TM 9-3405-215-14&P
JAW ALIGNMENT
The importance of accurate jaw alignment cannot be overemphasized. The jaws have been carefully aligned during
assembly at the factory; however, it may be necessary to align the jaws if they are bumped or damaged. The easiest and
most effective way to see if misalignment exists is to actually inspect the weld joint. A misaligned weld is usually caused
by worn or dirty welder jaws.
(1)
Check with a straight edge to see if the jaws are in alignment with each other with respect to elevation, inclination,
and twist.
(2)
The stationary jaw can be moved slightly on its mounting screws by loosening the screws and tapping the jaw.
(3)
The movable jaw tilt is adjusted with two set screws as shown in drawing.
Detailed alignment instructions are given in a separate "Engineering Adjustment Summary".
ADJUSTMENTS (Jaw Gap, Electrical Cut-off, Upset Force)
"Incomplete" and "burned out" welds are a result of incorrect adjustments. If the weld cycle is cut off too soon, the weld
will be incomplete (low heat produces a weak weld which may be only partly joined). Too long a weld cycle will produce
excessive heat which will result in a "burned out" weld (excess molten metal around a discontinuous joint).
For adjusting the cut-off point, a hole in the outside leaf of the cut-off switch permits insertion of an Allen wrench into the
end-knob of the slide rod (see drawing).
For all adjustments, follow the procedures given in the "Engineering Adjustment Summary".
WARNING
DISCONNECT ELECTRIC
POWER
TO
THE
WELDER
BEFORE
MAKING
ADJUSTMENTS.
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