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5.1.
MIG/MAG WELDING
5.1.1.
Welding wire is automatically fed through an insulated liner
to the tip of the torch. The torch consists of a switch, liner, and control
cable. The switch activates the wire feed roller. Releasing the
switch stops wire feed. The weld current is transferred to the electrode
(the wire) from the contact tip at the torch end. The current to the
electrode is set using the rocker switch on the front of the control
panel. Wire speed must be adjusted according to current output using
the rotary control positioned to the left of the control panel. The higher
the current the faster the wire speed.
5.2.
PREPARATION FOR WELDING
IMPORTANT! BEFORE YOU COMMENCE, MAKE SURE THE
MACHINE IS SWITCHED OFF AT THE MAINS. IF WELDING
A CAR, DISCONNECT THE BATTERY OR FIT AN ELECTRONIC
CIRCUIT PROTECTOR. ENSURE THAT YOU READ, UNDERSTAND
AND APPLY THE SAFETY INSTRUCTIONS IN SECTION 1.
5.2.1.
To ensure a complete circuit, the negative lead must be securely attached to the workpiece close to the weld area. Best connection is
obtained by grinding the point of contact on the workpiece before connecting the clamp.
5.2.2.
The weld area must be free of paint, rust, grease, etc.
5.3.
THERMAL PROTECTION, see fig.6
5.3.1.
Should the welder become overheated due to prolonged use beyond the stated duty cycle the thermal protection will cause the welder
to cut out and the orange light on the front panel will illuminate. Wait for fifteen minutes for the welder to cool down at which time it will
reconnect automatically.
6. RATINGS PLATE
On the front panel of the welder is the ratings plate, giving the
following data:
1 - The BS/EU standard relating to the safety and construction of arc welding
and associated equipment.
2 - Single phase transformer.
3 - Symbol indicates welding with a continuous flow of welding wire.
4 - Symbol for Single-phase AC supply.
5 - Rating of internal protection provided by casing.
6 - Output U0 Rated minimum and maximum no load voltage.
I2, U2 Current and corresponding voltage.
X Welding ratio based on a 10 minute cycle.
20% indicates 2 minutes welding and 8 minutes rest,
100% would indicate continuous welding.
7 - Mains Supply U1 Rated supply voltage and frequency.
I1max Maximum current.
I1eff Maximum effective current.
8 - Welding current range.
9 - Serial Number. Specifically identifies each welder.
7. MAINTENANCE
▲
DANGER! Unplug the welder from the mains power supply before performing maintenance or service.
7.1.
WIRE FEED UNIT
7.1.1.
Check the wire feed unit at regular intervals. The feed roller wire guide plays an important part in obtaining consistent results. Poor wire
feed affects the weld. Clean the rollers weekly, especially the feed roller groove, removing all dust deposits.
7.2.
TORCH
7.2.1.
Protect the torch cable assembly from mechanical wear. Clean the liner from the machine forwards by using compressed air. If the liner is
blocked it must be replaced.
7.3.
TURNING FEED ROLLER IMPORTANT: TURN THE FEED ROLLER TO SUIT THE WIRE SIZE.
7.3.1.
There are two grooves on the feed roller, 0.6mm and 0.9mm. Always have the groove that is being used on the outside of the roller
(nearest to you). To turn the feed roller first loosen the wire tension knob and move it into its up position (see fig.8-1) then move
the tensioning roller assembly to its down position (see fig.8-2). Take hold of the triangular knob on the roller retainer and rotate
it 90°anticlockwise to release it as shown in fig.8.3. Now pull the roller retainer off the drive spindle to reveal the roller as shown in fig.9.
fig.8
© Jack Sealey Limited
fig.6
fig.9
Original Language Version
fig.7
fig.10
MIGHTYMIG100.V2 Issue: 2 (H,5) 19/05/20
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