance.
- Placement: Position the welding machine on a stable, level surface in a well-ventilated area. Ensure adequate clearance around the machine for airflow.
- Power Connection: Connect the machine to a compatible 220V or 440V single-phase power supply (84/42 Amps, 60 Hz) using the integrated line switch. Verify the power source matches the machine's requirements.
- Cable Connection: Connect the PAS 250 welding cable set to the appropriate terminals (positive and negative) on the machine. Ensure connections are secure.
- TIG Torch Setup (if applicable): If performing TIG welding, connect the TIG 200 V torch and the HFU 252 high-frequency unit (if using for AC/CD TIG with HF start) according to their respective manuals.
- Cylinder Installation: If using shielding gas, secure the gas cylinder to the provided cylinder rack and connect the gas hose to the machine and torch as required for your welding process.
Figure 2: Side view of the welding machine, highlighting its robust construction and portability features like wheels.
5. Operating Instructions
The INFRA SoldarMI 2 350 CA/CD supports various welding processes:
5.1. Shielded Metal Arc Welding (SMAW) / Stick Welding
This machine is capable of SMAW with electrode diameters from 1.6 mm (1/16") to 6.4 mm (1/4"). It supports common electrodes such as E6010, E6011, E6013, E7018, E7024, and special electrodes for aluminum, cast iron, and stainless steel.
- Current Range:
- Low Range CA: 30 to 150 Amps
- High Range CA: 90 to 300 Amps
- Low Range CD: 25 to 150 Amps
- High Range CD: 85 to 300 Amps
- Procedure: Select the appropriate current range and adjust the continuous current knob for the desired amperage based on the electrode type and material thickness. Ensure proper polarity (CA or CD) is selected.
5.2. Gas Tungsten Arc Welding (GTAW) / TIG Welding
The machine supports TIG welding in both AC and DC modes. For AC/CD TIG, an optional high-frequency unit (HFU 252) is recommended for arc starting and stabilization. The machine can handle up to 200 Amps in AC at a 40% duty cycle for TIG.
- DC TIG: Suitable for stainless steels, alloy steels, nickel alloys, and copper. Features contact start.
- AC/CD TIG with HF: For aluminum welding and high-frequency arc starting.
- Procedure: Connect the TIG torch and gas supply. Select the appropriate current type (AC or DC) and adjust amperage. Use the high-frequency unit for non-contact arc starting if equipped.
5.3. Gas Metal Arc Welding (GMAW) / MIG Welding (Optional)
MIG welding with spray or globular arc is possible with a tubular wire and a voltage-response feeder (e.g., Model S-502-C, optional).
5.4. Carbon Arc Cutting and Beveling (Optional)
The machine can also be used for cutting and beveling with a carbon electrode.
Figure 3: The INFRA SoldarMI 2 350 CA/CD in an industrial setting, illustrating its use in metal fabrication.
6. Maintenance
Regular maintenance ensures the longevity and safe operation of your welding machine.
- Cleaning: Periodically clean the machine's exterior and ventilation openings to prevent dust and debris buildup, which can hinder cooling. Use compressed air to clear internal components if accessible and safe.
- Cable Inspection: Regularly inspect welding cables, torch, and ground clamp for signs of wear, damage, or loose connections. Replace damaged components immediately.
- Fan Check: Ensure the forced ventilation fan is operating correctly and is not obstructed.
- Storage: Store the machine in a dry, clean environment when not in use.
- Professional Service: For internal repairs or complex issues, consult a qualified service technician.
7. Troubleshooting
This section provides general guidance for common issues. For detailed troubleshooting, refer to the specific troubleshooting guide included in your physical user manual.
| Problem | Possible Cause | Solution |
|---|---|---|
| Machine does not power on. | No power supply; tripped circuit breaker; faulty power cord. | Check power connection; reset circuit breaker; inspect power cord for damage. |
| Poor arc stability. | Incorrect current setting; improper electrode; poor ground connection. | Adjust current; use correct electrode for material; ensure good ground connection. |
| Overheating. | Exceeding duty cycle; blocked ventilation. | Allow machine to cool down; clear ventilation openings. |
8. Technical Specifications
- Manufacturer: Infra
- Model: 3632
- Power Input: 220/440 Volts, 84/42 Amps, Single Phase, 60 Hertz
- Max. Open Circuit Voltage (V.C.A.): 75 Volts AC, 64 Volts DC
- Nominal Output (50% Duty Cycle): 250 Amps @ 30 Volts CA/CD
- Continuous Output (100% Duty Cycle): 175 Amps @ 27 Volts CA/CD
- Current Range (CA Low): 30 to 150 Amps
- Current Range (CA High): 90 to 300 Amps
- Current Range (CD Low): 25 to 150 Amps
- Current Range (CD High): 85 to 300 Amps
- Supported Electrode Diameters (SMAW): 1.6 mm (1/16") to 6.4 mm (1/4")
- Package Dimensions: 60 x 30 x 20 cm (approximately 23.6 x 11.8 x 7.9 inches)
- Weight: 5 kg (approximately 11 lbs) (Note: This weight seems unusually low for a welding machine of this capacity. Please verify with product documentation.)
- Batteries Required: No
9. Warranty and Support
Your INFRA SoldarMI 2 350 CA/CD welding machine comes with a warranty policy. Please refer to the "póliza de garantía" (warranty policy) included with your product for detailed terms and conditions regarding coverage, duration, and claims procedures.
For technical support, service, or to inquire about replacement parts, please contact INFRA customer service. Contact information can typically be found on the manufacturer's official website or in the documentation provided with your purchase.
10. Applications
The INFRA SoldarMI 2 350 CA/CD is suitable for a variety of applications, including:
- Fabrication of metallic structures.
- Technical institute training and education.
- Maintenance of railway cars.
- General industrial welding tasks.