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DESCRIPTION OF CONTROLS
Fig. 9
Mains switch ON / OFF
"Machine operational" indicator
light comes on when mains switch is set to position "1"
Welding current regulator
The welding current may be steplessly adjusted from 5-300A
The inner scale (1-10) serves as an approximate guide to welding
current levels when remote control units are used. The remote control
units FR1-1, FR2-1, FR3-1 and FR4-1 are also equipped with scales
from 1-10, thus making it possible to use them in combination with all
machines in the WTU series.
Arc force control dial
Influences the short circuit amperage at the moment of drop transfer
(from electrode to workpiece)
At scale setting "10" there is an increase up to 80A in the
short circuit amperage at the moment of drop transfer
(hard arc)
Range of application
- Basic sheathed electrodes (coarse-globule), when these are to be
welded in the lower amperage range (vertical-up seams, edge
hardfacing welds, root welding etc.)
Practical tips!
When the setting on the arc force control dial is adjusted upwards, the
following may be observed when rutile, basic-sheathed or special
electrodes are being used:
- Easy ignition
- Reduction in welding misfires
- Less electrode burn-on
- Good root fusion in narrow-gap welding (driving arc)
- When welding thin sheet metal the danger of "burning through"
increases
- With filling-welds, there will be a tendency for the arc to become
somewhat harder
- With fine-globule electrodes (such as titanium) the above will not be
observed, as metal transfer occurs without a short circuit being
produced.
- Occasionally an increase in spattering
Connecting socket for remote control
Remote control operation:
- Plug in remote control cable plug and fix on using a swivel nut
9
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