5.1.1. Source placing
The source must be placed on a solid and flat base to ensure sufficient space for the
cooling air supply and outlet in front of the both faces (ca. 500mm). The metal fall-out
(e.g. at the grinding) must not be sucked into the machine directly.
The welding source is made with the cover IP 21, which means:
-protection against penetration of foreign matters with diameter bigger than 12
mm
-protection against vertically dripping water
With regard to the cover level, the source can be used and stored so that it would not
be exposed to direct weather effects. Especially it is not allowed to use it and store it
in the rain.
5.1.2. Welding cables
The welding cables must have a cross-section corresponding to the current loading
and must be finished with corresponding quick plugs.
The ground clamps and electrode holder must correspond to the current loading.
The welding conductors, electrode holder must not show any damage.
It is necessary to connect the ground clamp on the weldment as near to the welded
place as possible.
5.1.3. Source connection to supply mains
The source is constructed for connection to 5-conductor main TN-C-S with voltage
3x400V/50Hz (see point 2).
Installation of the main, plug for the source connection and its protection must
correspond to the valid standards and electro-technical regulations.
5.2. Welding process MMA
- connect the source to the supply mains
- switch on the main switch of the source ”20“
- turn switch “9“ into the position “MMA“
- connect the welding cables into the plugs “13“ in polarity corresponding to the
type of the electrode used
- press and release the button “5“ – on A-metre “6“ the segment “A“ flashes
- set the required welding current by the regulator “8“ – the current value is
displayed by A-metre “6”.
When welding A-metre measures the actual welding current. Its value stays
displayed in A-metre for 3 s after finishing the welding so the operator can
retrospectively control the set and actual value of the current.
5.2.1. Function “HOT-START“
The function is controlled by the switch “16“.
When the function “HOT-START“ is switched on, the welding current is increased
approximately by 50% of the set value for the period of 0.4 s at arc ignition.
