Clarke 250TE Dokumentacja Pobierz pdf (Strona 18)

A. Installing the Welding Wire

NOTE: These machines are designed to accept either the Clarke 5kg or 15kg wire

spools of mild steel, stainless steel or aluminium according to the type of metal you

wish to weld.Wire spools must be purchased separately. See your Clarke dealer for

full details.

1. IMPORTANT: Ensure that the gas and electrical supplies are disconnected.

PREPARATION FOR USE

2. REF: FIG 4

To fit the wire spool,

firstly open the side

compartment by

pulling the recessed

catch backwards.

Fig.6

3. Turn the plastic knob with cam (7,) to the

position shown in Fig. 5, so that the latch is

unlocked, and pull off the collar (6).

4. Slide the spool on to the shaft, ensuring

that the Peg ‘A’ locates snugly in locating

hole ‘B’, ensuring the direction of feed of

the wire is in the direction of the arrow.

Replace the collar - 4, (5kg spool ONLY),

and turn the Plastic knob with cam (7) to

the position shown in Fig.6 thereby locking

the spool on the shaft.

NOTE: The Plastic knob, item 7 Fig.4 is also used

to apply slight tension to the wire spool. This

prevents the spool from running freely, which

could cause the wire to unspool, creating a

‘birds nest’ tangle within the side compartment.

Adjust by hand and test the tension.

1. Pressure plate

2. Mounting Shaft

3. Wire Spool

4. Collar

5. Flat Washer

6. Spring

7. Plastic Nut

Fig.5

Fig.4

With the welding current set, and welding wire trimmed, set the wire feed control

to 6, (8 for Aluminium).

Plug the machine into the mains supply or switch on at the isolator and ensuring

all precautions have been taken and with the machine set up correctly, switch

ON the machine, and lower the torch to the workpiece with one hand, whilst

holding the welding mask in the other.

Approach the work with the tip at an angle of approx. 45

and pull the torch

trigger fully. A welding current is now available at the tip and gas will be issued.

As the wire touches the workpiece, an arc will be struck......BEFORE it is struck,

cover the face with the face mask.

Maintain a gap of approx. 5 - 7mm from the workpiece to the tip, and feed the

wire into the molten pool at a steady rate, along the line of the proposed weld.

The speed of weld will depend upon the wire speed and welding current.

NOTES:

As MIG welding is an acquired skill, it is strongly advised that, if you are not fully

familiar with this type of welding, you practise on a piece of material with the

same characteristics as that of your workpiece, until you are satisfied with the

result, and you have fine tuned your welder to produce a satisfactory weld.

One of the problems experienced with novice welders, is the welding wire sticking to the

contact tip. This is as a result of the wire feed speed being too slow. It is always better

therefore to start with too high a speed, and back off slightly, to avoid the possibility of the

wire welding itself to the tip. This is the reason position 6 is recommended for start up.

The Wire Feed control is for fine tuning the wire speed. The speed of wire delivery

will increase automatically as the current is increased from MIN to MAX, and vice

versa. Therefore, once the ideal speed is achieved, by fine tuning, it should not be

necessary to adjust this control when the welding current is changed.

Listen to the sound made. An irregular crackling sound denotes too high a wire

speed. Decrease the speed until a regular, strong buzzing sound is heard.

F. Attach the Earth Clamp

Attach the earth clamp to the workpiece as close to the point of weld as possible,

without it being intrusive.

Ensure there is good contact, if necessary, clean the area with a wire brush

beforehand....Remember, the contact MUST be on bare metal - thoroughly clean.

G. Open the gas valve

Open the gas valve on the gas cylinder. Regulate the pressure by turning the

regulator knob clockwise (to increase pressure), and adjust to the desired setting.

NOTE: this varies with different metals, thicknesses and currents. Refer to a MIG

welding manual for instructions.

Your welder is now fully prepared for welding as follows:

1 2 ... 13 14 15 16 17 18 19 20

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