User Manual for Güde MIG 155/4/A and MIG 170 Welding Machine

Quick guide from the manual

This manual provides essential instructions for operating the Güde MIG 155/4/A and MIG 170 welding machines. Before use, ensure you have the correct protective equipment and that the workspace is well-ventilated. The machine requires a 230V power supply and proper grounding. Always ensure the gas cylinder is securely fastened and the pressure regulator is functioning correctly.

Safety precautions

• Protective Gear: Always wear fireproof welding gloves, a welding apron, long-sleeved natural fiber clothing, long pants, and closed shoes. Use a welding helmet to protect your eyes and face from arc radiation.
• Eye Protection: Use safety glasses with side shields, especially when removing slag.
• Ventilation: Ensure the workspace is well-ventilated to avoid inhaling harmful gases produced during welding.
• Electrical Safety: Connect the machine only to a properly grounded outlet. Ensure the power cable is in good condition.
• Fire Safety: Do not weld on flammable surfaces or near flammable materials.
• Gas Safety: Protect gas cylinders from direct sunlight, heat sources, and temperature fluctuations. Secure them with the provided chain and strap.

Installation

Electrical Connections: The machine operates on 230V. If an extension cable is required, ensure it matches the specifications of the machine (3 x 1.5 mm²).

Grounding: Connect the ground cable securely to the workpiece. Ensure the contact point is clean, free of grease, rust, and dirt for optimal welding results.

Gas Connection: Place the gas cylinder on the rear platform and secure it. Check all gas connections for leaks.

Operation

Control Panel: The machine features an ON-OFF switch, a wire feed speed knob, and switches for current settings.

Wire Feed Adjustment: Adjust the wire feed speed using the knob on the front panel. Ensure the speed corresponds to the selected welding current to maintain a stable arc.

Thermal Protection: The machine is equipped with thermal protection. If the machine overheats, the current flow is automatically interrupted, and a yellow warning light illuminates. Wait for the machine to cool down before resuming work.

Welding Setup

Wire Spool Installation: The machines support 0.2 kg, 1 kg, and 5 kg spools. Use the provided spacer for 5 kg spools.

Wire Threading: Ensure the drive roller groove matches the wire diameter (0.6 mm or 0.8 mm). Cut the first 10 cm of the wire straight, insert it into the guide, and adjust the pressure arm to ensure smooth feeding without excessive tension.

Troubleshooting

If you encounter issues, check the following:

• Wire not feeding: Check for dirt on the contact tip, ensure the clutch is not too tight, and inspect the hose for damage.
• Arc extinguished: Ensure the ground clamp has a good connection to the workpiece and clean the contact tip.
• Porosity: Check gas flow (approx. 8 L/min), clean the workpiece, and ensure the torch is angled correctly.
• Overheating: The thermal protection has triggered. Allow the machine to cool for 20-30 minutes.