4.1.
Mig/Mag Welding.
A spool of welding wire is positioned on the welders spool holder and automatically fed through an insulated liner in the torch to the tip.
The torch assembly consist of a switch, liner, gas hose, and control cable. The switch activates the wire feed roller and the gas flow.
Conversely, releasing the switch stops the wire feed and gas flow. The weld current is transferred to the electrode (the wire) from
the contact tip at the end of the torch. A gas cup fits over the contact tip to direct the gas flow towards the weld ensuring that the
arc welding process is shielded from oxidising air contaminates. The shielding gas also assists heating of the weld materials.
The torch is connected to the positive side of a DC rectifier, and the negative clamp is attached to the workpiece (fig 6).
4.2.
Spot Welding.
Remove the gas cup and fit a spot welding gas cup (120/722150). Turn the voltage and wire speed to the highest setting allowed by your machine. Push the spot
gas cup onto the material to be welded. Set the timer switch located on the front panel for the thickness of material to be spot welded. The castelations on the cup
keep it the correct distance from the weld pool and allow you to push the two pieces being welded together. Press the torch trigger and hold it until the machine cuts
out. The wire will feed through during the allotted time and create the weld.
4. 3.
Preparation for Welding.
s
s
s
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. WE RECOMMEND THE USE OF SEALEY PROSAF/12V OR 24V IN ORDER TO PROTECT
SOPHISTICATED ELECTRONICS. ENSURE YOU HAVE READ AND UNDERSTOOD THE ELECTRICAL SAFETY INSTRUCTIONS IN CHAPTER 1.
4. WELDING PRINCIPLES & PREPARATION
ARC Welding: Models AUTOMIG190/ARC & 260/ARC.
have socket on the front panel for 230V outlet resistance spot welding. Plug spot welder electrode holder cable into the DIN socket and change
the Continuous Switch from Gas to the ARC position. Being fitted with a Mig transformer/rectifier, these units are ideal for use with aluminum
electrodes and may also be used with hard facing, or rutile rods as well as basic electrodes.
Preparation for welding.
IMPORTANT: Welder must be switched off at the mains before starting.
4.3.
Connecting the Earth Lead
To ensure a complete circuit, the earth lead must be securely attached to the work piece that is to be welded.
4.3.1.
The best connection is obtained by grinding clean the point of contact on workpiece before connecting earth clamp to the job to be Welded.
4.3.2.
The weld area must also be free of paint, rust, grease, etc.
4.4.
Setting Up
The automatic wire feed system, must be set up as follows:
4.4.1.
Select the voltage step that best suits the thickness of the material to be welded
4.4.2.
Adjust the wire feed knob until a perfect weld bead is obtained.
NOTE:
If the wire speed increases, even to reaching maximum, do not be concerned as the wire speed setting will re-adjust
correctly to any voltage step selected thereafter.
4.5.
Welding mild steel
To weld mild steel you can use CO2 gas for most tasks where spatter and the high build up of weld do not pose a problem.
To achieve a spatter free and flat weld, you
must
use an
Argon/CO2 mixture.
4.6. Welding
aluminium
To weld aluminium use:
3
Argon gas,
3
0.8mm Contact Tip,
3
0.8mm Aluminium Wire, (MIG/2/KAL08).
3. 5.
Clutch adjustment
It is essential that the clutch is adjusted correctly.
3. 5. 1.
Once the wire is fed through the torch, switch on the machine and set the wire speed and voltage
switch to maximum.
3. 5. 2.
Depress torch switch and release quickly. If spool overruns it indicates that the clutch is too loose.
3. 5. 3.
Tighten the clutch
(located in the centre of the wire spool holder)
with a socket spanner and test the
machine as above until the wire stops over running.
NOTE: DO NOT
OVER TIGHTEN THE CLUTCH AS THIS WILL CAUSE WIRE FEED PROBLEMS.
3. 6.
Euro Connection Models 190/ARC & 260/ARC
This welder is fitted with a Euro Connection quick release torch. (fig 5).
3. 6. 1.
Simply line the pins in the torch up to the appropriate holes in the machine, push in and tighten with
the knurled knob (fig 5 G). Remember to remove the Torch after welding is completed and store
in a safe dry place.
Note: Accidental damage to your torch is not covered by the guarantee.
PILOT LAMP
This lights up when
the machine is
running.
WIRE FEED SYMBOL
Lights up when machine
overheats and cuts out.
The machine can be used
again when cool.
TORCH (MIG WELDING)
MIG welding torch is
connected to the
machine where this
symbol is located.
SWITCH POSITION
Three positions:
Off, Gas welding & ARC
welding(CD.C.)
FUSE SYMBOL
This machine contains a
fuse which may from time
to time need replacing
ELECTRO-FAN
Cools the machine when
running.
EARTH CLAMP
The earth clamp is connected
to the machine via this outlet.
GRAPHIC SYMBOLS AS FOUND ON FRONT PANEL:
fig 5
fig 6
AUTOMIGS 190,210,235,250, 190ARC & 260ARC - (0095) - (1) - 010299
