Hitbox ARC160D, Operation Instruction Manual, Page: 15 / 20

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his upper body from following downwards, and his arm should be separated from the costal part so as to
stretch out freely.
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a) flat welding b) vertical welding
Fig. 6 Posture in welding
3) Arc igniting
Arc igniting is the process for producing stable arc between electrode and workpiece in order to heat
them to implement welding. Common arc ignition mode includes scraping mode and striking mode. (See
Fig.7) During welding, touch the surface of the workpiece with the end of the electrode by scraping or
light striking to form short circuit, and then quickly lift the electrode 2~4mm away to ignite arc. If arc
ignition fails, it is probably because there is coating at the end of the electrode, which affects the electric
conduction. In this case, the operator can strongly knock the electrode to remove the insulation material
until the metal surface of the core wire can be seen.
a) striking mode b) scraping mode
Fig. 7 Arc ignition modes
4) Tack weld
For fixing the relative positions of the two pieces of weldment and welding conveniently, 30~40mm short
weld joints are welded every certain distance in order to fix the relative positions of the workpiece during
welding assembly. This process is named as tack weld.
5) Electrode manipulation
The electrode manipulation actually is a resultant movement in which the electrode simultaneously
moves in three basic directions: the electrode gradually moves along the welding direction; the electrode