Kemppi M 420 User Manual

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Quick
guide
FastMig M
M 320, 420, 520
MXF 63, 65, 67
MR 200, 300, MS 200, 300
FastCool 10

Kemppi M 420 Specifications

General

Output 40% ED	420 A at 34 V
Welding voltage range	15 V / 30 A - 35 V / 420 A
Protection class	IP23
Standards	EN 60974-1, EN 60974-10
Output Voltage Range	15 V / 30 A - 35 V / 420 A
Wire Diameter Range	0.8 - 1.6 mm
Input Voltage	3~ 400 V (-15...+10%)
Connection voltage 50/60 Hz	3~ 400 V (-15...+10%)

Summary

Connection Procedures

Connect Power and Control Cables

Connect shielding gas, control cable, and welding cable.

Install Optional Cooling Unit

Power and Operation Modes

Connect to Power Supply

Connect to mains power, switch on, and activate the panel.

Wire Feed and Spool Management

Load and Secure Wire Spool

Wire Handling and Preparation

Thread Wire and Adjust Feed Pressure

Thread filler wire and adjust feed roll pressure per wire type.

Prepare Wire End

Gun and Wire Loading Procedures

Connect Welding Gun

Connect the welding gun and hand-tighten the collar.

Load Wire with Inch Button

Welding Process and Gas Flow

Select Welding Process

Choose the appropriate welding process for your task.

Adjust Gas Flow Rate

Parameter and Dynamics Adjustment

Set Power, Speed, and Arc Length

Tune Dynamics Value