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102
Q: How can I inspect and maintain my wire feeder?
A: Periodically inspect the electrode wire drive rolls. If dirty, remove the
drive rolls and clean with a wire brush. Deformed drive rolls should be
replaced. Drive rolls should be changed, adjusted or cleaned only when the
wire feeder is shut off. In addition, check the inlet and outlet guides and
replace if they are deformed from wire wear. Remember that when power is
applied to a wire feeder, fingers should be kept away from the drive roll area.
Q: What are some important electrode safety considerations?
A: Welding power sources for use with MIG and TIG welding normally are
equipped with devices that permit on/off control of the welding power output.
If so, the electrode becomes electrically hot when the power source switch is
ON and the welding gun switch is closed. Never touch the electrode wire or
any conducting object in contact with the electrode circuit, unless the welding
power source is off. Welding power sources used for shielded metal arc
welding (SMAW or Stick welding) may not be equipped with welding power
output on/off control devices. With such equipment, the electrode is
electrically hot when the power switch is turned ON.
Q: How should I store my gas cylinders?
A: Cylinders should be securely fastened at all times. Chains are usually used
to secure a cylinder to a wall or cylinder cart. When moving or storing a
cylinder, a threaded protector cap must be fastened to the top of the cylinder.
This protects the valve system should it be bumped or dropped. Cylinders
should not be stored or used in a horizontal position. This is because some
cylinders contain a liquid which would leak out or be forced out if the
cylinder was laid in a flat position. Also, welding guns and other cables
should not be hung on or near cylinders. A gun could cause an arc against the
cylinder wall or valve assembly, possibly resulting in a weakened cylinder or
even a rupture.
Q: How can I tell if my regulator is faulty?
A: The following symptoms indicate a faulty regulator:
Leaks - if gas leaks externally.
Excessive сreep - if delivery pressure continues to rise with the downstream
valve closed.
Faulty gauge - if gauge pointer does not move off the stop pin when
pressurized, nor returns to the stop pin after pressure release. Do not attempt
to repair a faulty regulator. It should be sent to your designated repair center,
where special techniques and tools are used by trained personnel.
Q: What are some tips for a safe welding environment?
A: The area surrounding the welder will be subjected to light, heat, smoke,
sparks and fumes. Permanent booths or portable partitions can be used to
contain light rays in one area. The heat and sparks given off are capable of
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