HW0482309
23
(4)
Grounding
Ground terminal (crimp terminal M6, 14 mm
2
) is provided at the lower part of the rear
face of the welder for safe operation. Connect the ground wire of 14mm
2
or more to
the terminal. Ground resistance must be 100
Ω
or less.
Be sure to ground base metal at resistance of 100
Ω
or less individually as shown in
Fig. 2-3. If it is not grounded, voltage may be generated in the base metal resulting in
electric shock. Make sure that the grounding is always done individually, separated
from grounding for the robot. Also, connect the welder and the base metal with
exclusive-use base metal cable.
2.6
Connection of Shielding Gas System
2.6.1
For Mixed Gas or Carbon Dioxide Gas Welding
The 100 VAC power supply is required for a heater of carbon dioxide gas regulator. Connect
the gas cylinder as follows:
(1)
Remove dust from the gas cylinder connecting port. Install the MAG/carbon dioxide
common gas regulator. Check the quality of the gas and the type of the cylinder
(2)
Insert one end of the supplied rubber gas hose into the outlet of the gas regulator,
and the other end into the gas terminal inlet of the wire feeder. Clamp both ends
securely with hose bands.
2.6.2
Installation Site and Gas Cylinder Environment
Handle the gas cylinder with special care since it contains high pressure gas. Refer to the
instruction manual attached to the gas cylinder.
(1)
Installation Site of Gas Cylinder
Place the gas cylinder in a specified
gas container position that is not
exposed to direct sunlight. If the gas
cylinder is unavoidably placed at the
welding site, it must be fixed to post or
cylinder stand in an upright position to
prevent it from falling. Also, the gas
cylinder must not be heated by a
welding arc or the like.
(2)
Type of Gas Cylinder
Carbon dioxide gas-filled cylinders can
be classified into two types: One is the
general type that is not the siphon type,
and the other is the siphon type.
Never use siphon type gas cylinders.
The provided carbon dioxide gas
regulator is not applicable to siphon
Ga
s cyl
in
d
e
r
Ga
s cyl
in
d
e
r st
an
d
Fix the gas cylinder to
prevent it from falling.
Fig. 2-4 Installation Site
of Gas Cylinder
