Alfa IN 5.0284, Operating Manual

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ALFA IN a.s. © www.alfain.eu
3. After that, choose the appropriate welding parameters by knobs A4 and
A6 .
4. Recommendation – For perfect manual tack welding (for example for car
bodywork repairs) use the machine in the MIG Manual mode.
ADJUSTING WELDING PARAMETERS FOR MIG MAN
1. Approximate setting for the MIG / MAG welding current and voltage
corresponds the empirical relationship U2 = 14 +0.05 I2. According to this
relationship, we can determine the required voltage. When setting the
voltage, we expect the decline in voltage during load. The voltage drop is
approximately 4,8V at 100 A.
2. Select voltage.
3. Then select the appropriate wire speed.
4. Tune the arc by changing the levels of the choke in submenu of welding
parameters settings.
Wire diameter (mm) Welding current (A) Material thickness (mm)
0,6 25 - 110 1,0 - 1,6
0,8 35 - 160 1,0 - 2,3
0,9 45 - 160 1,0 - 2,3
1,0 45 - 200 1,2 - 7,0
Table of approximate parameter settings
ADJUSTING THE MACHINE FOR ANOTHER WIRE DIAMETER
In all machines ALFA IN MIG / MAG are used rolls with two grooves. These
grooves are intended for two different wire diameters (e.g. 0,8 a 1,0 mm). Groove
can be replaced by removing the rolls and rotating them, or use a different roll
grooves with required dimensions.
1. Open the nut E1 to the left, pressure roll E2 will be opened upward.
2. Unscrew the plastic locking element E5 and remove the roll.
3. If there is a suitable groove on the roll, rotate the roll and place it back on
the shaft and secure it by screwing the element E5 .
FLUX CORE WIRE – SETTING THE POLARITY FOR MIG/MAG TORCH
1. It is desirable to have positive polarity on the MIG/MAG torch while welding
with solid wire in majority of cases. The welder is supplied from the
production with positive polarity on the MIG/MAG torch.
2. For welding with flux cored wires it may be necessary to have negative
polarity on the MIG/MAG torch.
3. The middle terminal K2 is connected to the central euro connector of the
MIG/MAG torch. We supply the welder with K2 connected to terminal (+)
K1 .