Functions; Mma Welding Process - Praxair AC/DC 322 PULSE Manual De Instrucciones

7. FUNCTIONS

7.1 MMA WELDING MODE (coated electrode)
- Make the necessary connections to mains and earth as described in "Installation". Connect the earth and
electrode holder cables to welding plugs + (positive) and – (negative) according to electrode polarity. If necessary,
pay attention to electrode manufacturer instructions.
- Turn the main switch on rear panel to ON position.
- The Power ON indicator lights, indicating that machine is under voltage.
- Select MMA welding (coated electrode) on the welding mode selector (Fig.1 – 1).
- Select MMA AC or MMA DC (Fig. 1 – 5).
- Adjust welding current (Fig.1 - 2), according to the following table:
Electrode diameter (mm)
Adjusting current scope (Amp)
- Hot Start (Fig.1 - 1) - To force arc ignition, adjust hot start percentage of main current and/or time (seconds).
- Arc Force (Fig.1 - 3) - To avoid electrode sticking during welding, adjust arc force current percentage of main current.
- Start welding.
Fig. 2 – MMA parameters
∅ 2,0 ∅ 2,5
50 - 70 60 - 100
MICROTIG AC/DC 322/402 PULSE
∅ 3,2 ∅ 4,0
80 - 150 130 - 200
∅ 5,0 ∅ 6,0
150 - 260 200 - 360
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