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2.  SPECIFICATION  

 

 

2.1 SPECIFICATION

Stock No.  ..............................................................  70052
Part No.  ............................................................  TW250A
Rated voltage .................................................. 230~50Hz
Input current ............................................................ 200A 
Current range .................................................. 10 – 200A
Electrode size ...............................................1.6 – 5.0mm
Pulse frequency ...............................................01. – 20Hz
Degree of protection ..............................................  IP21S
Cooling ...............................................................  Air (fan)
Insulation class .............................................................. F
Duty cycle ........................... 20% at 200A, 100% at 155A
Dimensions  ......................................557

 × 

210

 × 

395mm

Weight (Gross/Net/machine only) ............... 27/25.5/18kg

3.  HEALTH AND SAFETY 

INFORMATION  

 

3.1  GENERAL SAFETY 

INSTRUCTIONS

 Warning! Read all safety warnings and all 

instructions. When using electric tools basic safety 

precautions should always be followed to reduce the risk 

of fire, electric shock, and personal injury including the 

following.
Read all these instructions before attempting to 

operate this product and save these instructions.
Electric shock can kill:
–  Remove the plug from the socket before carrying out 

adjustment, servicing, or maintenance.

–  Allow 5 minutes waiting time for the capacitors to 

discharge before removing the panels for any 

maintenance operations.

–  Do not touch live electrical parts.
–  Never use electrode holders or cables with damaged 

or deteriorated insulation.

–  Keep the working environment, equipment, cables, 

and clothing free from grease, oil, moisture, and dirt.

–  Ensure the welding machine has been correctly 

earthed and all panels are fitted securely.

–  The operator must be insulated from the floor and 

workbench using a dry insulation mat.

–  Wear isolating footwear and gloves that are in good 

condition, i.e. without holes.

–  In hazardous conditions of increased electric shock 

always ensure a second person is present in case of 

an accident.

–  Never change electrodes with bare hands or damp 

gloves (for ARC/MMA welders).

–  Keep welding cables away from power cables.
–  Regularly inspect the condition of the welding, earth, 

and power cables for signs of damage.

–  Do not leave the machine unattended and remove 

the plug from the socket when not in use.

–  Do not use welding cables unsuitable for the 

amperage.

–  Ensure the earth clamp is adjacent to the weld seam, 

secured to bare metal and when not in use is 

insulated for safety.

–  Keep all equipment well maintained.
–  The operator shall prevent gas cylinders in the 

vicinity of the workpiece from becoming part of the 

welding circuit.

Fumes & Gases can be harmful:
–  The welding process generates hazardous fumes as 

a by-product. Inhalation of these fumes is hazardous 

to health.

–  Keep your head away from the weld to avoid 

breathing the fumes.

–  If welding in confined spaces ensure adequate 

ventilation and use a fume extractor.

–  Welding fumes displace oxygen. The danger of 

suffocation.

–  By-products of welding can react with other chemical 

vapours to produce a toxic/explosive environment.

Welding can cause fire or explosion:
–  Arc welding and allied processes can cause fire and 

explosions and precautions shall be taken to prevent 

these hazards.

–  Before starting a weld ensure the area is clear of 

flammable materials.

–  Remove any inflammables to a safe distance, 

especially substances likely to generate a dangerous 

vapour.

–  The welding arc can cause serious burns. Avoid 

contact with skin.

–  Sparks and molten metal are cast out during 

welding. Take precautions to prevent fire igniting and 

wear protective clothing.

–  Sparks and molten metal can pass through gaps. Be 

aware that fire can start out of sight. Flammables in a 

locked cabinet may not be safe.

–  Do not weld pressurised containers.
–  Do not weld tanks, drums, or other vessels until they 

have been correctly cleaned/prepared for welding.

–  Always have appropriate and fully maintained 

fire-fighting equipment suitable for the materials used 

and for use in electrical environments available in 

close proximity at all times.

–  Keep clothing free from oil and grease.
–  Wear a hat, flame-proof apron, woollen clothing, 

gloves, long sleeve tops with closed neck, trousers 

(without turn-ups) to cover non-slip boots.

Содержание Expert 70052

Страница 1: ...ch the product has been designed and contains all the necessary information to ensure its correct and safe use By following all the general safety instructions contained in this manual it will ensure both product and operator safety together with longer life of the product itself All photographs and drawings in this manual are supplied by Draper Tools to help illustrate the operation of the produc...

Страница 2: ...death Caution Information that draws attention to the risk of damage to the product or surroundings 1 3 EXPLANATION OF SYMBOLS Warning Read the instruction manual Warning Wear suitable welding eye face protection Warning Wear ear defenders During grinding operations Warning Wear protective gloves Keep out of the reach of children Warning Danger of electric shock Danger of fire Danger of explosion ...

Страница 3: ...unattended and remove the plug from the socket when not in use Do not use welding cables unsuitable for the amperage Ensure the earth clamp is adjacent to the weld seam secured to bare metal and when not in use is insulated for safety Keep all equipment well maintained The operator shall prevent gas cylinders in the vicinity of the workpiece from becoming part of the welding circuit Fumes Gases ca...

Страница 4: ... eyes and impair vision infra red heat radiation can damage skin and eyes Such radiation can be direct or reflected from surfaces such as bright metals and light coloured objects Gas cylinders Gas cylinders should be located or secured so that they cannot be knocked over Shield gas containers can explode if damaged Take care when handling Ensure gas cylinders are shut off when not in use and betwe...

Страница 5: ...e product The packaging material should be retained during the warranty period in case the product needs to be returned for repair Warning Some of the packaging materials may be harmful to children Do not leave any of these materials in reach of children If any of the packaging is to be thrown away make sure they are disposed of correctly according to local regulations 5 TECHNICAL DESCRIPTION 5 1 ...

Страница 6: ...clear Equally ensure no debris can be drawn into the machine 6 3 CONNECTION TO THE POWER SUPPLY Make sure the power supply information on the product s rating plate is compatible with the power supply you intend to connect it to A suitable plug must be fitted by a qualified electrician This product s wiring has insulation stripped in preparation for wiring a 32A plug not supplied It is designed fo...

Страница 7: ...ver as a general rule for DC output negative electrode machines a 1 6mm thorium oxide tungsten electrode will suffice Tungsten Ø Amp Range 1 2mm 70A 1 6mm 70 140A 2 4mm 140 250A 3 2mm 240A The selection of the ceramic shroud is based on the tungsten electrode and should be 4 to 6 times the tungstens diameter For example a 1 6mm tungsten could be used with a No 4 6 4mm ceramic shroud a No 5 8 0mm o...

Страница 8: ... hose to the TIG torch To attach the TIG torch 7 to the front panel coupling marked GAS 4 plug in and twist to lock Attach the earth clamp 8 into the coupling marked 5 plug in and twist to lock To connect the torch trigger cable 7 1 fit the 2 pin plug into the corresponding connection port marked 2 Secure the outer ring by screwing it onto the threaded outside part of the trigger connection port C...

Страница 9: ...pedal controls the level of current incrementally until the maximum level set by the dial is reached 7 FIG 7 4 MMA MANUAL METAL ARC SETUP FIG 8 To attach the electrode holder 9 to the front panel insert the plug into the connection port marked 1 and twist to lock Attach the earth clamp 8 into the connection port marked 5 plug in and twist to lock 8 FIG 7 5 MMA ARC WELDING FILLER ROD ELECTRODE SELE...

Страница 10: ...and the consumable electrode rod melts the parent metal and the filler metal in a weld pool The electrode s flux coating reacts during this process and develops into a shield gas protecting the weld bead Part of this reaction leaves a trail of slag which solidifies behind the weld pool protecting the weld as it cools The most common varieties of electrodes are cellulosic rutile and basic the latte...

Страница 11: ...ndicating light no load voltage indicator light M Alarm light Welding machine overheat over current alarm light 7 7 FUNCTION PARAMETERS Function Description Adjust Range Default value Pre flow The time of gas prior to welding 0 10 S 0 1 S Hot start Hot start current 5 200A 100A Arc start current The preset starting current is adjusted when arc closing is controlled 5 200A 40 A Slope up When arc cl...

Страница 12: ...om the workpiece to the tungsten needle to the negative current current flowing from the tungsten needle to the workpiece in other words to act in one cycle If the positive current decreases increases at a given time the negative current increases decreases accordingly The positive current is mainly used for welding while the negative current is mainly used for cleaning the oxide film of the workp...

Страница 13: ...ctrode size Secure the earth clamp to a clean sound section of the parent metal in the vicinity to the intended weld With all safety equipment in place and personal protective clothing on begin welding Lower the electrode down toward the parent metal and strike the arc The position of the electrode is critical to the arc and the end result Achieving a good weld will take practice For more detailed...

Страница 14: ...c shock or serious burns For your own safety turn the switch off and remove the plug from the power supply socket when carrying out any form of maintenance or cleaning If in doubt consult Draper Tools or an authorised service agent Welding power supply Component Check points Advisories Front panel Check if any components are damaged or loose Tighten or replace where necessary Front panel Check if ...

Страница 15: ...metal position with your hand etc In order to maintain the performance of this product over time regular checking is advised Inspect and clean the housing interior Remove any dirt dust or foreign matters Use compressed air without water dry air to blow accumulated detritus away Regular checking intervals should generally be conducted every 6 months However this should be extended to every 3 months...

Страница 16: ...unplug the power supply plug of the HF arc striking power supply If the fault indicator is still on it will indicate that some field effect tubes on the MOS plate are broken Find and replace them with ones of the same type If the fault indicator is off it will indicate that the voltage rise transformer in the HF arc striking circuit on the power supply plate is broken Replace The previous steps ha...

Страница 17: ...isuse careless or unsafe handling alterations accidents or repairs attempted or made by any personnel other than the authorised Draper warranty repair agent Note If the tool is found not to be within the terms of warranty repairs and carriage charges will be quoted and made accordingly This warranty applies in lieu of any other warranty expressed or implied and variations of its terms are not auth...

Страница 18: ......

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