Kemppi Kempomig 4000R - Manual (Page 7)

6 KEMPOMIG 4000R, 4000WR - 0409 © COPYRIGHT KEMPPI OY KEMPOMIG 4000R, 4000WR - 0409 7 © COPYRIGHT KEMPPI OY
3.1. MAIN SWITCH
When you turn the main switch at the rear wall of the machine into position I, signal lamp for
readiness of use on the front wall is lit and the machine is ready for use.
Always switch the machine on and off from the main switch. Never use the mains plug for
switching the units and equipment on or off.
3.2. SIGNAL LAMPS
Signal lamps of the machine report on electric function:
Green signal lamp for readiness of use is always lit when the machine is connected to mains and
the main switch is in position I.
Signal lamp for thermal protection is lit, when the thermostat has been released due to
overheating. The protection is released if the power source is continuously loaded over rated values
or cooling air circulation has been obstructed. The cooling fan is cooling down the machine, and
after the signal lamp has switched off, the machine is again ready for welding.
3.3. ADJUSTMENT FOR MMA DYNAMICS *)
On adjusting MMA dynamics, you influence the arc behaviour in drop short circuit. In max.
setting the arc is at its roughest position and in min. setting at its softest position. Zero setting is
recommendable factory setting for welding of all electrodes. When roughness of arc is increased,
blowing is also increased and amount of spatter will grow.
Soft arc. Purpose: reduction of spatter in welding at upper end of recommended currents for
electrode.
Rough arc. Purpose: e.g. thin stainless electrodes in welding at lower end of recommended currents
for electrode.
3.4. CONTROL FUSE
On the rear wall of the power source the fuse 6.3 A, delayed, protects the control voltage supply of
the power source against the control cable´s short-circuit, or against overload caused by the wire
feeder unit. Use a fuse size and type according to markings. Damage caused by a wrong type fuse
is not covered by the guarantee.
3.5. OPERATION OF COOLING FAN
Cooling fan is started and stopped according to use. The cooling fan is started after ca. 30 s after
weld start and stopped after ca. 5 - 7 min after weld end.
3.6. ADJUSTMENT FOR MIG/MAG WELDING
Adjustments for MIG/MAG welding parameters are made from Feed 420R wire feeder unit which
is connected to Kempomig power source. See operation instructions for Feed 420R.
*) Feed 420R wire feeding control unit does not support the MMA welding method.