8630196
120 Volt spot Welder
V 4.2
20
For technical questions call 1-800-665-8685
2. Measure the thickness of the total weldment (X).
3. Adjust the tong gap to the measurement of
step 2 minus half the thickness of the thinnest
weld number (Y).
4. Plug in the machine.
5. Insert the parts to be welded between the electrode
tips and bring the tips to welding pressure. There
should be a slight deflection of the tongs. This may
be measured with a straight edge set on the tong
longitudinal axis.
CAUTION! Do not hold the workpieces close to the tongs. Great amounts of heat is generated by the tongs
upon the workpiece and will create a lot of heat near the spot weld sight.
6. Energize the spot welding machine by pressing the power switch located under the handle and make a
sample weld.
NOTE: The power switch can be activated by pressing it either to the left or to the right for use with left or
right handed users. The middle position is the OFF position.
7. Test the weld by visual and mechanical means. Check the electrode tip for deformation and contamination
(see Test Procedures).
8. Adjust the tong pressure and time as required.
TEST PROCEDURES
The test procedure outlined are very simple and require a minimum of equipment to perform:
1. VISUAL TEST
Observe the deformation and shape of the surface contact points at both sides of the weld. Excessive “dishing”
of the surface contact point indicates one or more of the following:
a. Excessive tong pressure
b. Weld time too long
c. Misalignment of the electrode tips
If the resistance spot weld does not have an even, concentric surface appearance, the problem could be
misalignment of the electrode tips. Align the electrode tips with the power off and a typical weld joint between
the tip surfaces.
2. MECHANICAL TEST
Place one end of the resistance spot weld sample in vice jaws. Use mechanical means to force the weld apart.
One side of the weld should pull loose from the parent metal with a metal extension from the weld. Check for
proper weld diameter.
CARE & MAINTENANCE
1. Maintain the tool with care. A tool in good condition is efficient, easier to control and will have
fewer problems.
2. Inspect the tool components periodically. Repair or replace damaged or worn components. Only use
identical replacement parts when servicing.
3. Only use accessories intended for use with this tool.
4. Follow instructions for lubricating and changing accessories.
