120 Manual - Cem Dual Mig

Hold the torch at a 90-degree angle to the joint, then tilt it roughly 10 to 15 degrees in the direction of travel. Push vs. Pull:

Setting 2 + Max: Maximum power output (ideal for thicker steel plate).

Heavy-duty 3-core cable with grounded plug.

The is an indispensable resource for safe, effective, and long-lasting welding performance. Whether you are a beginner learning to set gasless polarity or an experienced welder fine-tuning wire feed for bodywork, the manual provides the exact parameters and safety protocols needed. If your copy is missing, prioritize finding an official or equivalent guide before using the machine—especially for dual-voltage or dual-gas functions where incorrect setup can destroy internal components or create hazardous arc conditions. cem dual mig 120 manual

Operating the machine successfully requires a clear understanding of the front panel interfaces. While layout configurations vary slightly across production years, the primary controls remain identical.

Unplug the machine, remove the outer metal shroud, and use dry low-pressure compressed air to blow out dust accumulated on the internal transformer, cooling fan, and circuit board. 8. Troubleshooting Guide Probable Cause Corrective Action Machine turns on, but wire will not feed. Too little drive roll tension. Tighten the pressure arm tension screw slightly. Incorrect drive roll groove size. Flip or replace the drive roller to match wire size. Wire fused to contact tip. Cut the wire, replace the damaged contact tip. Porosity (holes/bubbles in the weld bead). Lack of shielding gas coverage. Check gas cylinder level, regulator flow rate, and hoses. Welding in a windy environment. Use a wind shield or switch to flux-cored wire. Base metal is dirty. Grind or brush the metal down to shiny, clean steel. Excessive spatter during welding. Wrong wire feed speed or voltage. Fine-tune the wire speed dial; adjust voltage settings. Incorrect polarity configuration. Check terminal connections for gas vs. gasless setup. Excessive torch stick-out. Move the torch closer to the metal workpiece. Arc stutters or cuts out repeatedly. Poor electrical ground connection.

Torch is POSITIVE (+), Ground Clamp is NEGATIVE (-). Hold the torch at a 90-degree angle to

Read entire manual before use. Welding produces intense UV light, heat, sparks, and fumes.

For on-site repairs of fences, gates, or farm equipment (using flux-cored wire), the durability and simple controls make it a great field tool.

Use a shielding gas (e.g., Argon/CO2 mix) and connect the regulator to the bottle. 4. How to Use the CEM MIG 120 Controls Heavy-duty 3-core cable with grounded plug

Setting 4 (Max/2): Highest voltage for maximum penetration on thicker steel.

E71T-GS or E71T-11 Flux-Cored wire (0.8mm or 0.9mm).

| Parameter | Value | |-----------|-------| | Input Voltage | 110V/230V ±10%, 50/60Hz (auto-sensing) | | Rated Duty Cycle | 60% @ 120A (230V), 20% @ 80A (110V) | | Welding Current Range | 30A – 120A | | Wire Diameter Capability | 0.6 mm – 0.9 mm (solid/flux-cored) | | Spool Capacity | 1 kg (2.2 lb) spool | | No-load Voltage | ~32V | | Protection Class | IP21S (indoor use only) | | Dimensions (L×W×H) | 380 × 180 × 290 mm (approx.) | | Weight | 8.5 kg (18.7 lb) |

Maintain a distance of 1/4" to 1/2" between the contact tip and the metal workpiece. An excessive stick-out weakens electrical current and destabilizes the arc. 7. Maintenance and Care