Special Features - Miller Multimatic 255 Owner's Manual

6-2.

Special Features

MIG Mode In MIG mode, the left knob is used to adjust welding voltage within a range of 12 to 32 volts. The right knob is used
to adjust wire feed speed within a range of 50 to 800 IPM. Refer to weld chart inside the wire drive compartment for
proper parameter settings according to wire type, shielding gas, and material type and thickness.
Jog Mode If gun trigger is pressed and held for more than 3 seconds without striking an arc, unit will automatically shut off
weld power and shielding gas. Trigger error will be displayed after preset length of wire is fed, dependent on MIG
gun selected.
Weld Status When trigger is released on a MIG gun, spool gun, or push-pull gun, the last actual amperage and voltage are
shown on the display for 5 seconds. If a programmed value requires adjustment after the arc is extinguished and
during the 5-second display of actual values, turning either knob will cause actual values in the displays to be re-
placed by programmed values for adjustment purposes.
MIG Gun-On-Demand MIG guns, spool guns, and push-pull guns can be used with this unit. To switch from one gun to another, momentar-
ily press the trigger on the desired unused gun to make it the active gun. Once the trigger is pressed, the unit will re-
call stored data and both displays will show the last programmed values for that particular gun. If the unit is
powered down and back on again, the gun last used will become the current active gun.
Pulsed MIG Mode Volt- In Pulsed MIG mode there is no manual voltage adjustment; instead, voltage is synergically aligned with the proper
age Adjustment wire feed speed. Arc Length adjustment is used to adjust actual arc length, which automatically adjusts the voltage.
See weld chart in front compartment for proper wire feed speed adjustment according to wire size and type.
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Complete Parts List is available at www.MillerWelds.com
OM-278174 Page 37