Connection Of Shielding Gas Supply - ESAB Multimaster 300 Manuel D'instructions

sectIon 3
Before threading welding wire, make sure chisel point and
burrs have been removed from wire end to prevent wire
from jamming in gun or liner.
C. Feed the wire from the spool through the inlet guide,
across the drive roll grooves and center guide into the
outlet guide and NAS connection tube.
Pressure Release
Lever
figure 9 - threading the Wire
Make sure that the proper "outlet guide tube" is inserted into
the front-panel gun fitting for the size and type of wire being
used, see Table 6 in the Replacement Parts section for wire
feed accessories.
To ensure proper wire feeding, it is important that the wire be
kept clean and that the drive rolls be periodi cally cleaned of
any chips or scale that might be carried into the gun liner.
D. Lower pressure roll assembly and secure. Turn the power
"on" and feed wire through to gun tip using the gun trig-
ger to start wire feeding.
When the power switch is on, and gun trigger is de-
pressed, the electrode wire becomes electrically hot, and
the wire drive rolls will rotate.
3.7.4 spool BraKe Drag aDJustMent
Spool brake disc friction should provide enough drag to keep
the wire spool from spinning freely after wire feed stops. If
adjustment is required, turn the adjusting screw inside the
spindle housing clockwise to increase drag or counterclock-
wise to decrease it. Drag should be just enough to limit
wire overrun.
Pressure Roll Assembly
Threading the wire
through the inlet
guide
3.8 connectIon of shIelDIng gas supplY
3.8.1 r-33-fM-320 flowmeter / regulator
The R-33-FM-320 Flowmeter / Regulator is an adjustable
regulator designed for use with CO
provides the recommended flow ranges for the R-33-FM-320
Flowmeter / Regulator.
co
2
table 2 - typical flow rates
A. With the cylinder cap in place, CAREFULLY slide the cylinder
of gas onto the Multimaster 300/300X cylinder rack.
B. Secure the cylinder to the unit using the chain provid ed.
C. Unscrew the cylinder cap.
Do not clamp regulator cap in a vise or grip it with a pair
of pliers. Distortion of cap can jam the internal parts and
cause excessively high delivery pressure as well as weaken
the threaded joint to the regulator body. this may cause
the cap to fly off and possibly injure personnel in area.
D. Open the cylinder valve slightly, for an instant, to blow
out any dust or dirt that may have collected in the valve
outlet. BE SURE to keep your face away from the valve
outlet to protect your eyes.
E. Attach the regulator to the cylinder valve. Align the regula-
tor so that the flowmeter is vertical and then tighten the
connection nut with a 1-1/8 in. open end or adjustable
wrench. To prevent damaging the O-ring seals and plastic
tube, do not use the flowmeter tube as a 'handle' when
attaching the regulator.
F. Close the flow control valve on the flowmeter.
G. Attach the gas hose from the rear of the Multimaster
300/300X to the regulator outlet connection.
27
InstallatIon
gas service. Table 2
2
20-50 cfh