4 Operation
Before you begin welding, be sure to read and understand the following instruc-
tions.
The Hybrid Spot is a Resistance Spot Welder that was designed for the collision
repair industry. It duplicates the welding procedure usedby the car manufacturers.
It is important to understand the design and function of
this welder before operating it.
ELECTRICITY ONLY:
The welder uses only electricity to create the welds unlike the
MIG welder which uses an arc from a feeding wire to build a weld nugget using
inert gas and the feeding wire material.
PRESSURE:
The welder has a built in air cylinder that compresses the Double-Sided
Gun’s welding tips together automatically when triggered. The compression is an
important part of a good resistance weld. The pressure is adjustable from the
Control Panel. The optimum welding pressure varies between 60-90 PSI (4-6.5
BAR). 90 PSI seems to be a common starting pressure. As a rule, increase pres-
sure with thicker metals but remember that too much pressure could decrease the
resistance of the metal between the electrodes, resulting in poor weld penetration.
CURRENT:
Another important aspect of a weld is the current applied through the
work piece. A weld is created when a large current is transferred through the lay-
ers of sheet metal. The resistance in the metal causes the area to heat up and
fuse the sheets together in a nugget.
WELD PROGRAM:
Maintaining the air pressure after the current shuts off makes
the weld cool down under pressure resulting in a harder, stronger weld. This fea-
ture is built in to the welder’s weld control program and is engaged automatically dur-
ing a weld cycle.
TIME:
The Timer controls the duration of the current applied during the weld
cycle. The ideal is to get a weld that uses higher current and shorter time to con-
trol heat buildup.
Page 10
All Info Copyright © Pro Spot International Inc.
4.1 Before you begin welding
4 Operation
welder
WELD CYCLE CHART
12
Hybrid Spot
