Kemppi RA User Manual

Page 21

4. shielding gas button

GAS

This button sets the machine's dynamics range for either mixed (Ar/C0₂) or carbon dioxide

(C0₂) shielding gas. A single press of the button changes the set-up for the intended gas type.

The selected shielding gas type is shown in the LCD display panel. If using argon shielding gas

for aluminium or CuSi MIG brazing filler wires, use the mixed gas setting (Ar/C0₂).
5. timer button for spot and cycle arc welding

SPOT /

CYCLE

The spot and cycle arc timer offers two modes of function. By pressing and selecting the SPOT

timer, you regulate the time duration for one single ‘SPOT’ welding cycle from either 0.1 to 9.9

seconds of arc time. By selecting the ‘CYCLE' arc timer you regulate the machine to a repeating

cycle of arc time and pause time. The pause time offered is 0.1 to 3 seconds. Select function by

depressing button 4. Regulation and adjustment of SPOT and CYCLE arc values are adjusted

by the voltage control (item 3). Function selection is confirmed by either one dot (SPOT TIME)

or dash line (CYCLE TIME) under the word 'Timer’ in the display.
6. 2t/4t gun switch latching button

2T / 4T

This button offers you two modes of welding gun functions. The selected mode is indicated as

either 2T or 4T in the display.

• in 2t mode the welding arc is started by a single press and hold of the welding gun

trigger. Welding continues whilst the trigger is held, and stops when the trigger is

released.

• in 4t mode the gun trigger is pressed and gas starts to flow. When the trigger is

released, the arc ignites. Welding continues until the trigger is pulled and released for a

second time. This mode is useful for long welding durations.

7. selection for mig/mag or hOt spOt welding function

MIG

HOT SPOT

This button switches the machine from standard MIG/MAG welding mode to a specialised

process function for localised spot heating and stress relieving for metal panels.
This function is normally used in the automotive industry and light sheet fabrication. To switch

between functions, press and hold the button for 5 seconds. See further information on HOT

SPOT function later in this manual.
8. parameter display
The large illuminated parameter display is designed to provide excellent visibility of welding

values and machine settings in a variety of welding situations. The display is protected by a

polycarbonate lens fitted into the control panel housing.
9. Overheating indicator

Under normal working conditions the overheating indicator is not visible. However, should

the machine exceed its working duty cycle, welding will cease and the thermometer symbol

will illuminate indicating that the machine has overheated. The cooling fans of the machine

will continue to operate. When normal operating temperature is regained, the machine will

reset and welding can continue. The overheating indicator will no longer be visible.