Rohr MMA-160FI Mode D'emploi page 4

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MMA-160FI / MMA-200FI / MMA-250FI
Quick Start Guide - Welding
Manual Metal Arc welding uses an electrode stick to create a contact between the
material to be welded. This is held in place with the stick clamp.
You can connect the torch and earth clamp to either Positive or Negative Terminals. This is
considered straight or reversed polarity.
Reversed polarity may be better suited for different metal types. Electrode-positive (reversed
polarity) results in deeper penetration. Electrode-negative (straight polarity) results in faster
melt-off of the electrode and, therefore, faster deposition rate. When welding choose a polarity
and if the weld characteristics are unsuitable, change the polarity.
1. Attach the earth clamp to a conductive connected part of the weld surface.
2. Ground the unit by using the ground connecting screw at the back of the machine and
connect to a grounded metal point free from the weld surface.
3. Plug in the unit to the mains power supply (must be single phase) and switch on the unit.
4. Set the required amps required based on the thickness of the metal to be welded.
5. You are now ready to start welding.
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