C
HECK
BEFORE
W
ELDING
W
ELDING
O
PERATION
C
HAPTER
5
52
5.1.2
Precaution for protective equipment
For protection from arc ray generated from welding, spatter and spattering dross and hearing disorder from noise, observe
the following:
5.1.3
Precautions on welding place
To avoid poor welding, ensure to follow the instructions below:
5.2 Check before Welding
This section explains the check parameters before welding. To avoid welding problems beforehand, check the parameters
below when the welding environments are prepared. (These are the check parameters recommended by OTC. They also
contain check parameters after power ON or after shield gas supply.)
For handling the cooling water circulation device, refer to the instruction manual of the cooling water circulation device.
(When using the water-cooled welding torch)
•
Wear safety goggles with sufficient blocking effect or face shield in the work area and
the surrounding.
Ignoring the above may cause inflammation and burn from arc ray.
•
Wear safety goggles in the work area and the surrounding.
Ignoring the above may cause injury in the eye or burn from spatter and spattering
dross.
•
Wear protective equipment such as protective leather gloves, long-sleeve clothes, leg
covers, and leather apron.
Ignoring the above may cause electrical shock and burn.
•
Install protective screens or barriers to protect the eyes of others in the work area from
arc ray.
•
Wear an ear protector when noise level is high.
Ignoring the above may cause hearing disorder.
CAUTION
•
When the welding is performed outside with wind or when wind is caused by the indoor
ventilation facility (including fan), provide a partition to avoid the arc generating part
being exposed to wind.
Check parameter
Countermeasures
Check
1
There should be no loose connections of the
cables.
Use a proper tool to ensure connection.
2
There should be no dirt such as oil or spatter
adhering on the connection terminals or
connection part of cables.
Wipe off dirt so that the metal face of connection terminal or connection part is
fully exposed. Using a metal brush is effective.
3
There should be no tightening together of the
voltage detection cable (base metal side) and
the cable at the base metal side.
Connect the voltage detection cable (base metal side) and the cable at the base
metal side separately to a different location.
Each cable should be connected to the position near to the workpiece to be
welded.
4
The voltage detection cable should be
adequately wired.
The voltage detection cables at the base metal side and the torch side should be
wired along each other.
Keep the voltage detection cable (base metal side) at least 3.9" (10cm) away from
the cable at the base metal side.
5
The voltage detection cable should not be
damaged.
If any damage is suspected, use a tester to measure the resistance between the
voltage detection cables.
When the resistance is high, replace the voltage detection cable with a new one.
(Reference value: 15.5 m
Ƙ
/m)
