OPERATION (cont.)
10
Starting to weld
BEFORE WELDING ENDURE THAT:
You have read the safety section of this manual.
All oil. Petrol and flammable containers have been removed from the area.
There is good all round ventilation. Particularly at the front and rear of the unit.
You have an adequate fire-fighting appliance on hand.
1. Connect the work earth clamp onto the metal to be welded (scrap material for
first attempt).
2. Set output and wire feed speed by turning or pressing the appropriate controls
taking into account the material type and thickness and the wire size.
3. Plug in and switch on the machine.
4. Clip off any protruding wire to 3mm(1/8)from the tip
5. Positions tip 6mm(1/4) from the point where the welding is to commence.
6. Hold the mask in front of your eyes.
7. Press the tigger and when the arc strikes move the torch slowly in the
chosen direction.
8. If the arc gives a humming sound and a blob tends to form on the end of the
wire, you have insufficient wire speed and it should be
Starting to weld
Increased; or if t gives an erratic sound with possibly a feel that the wire is stubbing
against the work and excessive spatter, you have too much wire speed and it should
be reduced. When the speeds correct you will get a steady smooth crackling sound.
•
the unit can be set to deliver different output currents at a duty cycle that is
written as a percentage on Its rating plate printed on the cover. This percentage
represent the welding time in a 10minutes cycle, e.g.60% means that the
welding time is 6minutes and rest time is 4minutes.if the unit is used beyond Its
duty cycle, the temperatures of some components might become too high due
to over use, the internal thermal protector will then prevent the unit from
operating. It’s intervention is indicated by a yellow lamp in the front panel. If this
happens leave the machine connected to the power supply. The machine will
automatically cool down. The thermal protector will reset automatically after a
short period when the components have cooled, and you will be able to restart
welding. The machine will cool down more quickly if left switched on with the
fan running.