ESAB Mig C420, Instruction Manual, Page: 74 / 239

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C420e
6.2.5 Idle mode
The machine has an idle mode. The fan is switched off 5 min after the end of the last
welding, or after 5 min of work with decreased speed without welding. The pump is
switched off 3 min after the last welding. When both fan and pump are switched off
the power supply lamp [4] on the front panel is blinking.
6.3 ESABMig C420w/C420
The ESABMig C420w/420 is equipped with standard control unit. Welder can
manually select and adjust all welding parameters.
S Wire speed (1,9 – 25m/min) is set with knob [12].
S
The stroke control (2/4 stroke) is selected with switch [13].
S Creep start i.e. start with 50% wire speed is toggled ON/OFF with switch [14].
S
Burn back time is set with knob [15].
The machines C420w/C400 can be fitted with a digital instrument that displays
current and voltage. It incorporates a hold function (see page 238).
6.4 ESABMig C420sw/C420s
ESABMig C420sw/420s control unit enables two ways of welding control:
S the standard control (welder can manually select and adjust all welding
parameters) – switch “SYNERGY” [19] set to OFF
S the synergy control (partly preprogrammed welding parameters) – switch
“SYNERGY” [19] set to any material/gas group
The stroke control (2/4 stroke) or motor inching (only wire feed motor is activated)
is selected with switch [22].
Burn back time is adjusted with knob [21].
Spot welding (turning on and time setting 0,5 – 4s) is activated with knob [13].
For machines C420sw/C420s digital instrument is included as standard.
6.4.1 Standard control mode
When standard control mode is selected lamps [17, 18] are off and only a lower row
of digital display [14] shows wire speed reference (selector [16] shall be in position
”m/min”).
Operator selects the required voltage [2, 3] and he may set wire speed wthin full
range (1,6 – 25m/min) with knob [12].
During welding process the upper row of display shows actual welding voltage or
current, depending on selection with switch [15]. When welding process is stopped,
displayed values are ”frozen” (dimmed display).
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