1. Introduction
This manual provides essential information for the safe and efficient operation, setup, maintenance, and troubleshooting of your Jasic MIG 350 Compact Inverter welding machine. Please read this manual thoroughly before operating the equipment to ensure proper usage and to prevent injury or damage.
2. Safety Instructions
Welding operations involve inherent risks. Adhere to all safety precautions to prevent electric shock, fire, burns, and other hazards.
- Electric Shock: Always ensure the machine is properly grounded. Do not touch live electrical parts. Wear dry welding gloves.
- Fumes and Gases: Ensure adequate ventilation. Welding fumes can be hazardous to health.
- Arc Rays: Protect your eyes and skin from arc rays using appropriate welding helmets and protective clothing.
- Fire and Explosion: Keep flammable materials away from the welding area. Hot metal and sparks can cause fires.
- Burns: Hot metal and equipment can cause severe burns. Wear protective clothing and gloves.
- Cylinders: Handle gas cylinders with care. Secure them to prevent falling.
3. Product Overview
The Jasic MIG 350 Compact Inverter is a versatile welding machine designed for MIG/MAG, MMA (Stick), and Lift TIG welding processes. It features advanced inverter technology for stable arc performance and precise control.
Figure 1: Jasic MIG 350 Compact Inverter welding machine. This image displays the orange and black welding unit on a wheeled trolley, featuring the control panel with digital displays and adjustment knobs, and connections for welding cables and gas.
3.1 Control Panel Features
- Digital Displays (V & A): Show real-time voltage and amperage settings.
- VRD U=24V Indicator: Indicates when Voltage Reduction Device (VRD) is active, reducing open-circuit voltage for increased safety.
- Mode Selector: Allows selection between MIG, MMA (Manual Metal Arc), TIG (Tungsten Inert Gas), and SPOOL GUN welding processes.
- Wire Feed Speed (m/min) Control: Adjusts the speed at which the welding wire is fed.
- Inductance/Arc Force (Hard/Soft) Control: Adjusts arc characteristics for MIG (inductance) or MMA (arc force) to fine-tune arc stability and penetration.
- Voltage/Amperage Adjustment: Main controls for setting welding parameters.
- Standard/Synergic Control: For MIG welding, this may switch between manual and synergic settings, where the machine automatically adjusts parameters based on wire feed speed.
4. Setup
4.1 Unpacking and Placement
- Carefully remove the welding machine and all accessories from the packaging.
- Inspect for any shipping damage. Report any damage to your supplier immediately.
- Place the machine on a stable, level surface, ensuring adequate ventilation around the unit. Do not block air vents.
4.2 Power Connection
Connect the machine to a suitable power supply. The Jasic MIG 350 typically requires a 3-phase 400V AC supply. Ensure the power outlet is properly grounded and rated for the machine's input current.
4.3 Gas Connection (for MIG/TIG)
- Securely attach the gas regulator to the appropriate shielding gas cylinder (e.g., Argon for TIG, Argon/CO2 mix for MIG).
- Connect the gas hose from the regulator to the gas inlet connection on the rear of the welding machine.
- Open the cylinder valve slowly and adjust the gas flow rate on the regulator to the recommended setting for your welding process.
4.4 Wire Feed Unit Setup (for MIG)
- Open the wire feed compartment.
- Mount the welding wire spool onto the spindle, ensuring it rotates freely.
- Thread the wire through the guide tube and into the drive rollers. Ensure the drive rollers match the wire diameter.
- Close the drive roller tension arm and adjust the tension. It should be tight enough to feed the wire without slipping, but not so tight as to deform the wire.
- Feed the wire through the MIG torch liner until it emerges from the contact tip.
5. Operating Instructions
5.1 Basic Operation Steps
- Ensure all connections (power, gas, torch, earth clamp) are secure.
- Turn on the main power switch on the machine.
- Select the desired welding process (MIG, MMA, TIG) using the mode selector.
- Adjust the welding parameters (Voltage, Amperage, Wire Feed Speed, Inductance/Arc Force) according to the material thickness and welding wire/electrode type. Refer to welding charts for recommended settings.
- Attach the earth clamp securely to the workpiece.
- Put on all necessary personal protective equipment (welding helmet, gloves, protective clothing).
- Initiate the arc and begin welding.
- After welding, turn off the machine and disconnect power.
5.2 Process-Specific Notes
- MIG/MAG Welding: Maintain a consistent stick-out and travel speed. Ensure proper gas flow.
- MMA (Stick) Welding: Select the appropriate electrode type and diameter. Adjust arc force for better penetration or smoother arc.
- Lift TIG Welding: Use a non-consumable tungsten electrode. Ensure proper gas flow. Initiate arc by touching the tungsten to the workpiece and lifting slightly.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your welding machine.
- Daily: Clean the welding torch nozzle and contact tip. Check for loose connections.
- Weekly: Inspect welding cables for damage. Clean the wire feed rollers and liner. Check gas hose for leaks.
- Monthly: Blow out dust and debris from the machine's interior using dry, compressed air. Ensure power is disconnected before opening the casing. Inspect cooling fan for proper operation.
- Consumables: Replace contact tips, nozzles, and drive rollers as they wear out.
7. Troubleshooting
Refer to the following table for common issues and their potential solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to machine | Power cable disconnected, circuit breaker tripped, machine switch off | Check power connections, reset breaker, turn on machine switch |
| No arc | Poor earth connection, incorrect settings, faulty torch/electrode holder | Ensure good earth contact, verify settings, inspect torch/holder |
| Wire feed issues (MIG) | Incorrect drive roller tension, clogged liner, wrong drive roller size, worn contact tip | Adjust tension, clean/replace liner, use correct rollers, replace contact tip |
| Poor weld quality | Incorrect parameters, insufficient gas shielding, contaminated workpiece | Adjust voltage/amperage/wire speed, check gas flow, clean workpiece |
If problems persist, contact qualified service personnel.
8. Specifications
The following are typical specifications for the Jasic MIG 350 Compact Inverter. Specific values may vary slightly.
- Manufacturer: Jasic
- Model: MIG 350 Compact Inverter
- Input Voltage: 3-Phase 400V AC (±15%)
- Input Power: 18.5 kVA
- Output Current Range (MIG): 50 - 350 A
- Output Current Range (MMA): 20 - 350 A
- Output Current Range (TIG): 10 - 350 A
- Duty Cycle (40°C): 350A @ 60%
- Wire Diameter Range: 0.8mm - 1.2mm
- Protection Class: IP21S
- Insulation Class: F
- Weight: Approximately 50 kg
- ASIN: B07XVN972R
- Date First Available: 19 Oct. 2020
9. Warranty and Support
The Jasic MIG 350 Compact Inverter is covered by a manufacturer's warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the warranty card included with your product or contact your authorized Jasic dealer.
For technical support, service, or spare parts, please contact your local Jasic distributor or the point of purchase. Provide your machine's model and serial number when seeking assistance.
