Before You Begin Welding 4.1.1 Calibration - Pro Spot i5 Instruction Manual

i5
4) Operation
4.1 Before you begin welding
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Before you begin welding, be sure to read and understand the following instruc-
tions.
The Pro Spot i5 is a state-of-the-art Inverter Resistance Spot Welder that was
designed for the collision repair industry. It duplicates the welding procedure used
by the car manufacturers. It is important to understand the design and function of
this welder before operating it.
ELECTRICITY ONLY: The i5 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 i5 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 i5 adjusts pressure automatically to
an appropriate level for every metal type.
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 i5'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. An ideal program uses higher current and shorter time to control
heat buildup.
4 - Operation
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