Clarke 250TE Specifiche Scaricare il pdf (Pagina 22)

OPERATION

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, 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.

As the electrode touches the workpiece, an arc will be struck......before it is struck,

cover the face with the face mask.

Simultaneously gas will be generated, if the wire is flux cored, or gas will be issued

if you are gas welding, and the wire will be fed into the molten pool.

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

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

advisable to test your settings on a scrap piece of metal with similar characteristics

to those of the workpiece. Fine tune the welding speed and/or current flow, as

required, until a satisfactory weld is achieved.

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.

Whenever the welding current regulation is changed, a corresponding change

in wire speed may be necessary. If the speed is too slow, the wire will weld itself to

the tip.

WELDING TIPS

1. Try to maintain the tip of the nozzle at an angle of approx. 45

and at a constant

distance of approx 5-7mm from the workpiece.

2. Try to maintain a constant speed of movement with the torch.

3. Do not weld in windy conditions or in an area where ventilation is a problem,

or where air flow fluctuates.

4. ALWAYS keep the wire and nozzle clean...NEVER use rusted wire.

5. Avoid sharp bends or kinks in the welding hose.

6. Whenever possible, clean out the wire liner with compressed air when

replacing the wire spool.

7. Periodically remove the dust, using LOW PRESSURE compressed air, within the

casing. Adequate heat dissipation is essential during the welders operation.

MAINTENANCE

Frequency of maintenance operations depends on the operating conditions, how

intensively the welder is used, and how clean or dirty the welding site is (aggressive

atmospheres, etc).

Always inspect the cables, both earth return and torch cable, before use to ensure

they are in perfect condition.

Ensure the earth clamp is clean and secured correctly to the cable.

Check the gas hose and Pressure Regulator for security and serviceability, and

ensure there is sufficient gas to complete the job in hand.

As a general rule the power supply should be inspected internally at least annually.

Consult your CLARKE dealer

WARNING!

ELECTRICITY CAN KILL

NEVER TOUCH LIVE ELECTRICAL COMPONENTS

DISCONNECT THE POWER SUPPLY BEFORE ALL INSPECTIONS AND

MAINTENANCE OPERATIONS

BEWARE HOT SURFACES.....ALWAYS LET THE POWER SUPPLY COOL DOWN

BEFORE ACCESSING INTERNAL COMPONENTS.

WELDING SHIELD

Always maintain the welding mask in good condition. If the clear glass protection

lens becomes badly pitted, sufficient to interfere with vision, or cracked, have it

replaced immediately.

Replacement clear and dark lenses are available from your Clarke dealer - see

Parts Lists for details. NEVER use any dark filter lens other than that provided by

CLARKE International, or one with the same certified ‘Optical class’ (degree of

protection).

The shield should always be cleaned with a clean soft cloth after use, ensuring

the lenses are clean. Remove any dust that may have accumulated and store it

in a safe place where it cannot be damaged.

NEVER use a shield that is not in perfect condition.

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Clarke 250TE Specifiche Pagina 22

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