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 adjust-
ments. 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 a socket wrench into the end-knob of the
slide rod (see drawing).
Engineering
For all adjustments, follow the procedures given in the
Adjustment Summary .
WARNING
DISCONNECT ELECTRIC POWER TO THE WELDER BEFORE
MAKING ADJUSTMENTS.
H-13
