Sf 51 And Sf 54 Operations - Kemppi FastMig SF 51 Operating Manual

2.3

SF 51 and SF 54 operations

ON/OFF (1)
The wire feed unit remains in the OFF position when the power source is switched on, thus
preventing start-up. 'OFF' is shown on the display.
When the ON/OFF button is pressed for more than 1 second, the unit starts up. The unit is now
ready for welding and will automatically return back to it previous position, before the power
was cut off. The wire feed unit starts up also by pressing three (short) times the switch of the
welding gun.
Basic settings and displays
The wire feed speed is set via left potentiometer (control knob) and the value is shown on the
left display. The welding voltage is set via right potentiometer (control knob) and the value is
shown on the right display.
During welding, the left display shows the actual welding current value and the display on the
right shows the welding voltage.
With electrode welding (MMA) the welding current value is set via the potentiometer and
EN
the value is shown on the left display. The display on the right shows the idling voltage of the
power source. During welding the left display shows the actual welding current value and the
display on the right shows the welding voltage.
When the MIG dynamics adjustment is activated with Arc Force/Dynamics button the Mig
dynamics value is adjusted via right potentiometer (control knob) (see the information on
adjustment of MIG dynamics).
Adjustment of MIG dynamics/Arc Force (3)
With MIG welding dynamics adjustment is influenced on welding stability and spatter
amount. Zero setting is recommended basic setting. Values –> min (-9 ... -1), softer arc for
reduced spatter amount. Values –> max (1 – 9), harder arc for increased stability and when 100
% CO₂ shielding gas is used when welding steel.
With electrode welding Arc Force adjustment is influenced on welding stability. Adjustment
is needed for using different types of electrodes. Control range (-9 ... 0) is commonly used for
welding electrodes for stainless steel. Control range (0 – 9) is used for harder arc characteristic
to increase stability, e.g. for welding with thicker basic electrodes and using lower current
value than recommendated. Factory set value (0) is a good general use for adjusting the
roughness of the arc.
Selection of liquid-/air-cooled MIG gun (4)
Selection of liquid-cooled/air-cooled MIG gun is activated by pressing buttons 3 and 5
simultaneously (for more than 1 second). When 'Gas' is shown on the display, the welding
equipment will assume that an air-cooled MIG gun has been connected. If the above buttons
are pressed again, the text 'CooLEr' appears on the display and the LED indicating liquid
cooling selection lights up. In this case, the welding equipment will assume that a liquid-
cooled MIG gun has been connected to the equipment. When liquid cooling is selected, the
liquid cooling unit will start up in connection with the next equipment start-up.
The selection can also be made through the SETUP function.
6
FastMig SF 51, SF 54