ESAB CIGWELD Transmig 255i, Руководство по эксплуатации, Страница: 31 / 96

OPERATING MANUAL
Transmig 220i
Transmig 255i Transmig 255i
Manual 0-5550 4-5 OPERATION
When GMAW/FCAW (MIG) Mode is Selected
In this mode the control knob is used to adjust the output voltage of the unit. The welding voltage is
increased by turning the knob clockwise or decreased by turning the knob anti-clockwise. The optimum
voltage level required will dependent on the type of welding application. The setup chart on the inside
of the wire feed compartment door provides a brief summary of the required output settings for a basic
range of MIG welding applications.
When MMAW (Stick) Mode is Selected
In this mode the multifunction control knob is used to adjust arc force. Arc force control provides an
adjustable amount of welding force (or “dig”) control. This feature can be particularly beneficial in
providing the operator the ability to compensate for variability in joint fit-up in certain situations with
particular electrodes. In general increasing the arc force control toward ‘10’ (maximum arc force) allows
greater penetration control to be achieved. Arc force is increased by turning the control knob clockwise
or decreased by turning the knob anti-clockwise.
When TIG Mode is Selected
In this mode the multifunction control knob is used to adjust down slope. Down slope allows the user
to select the ramp down time at the completion of the weld. The main function of down slope is to allow
the welding current to be gradually reduced over a pre-set time frame such that the welding pool is given
time to cool sufficiently.
Note that when in 2T normal mode (refer item 12), the unit will enter down slope mode as soon as the
trigger switch is released (ie if the multifunction control knob is set to 5, the unit will ramp down from
the present welding current to zero over 5 seconds). If no down slope time is selected then the welding
output will cease immediately. If the unit is set to 4T latch mode, to enter down slope mode the trigger
must be held in for the selected time period (ie press and release trigger to commence welding, then press
and hold trigger again to enter down slope mode). Should the trigger be released during the down slope
phase (4T only), the output will cease immediately.
11. Arc Control (Inductance)
The arc control operates in GMAW (MIG) mode only and is used to adjust the intensity of the welding arc.
Lower arc control settings make the arc softer with less weld spatter. Higher arc control settings give a
stronger driving arc which can increase weld penetration.
12. Trigger Mode Control (MIG and TIG Mode only)
The trigger mode control is used to switch the functionality of the of the torch trigger between 2T (normal)
and 4T (latch mode)
2T Normal Mode
In this mode, the torch trigger must remain depressed for the welding output to be active. Press and hold
the torch trigger to activate the power source (weld). Release the torch trigger switch to cease welding.
4T Latch Mode
This mode of welding is mainly used for long welding runs to reduce operator fatigue. In this mode the
operator can press and release the torch trigger and the output will remain active. To deactivate the power
source, the trigger switch must again be depressed and realised, thus eliminating the need for the operator
to hold the torch trigger.
Note that when operating in GTAW (TIG mode), the power source will remain activated until the selected
downslope time has elapsed (refer Item 10).