Part No. 729-110-040 Rev. 1.41 | June 2016
© 2016 Nelson Stud Welding, Inc. All Rights Reserved.
19
3.3.4 Connection of Work piece
When connecting the work piece ground terminals, attention must be paid to the following:
1. The work piece ground terminals must be connected directly to the work piece or to the work piece fixture
(welding bench, welding grid).
o
Steel constructions, tracks, pipelines, etc. may not be used as current conductors, unless they
themselves are the work pieces to be welded.
2. The welding current circuit may not be earth grounded.
EXCEPTION: The workpiece itself or the workpiece fixture are earth grounded compulsorily (pipelines,
shipbuilding, etc.).
3. Place the work piece ground terminals, if possible, at the same distance from the point of welding when 2
ground clamps are used.
Prior to connecting the earth ground terminals, the following advice on
avoiding arc blowing must be observed.
3.4
Arc Blow Effect
Blowing effect is the designation for the lateral deviation of the arc from a central position. Depending on the
cause, a distinction is made between the following blowing effects.
Thermal blowing effect.
Deviation of the arc as a result of the expansion and turbulence of heated gases
in the combustion area of the arc.
Magnetic blowing effect.
Deviation of the arc as a result of the influence of magnetic or electromagnetic
fields.
The possibilities of reducing the thermal blowing effect are limited. They are restricted to precise centering of
the stud and chuck.
Summary of Contents for ArcCharger N550C DOMESTIC
Page 18: ...Part No 729 110 040 Rev 1 41 June 2016 2016 Nelson Stud Welding Inc All Rights Reserved 17 ...
Page 60: ...Part No 729 110 040 Rev 1 41 June 2016 2016 Nelson Stud Welding Inc All Rights Reserved 59 ...
Page 62: ...Part No 729 110 040 Rev 1 41 June 2016 2016 Nelson Stud Welding Inc All Rights Reserved 61 ...
Page 64: ...Part No 729 110 040 Rev 1 41 June 2016 2016 Nelson Stud Welding Inc All Rights Reserved 63 ...