Speedaire SDR8CG00 Manuel D'utilisation Et De Pièces page 16

OPERATING INSTRUCTIONS (CONTINUED)
Moisture in compressed air will form into droplets as it comes from an air compressor pump. When humidity is high or
when a compressor is in continuous use for an extended period of time, this moisture will collect in the tank. When using
a paint spray or sandblast gun, this water will be carried from the tank through the hose, and out of the gun as droplets
mixed with the spray material.
IMPORTANT: This condensation will cause water spots in a paint job, especially when spraying other than water based
paints. If sandblasting, it will cause the sand to cake and clog the gun, rendering it ineffective.
A filter or air dryer in the air line, located as near to the gun as possible, will help eliminate moisture.
In order to maintain efficient operation of the compressor system, check the air filter, oil level and gasoline level
before each use. The ASME safety valve should also be checked weekly. Pull ring on safety valve and allow the
ring to snap back to normal position. This valve automatically releases air if the tank pressure exceeds the preset
maximum. If air leaks after the ring has been released, or the valve is stuck and cannot be actuated by the ring,
the ASME safety valve must be replaced.
With engine OFF, clean debris from engine, flywheel, tank, air lines and pump cooling fins.
WELDER GUIDELINES
This line of welding machines utilizes a process known as Shielded
Metal-Arc Welding (SMAW). This process is used to bond metals by
heating them with an electric arc created between the electrode and
the work piece.
Electrodes used for shielded metal arc welding have two parts. The
inner core is a metal rod or wire that should be similar in composition
to the base metal. The outer coating is called flux. Various types of
flux exist. Each coating is used for a particular welding situation.
While the metal is molten, it can be contaminated by elements in
the air. This contamination could weaken the weld. The flux coating
creates a protective barrier called slag that protects the molten metal
from contaminants.
When current (amperage) flows through the circuit to the electrode,
an arc is formed between the end of the electrode and the work
piece. The arc melts the electrode and the work piece. The melted
metal of the electrode flows into the molten crater and forms a bond
with the work piece as shown in Figure 6.
NOTE: Discontinue using and discard electrodes that burn down to 1 to 2 inches from the electrode holder.
Striking an Arc
Place the bare end of the electrode in the holder. Grip the holder lightly to reduce tiring of the hand and arm.
NOTE: Always keep the jaws of the holder clean to insure good electrical contact with the electrode.
The best method of striking an arc is the scratching method. Drag the electrode at an angle along the surface
much like striking a match. Upon contact with the plate, lift the electrode approximately 1/16 inch off the surface
or it will stick (See Figure 7).
NOTE: Should the electrode stick to the work piece, break it loose by quickly twisting or bending at the holder
while pulling upward. If the electrode does not break loose, disengage the electrode by releasing it from the
holder.
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MOISTURE IN COMPRESSED AIR
Release all pressure from the system before attempting to install, service,
relocate or perform any maintenance.
Do not attempt to tamper with the ASME safety valve.
Be careful not to touch the work piece or welding bench with the electrode as this
causes arc flashes.
Flux
Slag
Weld
Work Piece
Figure 6 - Weld Components
Wire
Crater