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BLACK = ROCKER DOWN
BLACK = ROCKER DOWN
NOTE - If both switches are placed in the OPEN (Off) position the wire feed motor is disabled and the
motor will NOT run.
6)
OPERATING
1)
Set the ON/OFF switch of the power source ON and adjust the output current to an appropriate estimate
value.
2)
Having the welding gun, wire, pressure and traction feed rollers installed, lift the pressure roller and pass
the wire through the inlet nozzle, then throught the intermediate nozzle, and after that, through the outlet
nozzle until it goes into the welding conduit, place the wire in the roller ridge which corresponds to its
diameter, and tighten the pressure roller on the traction ones slightly, through the pressure arms.
3)
Pre-adjust the shielding gas flow according to the wire type, gas and material to be weld.
4)
Set the ON/OFF switch of the wire feeder to ON.
5)
Adjust the wire advance speed to a relatively low value, and tighten the manual advance switch to take the
wire up to the output of the pistol trought the contact nipple.
6)
Open the arc and adjust the output power current, the wire advance speed and the protective gas flow to
the correct values, according to the work.
Alternate Setting - Constant Voltage Operation
("Constant Wire Feed Speed")
In this operation mode the feeder is ready for connection to " Constant Voltage " power
source which is typically used for most GMAW (MIG/MAG) welding. CV power sources
provide high short circuit currents for good arc starting and wire burn-off. "Slow run-in" of the
wire is automatically disabled. The arc length while welding is determined by a combination of
the wire feed speed knob position (TUBMATIC feeder front panel) and the weld "Voltage"
setting on the CV power source. When a good welding condition is achieved, the arc length
will be maintained by the power source and the wire feed speed will remain constant. Any
variations in wire "stick-out", wire density or shielding variations, could cause the arc length
(arc voltage) variations.
Alternate Setting - Higher Wire Speed Range
(CV or CC Operation)
Typically the maximum Tubmatic wire feed speed is approximately 18.5 m/min. For some
welding applications, higher wire feed speeds are required, for example, when using small
diameter wires on heavy plate thicknesses. In this operation mode the maximum wire feed
speed is increased to approximately 22.5 m/min. The "Slow Run-In" is enabled and the wire
feed speed varies with arc voltage changes but the change in wre speed (m/min/arc volt) is
less than the factory setting mode. A disadvantage of this operation mode is less resolution to
the wire feed speed knob and more sensitivity to changes in the knob position.
19
Tubmatic
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