26
As with any work area, make sure safety
glasses with side shields are worn when
handling or changing wire or clipping
wire off at the spool or at the end of the
torch. Hold onto the wire coming off the
spool with one hand before clipping.
Serious eye injury can result due to the
springiness of the wire which can
quickly unravel, or a cut wire end which
may shoot across the room.
When the power switch is on, and gun
trigger is depressed, the electrode wire
becomes electrically hot, and the wire
feed rolls are activated.
Do Not adapt R-33-FM-580 for use with
CO
2
. Relief device may rupture if CO
2
is
used with the R-33-FM-580. For CO
2
ser-
vice, order R-33-FM-320, P/N 21558.
SECTION 3 INSTALLATION
Reel Hub
Spool Retaining Pin
Spool Brake
Adjustment Screw
Thread the wire from
bottom of wire spool
Lift Upper Drive
Roll Assembly
Outlet
Guide
Center
Guide
Inlet
Guide
Drive Roll Pressure
Adjustment Lever
C. Feed the wire from the spool through the inlet guide, across the drive
roll groove, through the center guide and into gun outlet guide.
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 2.1
for wire feed accessories.
To insure proper wire feeding, it is important that the wire be kept clean
and that the drive rolls be periodically cleaned of any chips or scale that
might be carried into the gun liner and cause sticking.
D. Lower pressure roll assembly and secure. Check that the gears mesh.
Feed wire through to gun tip with gun trigger (power ON).
3.9 SPOOL BRAKE ADJUSTMENT
Brake disc friction should provide enough drag to keep the wire spool or coil from
spinning freely after wire feed stops. If adjustment is required, turn adjusting
screw clockwise to increase drag, counterclockwise to decrease it. Drag should
be just low enough to limit wire overrun.
3.10 CONNECTION OF SHIELDING GAS SUPPLY
The R-33-FM Regulator-Flowmeter is designed for use with high pressure
cylinders of shielding gas. It is adjustable for delivering up to 50 cfh through the
torch. To set up the system do the following:
A. With the cylinder cap in place CAREFULLY slidethe cylinder of gas
onto the Migmaster 250 Plus cylinder rack.
B. Secure the cylinder to the unit, using the chain provided.
C. Unscrew the cylinder cap.
D. Be sure to keep your face away from the valve outlet to protect
your eyes. Crack the cylinder valve slightly, just for an instant, to blow
away any dirt or dust which may have accumulated in the cylinder valve
outlet.
Never stand directly in front of or behind
the regulator when opening the cylinder
valve. Always stand to one side.
Figure 3.13 Threading the Wire
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