JESS Welding MIG 325 Betriebsanleitung Seite 31

3 Potentiometer control knob 'wire feed rate'
For infinitely variable regulation of desired wire feed rate, ranging from 0.5
to 24 m/min.
4 Key button 'wire feed-in'
With the button pressed down, the wire feed motor runs at the wire feed rate set on the potentiometer.
This allows the wire to be fed through the hose pack without anycurrent or gas flowing.
5 Potentiometer control-knob 'wire creep-in speed'
for infinitely variable regulation of wire creep-in speed (wire soft start).
The wire creep-in function causes the wire to advance at reduced speed at the time of starting the
welding process. Only at the instance of arc ignition does the control system change over to the preset
wire feed rate. This ensures better ignition of the arc when starting the welding process.
The rotary type control knob serves to adjust the wire creep-in speed in proportion
to the set wire feed rate. If the control knob is turned clockwise to the stop (i.e. wire
creep-in speed equals 100 % of set wire feed rate), the wire creep-in function is
inactive.
6 Potentiometer control knob 'wire burnback'
for infinitely variable regulation of wire burn-back time at the end of the welding operation.
Anticlockwise: reduces wire burnback time, i.e. wire does not burn back as far. If
burnback time is too short, the wire end adheres to the solidified weld pool.
Clockwise: increases wire burnback time, i.e. wire burns back towards the current
contact tip.
Wire must not burn back into the current contact tip,
otherwise, it will burn into the tip.
7 Cooling-water coupler plugs (only water cooled units)
to connect water hoses of torch hose pack.
Forward: marked blue, return: marked red.
8 Torch connecting socket
to connect torch hose pack
9 Master switch
Position „0":
Stellung „I": welding unit is switched on, control box lamp is lit
Fan will switch on upon temperature rise (in gas-cooled units only).
10 Temperature fault indicator
is lit in case of thermic overload occuring in unit. No starting of welding process via torch trigger possible.
With the fan running, the machine will be operable again after approx. 5 min.
11 Weld-grade switch, coarse adjustment, 2 grades
12 F1 fuse
The fuse, 2 A slow, for primary control transformer
13 Weld grade switch, fine adjustment, 12 grades
A combination of coarse and fine adjustment provides 24 different voltage grades.
Each coarse grade is subdivided into 12 fine grades. There is no crossover of coarse grades.
Operating manual
welding unit is switched off.
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