Stealth digi-arc205stl User manual

IGBT INVERTER • DC MMA / LIFT TIG • WELDING MACHINE
Part No. 9023
DIGI-ARC205STL
OPERATING
INSTRUCTIONS
Suitable for
220~240V

SAFETY PRECAUTIONS
Follow these precautions carefully. Improper use of any welder can result in injury or death.
1. ONLY CONNECT MACHINE TO A POWER SOURCE FOR WHICH IT WAS DESIGNED.
THE SPECIFICATION PLATE ON THE MACHINE LISTS THIS INFORMATION. WHEN
WELDING OUTDOORS ONLY USE AN EXTENSION CORD INTENDED FOR SUCH USE.
2. ONLY OPERATE MACHINE IN DRY LOCATIONS AND ON CEMENT OR MASONRY FLOOR.
KEEP AREA CLEAN AND UNCLUTTERED.
3. KEEP ALL COMBUSTIBLES AWAY FROM WORK SITE.
4. DO NOT WEAR CLOTHING THAT HAS BEEN CONTAMINATED WITH GREASE OR OIL.
5. KEEP CABLES DRY AND FREE FROM OIL AND GREASE AND NEVER COIL AROUND
SHOULDERS.
6. SECURE WORK WITH CLAMPS OR OTHER MEANS – DON’T OVER-REACH WHEN
WORKING.
7. NEVER STRIKE AN ARC OVER A COMPRESSED GAS CYLINDER.
8. DON’T ALLOW THE INSULATED PORTION OF THE ELECTRODE HOLDER TO TOUCH
THE GROUND WHILE CURRENT IS FLOWING.
9. SHUT OFF POWER AND UNPLUG MACHINE WHEN REPAIRING OR ADJUSTING.
INSPECT BEFORE EVERY USE. ONLY USE IDENTICAL REPLACEMENT PARTS.
10. FOLLOW ALL MANUFACTURER’S RULES ON OPERATING SWITCHES AND MAKING
ADJUSTMENTS.
11. ALWAYS WEAR PROTECTIVE CLOTHING WHEN WELDING. THIS INCLUDES: LONG
SLEEVED SHIRT (LEATHER SLEEVES), PROTECTIVE APRON WITHOUT POCKETS, LONG
PROTECTIVE TROUSERS, BOOTS AND GLOVES WHEN HANDLING HOT MATERIALS.
12. ALWAYS WEAR A WELDER’S HELMET WITH PROTECTIVE EYE PIECE WHEN WELDING.
WEAR A PROTECTIVE CAP UNDERNEATH THE HELMET.
13. WHEN WELDING OVERHEAD, BEWARE OF HOT METAL DROPPINGS. ALWAYS PROTECT
THE HEAD, HAND, FEET AND BODY.
14. KEEP A FIRE EXTINGUISHER CLOSE BY AT ALL TIMES.
15. DO NOT EXCEED THE DUTY CYCLE OF THE MACHINE. THE RATED CYCLE OF A
WELDING MACHINE IS THE PERCENTAGE OF A TEN MINUTE PERIOD THAT THE
MACHINE CAN OPERATE SAFELY AT A GIVEN OUTPUT SETTING.
16. KEEP ALL CHILDREN AWAY FROM WORK AREA. WHEN STORING EQUIPMENT, MAKE
SURE IT IS OUT OF REACH OF CHILDREN.
17. GUARD AGAINST ELECTRIC SHOCK. DO NOT WORK WHEN TIRED. DO NOT LET BODY
COME IN CONTACT WITH GROUNDED SURFACES.
STEALTH DIGI-ARC205STL

Power Supply Voltage
No-load Voltage
Current Adjusting Range
Rated Output Current
Rated Duty Cycle
Weight
MMA
Protection Class of Enclosure
MODEL: DIGI-ARC205STL
1 MAIN USE AND RANGE
STEALTH DIGI-ARC205STL inverter arc machine is a welding machine incorporating
IGBT and features performance and high efficiency. The welding current is infinitely and
independently adjustable. All ferrous metal, copper and stainless steel material can be
omni-bearing welded in all positions. The machine has outstanding feature of minimum
welding current – up to 15A. Protection measures of the welder are excellent. The machine
is reliable, lightweight and easy to use. It is particularly suitable for plant and mine working,
build and maintenance sectors.
2 OPERATING CONDITION AND WORK SURROUNDING
2.1 OPERATING CONDITIONS
Voltage of power source: single phase AC 220/230/240V ± 10%
Frequency: 50/60Hz
Reliable grounding protection
2.2 WORK SURROUNDINGS
2.2.1 Relative humidity: ≤90% (average monthly temperature ≤20ºC)
2.2.2 Ambient temperature: –10ºC - 40ºC
2.2.3 The welding site should have no harmful gas, chemicals, moulds and
inflammable matter, explosive and corrosive medium.
2.2.4 Operating in rain is not allowed.
3 TECHNICAL SPECIFICATIONS
STEALTH DIGI-ARC205STL
74V
20-200A
200A
AC 220/230/240V (Single phase), 50/60Hz
35%
5.8kg
IP21S

STEALTH DIGI-ARC205STL
4 PRODUCT DESCRIPTION
• Before welding, the operator should read the operating instructions.
•Check the machine appearance for deformation and damage.
•For the safety of the equipment the operator must make an appropriate earth according
to the power supply system.
•The welding operation should be carried out in a dry and well ventilated area.
•Check the machine output connection.
•The machine should not be moved or the cover opened when the power is on and
during the welding operation.
•The machine should be maintained, operated and managed by a qualified person.
•Confirm the power source is single phase 240V ± 10% and distribution
board current is 5KVA.
•DO NOT connect with 380V power.
5 PANEL FUNCTION DIAGRAMS
FRONT PANEL BACK PANEL
1. Power switch
2. MMA/TIG switch
3. Protect indicating light
4. Current regulator
5. Output +
6. Output –
7. Current indicator
8. Cooling Fan
9. Incoming line of the power
10. Safety earthing column
connect the protection grounding of the welder.
d. Welding operation should be carried out in dry and good ventilating area. The
surrounding objects should be not less than 0.5m away from the welder.
e. Checking the welder output connector for tightness.
f. The welder can not be moved or the cover can not be opened during the power
is on and welding operation is carried out.
g. The welder should be cared,used and managed by specialized person.
±
h. Confirming that the power source is single phase and 110V or 240V 10%. Current
of the distribution board: 5KVA .
It can not be connected with 380V power absolutely.
5. SKETCH OF THE PANEL FUNCTION
FRONT PANEL BACK PANEL
1. power switch 2. MMA/TIG switch 3. protect indicating light
4. current regulator 5. output"+" 6. output"-"
7. indication of current 8. fan 9.incoming line of the power
10.safety earthing column
6.METHOD OF THE OPERATION
6-1. hand welding with electrode(MMA)
①
.Put switch"2" (MMA/TIG switch) onto the position "MMA".
Selecting empiric formula: I=40*d ,d is dia. of the electrode.
②Notice positive and negative connection during welding.
A negative connection B positive connection
8
19
7
+
-
●
2
3
4
5
6
+
-
HOLDER
WORKPIECE
+
-
HOLDER
WORKPIECE
10

STEALTH DIGI-ARC205STL
6 MACHINE OPERATION
6.1 HAND WELDING WITH ELECTRODE (MMA)
6.1.1 Put switch 2(MMA/TIG switch) to position MMA.
6.1.2 Select empiric formula: I = 40*d, d is diameter of the electrode.
6.1.3 Note positive and negative connection during welding.
A – Negative connection B – Positive connection
connect the protection grounding of the welder.
d. Welding operation should be carried out in dry and good ventilating area. The
surrounding objects should be not less than 0.5m away from the welder.
e. Checking the welder output connector for tightness.
f. The welder can not be moved or the cover can not be opened during the power
is on and welding operation is carried out.
g. The welder should be cared,used and managed by specialized person.
±
h. Confirming that the power source is single phase and 110V or 240V 10%. Current
of the distribution board: 5KVA .
It can not be connected with 380V power absolutely.
5. SKETCH OF THE PANEL FUNCTION
FRONT PANEL BACK PANEL
1. power switch 2. MMA/TIG switch 3. protect indicating light
4. current regulator 5. output"+" 6. output"-"
7. indication of current 8. fan 9.incoming line of the power
10.safety earthing column
6.METHOD OF THE OPERATION
6-1. hand welding with electrode(MMA)
①
.Put switch"2" (MMA/TIG switch) onto the position "MMA".
Selecting empiric formula: I=40*d ,d is dia. of the electrode.
②Notice positive and negative connection during welding.
A negative connection B positive connection
8
19
7
+
-
●
2
3
4
5
6
+
-
HOLDER
WORKPIECE
+
-
HOLDER
WORKPIECE
10
6.2 DC ARGON ARC WELDING (LIFT TIG)
6.2.1 Put switch 2(MMA/TIG switch) onto the position TIG.
6.2.2 Connect gas inlet pipe of the welding torch to argon bottle.
6.2.3 Test gas: open the argon bottle and turn on the flow meter, select suitable argon
flow.
6.2.4 Regulating the current knob 4. Select suitable welding current according
to thickness of the workpiece to be welded.
6.2.5 When the welding operation is finished, turn off argon bottle and cut off input
power to the machine.
7. SYSTEMATIC BLOCK DIAGRAM
8. TROUBLES AND PROBLEM SOLVING
+
Input
Rectifier
&Filter
Inverse
Circuit
55KHz
output
Rectifier
&Filter
single
phase
AC INPUT -
Control Circuit
trouble causes problem solving
power lamp is not lit 1. No electricity at input
2. switch of welder power fails
1. Checking incoming line
2. Replace the switch
Fan not rotating
1. Fan power line is off
2. Enclosure blocks the fan
due to deformation
3.The fan fails
4. Welder fails
1. Reconnect the line
2. reform the enclosure
3. replace
4. Maintenance in manufactu
rer or service center
Warning lamp lights
No output of welder
1. Overheat protection
2. Short interval of welder
switching on and off
3. Short between output + and
output - or Welding electrode
sticking on the workpiece
4.Welder fails
1. Welding after cools
2. Extending on-off time
3. move electrode
4.Maintenance in manufactur
er or service center
Output current
decreased
1. Input voltage is low
2. Input line is too thin
1. AC voltage
stabilizer(over 5KVA)
2. Power line is thickened
Current can not be
regulated
1. Connecting line of the
potentiometer is off
2. Potentiometer for current
regulation fails
1. Reconnecting the line
2. Replace potentiometer
7 SYSTEMATIC DIAGRAM