Jefferson TP Series User manual

I
TP SERIES
Inverter DC Pulsed TIG /MMA Arc Welding Machine

CONTENT
II
CONTENT
§1 SAFETY .............................................................................................................................................1
§1.1 SIGNAL EXPLANATION -----------------------------------------------------------------------------------------1
§1.2ARC WELDING DAMAGE---------------------------------------------------------------------------------------1
§1.3THE KNOWLEDGE OF ELECTRIC AND MAGNETIC FIELDS -------------------------------------------------4
§2 SUMMARY........................................................................................................................................5
§2.1 BRIEF INTRODUCTION -----------------------------------------------------------------------------------------5
§2.2WORKING PRINCIPLE-------------------------------------------------------------------------------------------6
§2.3VOLT-AMPERE CHARACTERISTIC ----------------------------------------------------------------------------6
§3 INSTALLATION AND ADJUSTMENT..........................................................................................7
§3.1 PARAMETERS ----------------------------------------------------------------------------------------------------7
§3.2 DUTY CYCLE &OVER HEAT-----------------------------------------------------------------------------------7
§3.3 POLARITY CONNECTION ---------------------------------------------------------------------------------------8
§3.3.1 MMAOPERATION...................................................................................................................8
§3.3.2ASSEMBLING THE EQUIPMENT (TIG)......................................................................................8
§4 OPERATION ...................................................................................................................................10
§4.1 LAYOUT FOR THE FRONT PANELAND THE REAL PANEL (TAKE TP-1600 FOR AN EXAMPLE)-------- 10
§4.2 LAYOUT FOR THE FRONT PANEL ---------------------------------------------------------------------------- 14
§4.3WELDING OPERATION---------------------------------------------------------------------------------------- 15
§4.3.1ARGON ARC WELDING OPERATION ......................................................................................15
§4.3.2 STRIKING ARC WAY FOR MMA.............................................................................................17
§4.3.3 MANIPULATION OF ELECTRODE............................................................................................18
§4.4WELDING PARAMETERS ------------------------------------------------------------------------------------- 18
§4.4.1 JOINT FORMS IN TIG/MMA..................................................................................................18
§4.4.2THE EXPLANATION OF WELDING QUALITY............................................................................18
§4.4.3TIG PARAMETERS MATCHING..............................................................................................19
§4.4.4 ELECTRODE SELECTION........................................................................................................20
§4.5 OPERATION ENVIRONMENT --------------------------------------------------------------------------------- 21
§4.6 OPERATION NOTICES----------------------------------------------------------------------------------------- 21
§5 MAINTENANCE & TROUBLESHOOTING..............................................................................22
§5.1 MAINTENANCE------------------------------------------------------------------------------------------------ 22
§5.2TROUBLESHOOTING ------------------------------------------------------------------------------------------ 23
§5.3 ELECTRICALPRINCIPLE DRAWING-------------------------------------------------------------------------- 26

SAFETY
1
§1 SAFETY
§1.1 Signal Explanation
The above signals mean warning! Notice! Running parts and getting an electric shock or thermal
parts will take damage for your body or others. The corresponding notices are as follows. It is
quite a safe operation after taking several necessary protection measures.
§1.2 Arc Welding Damage
The following signals and word explanations are to some damages for your body or others
happening on the welding operation. While seeing these, please remind of yourself or others to be
dangerous.
Only ones who are trained professionally can install, debug, operate, maintain and repair the
equipment.
During the operation, non-concerned people should be lift, especially for children.
After shut off the machine power, please maintain and examine the equipment according to §5
because of the DC voltage existing in the electrolytic capacitors.
ELECTRIC SHOCK CAN KILL.
Never touch electrical parts.
Wear dry, hole-free gloves and clothes to insulate yourself.
Insulate yourself from workpiece and ground using dry insulation. Make certain the insulation
is large enough to cover your full area of physical contact with workpiece and ground.
Take carefully when using the equipment in small place, falling-off and wet circumstance.
Never close the machine power before installation and adjustment.
Ensure to install the equipment correctly and ground the work or metal to be welded to a good
electrical (earth) ground according to the operation manual.
The electrode and work (or ground) circuits are electrically “hot” when the welder is on. Do not
touch these “hot” parts with your bare skin or wet clothing. Wear dry, hole-free gloves to insulate
hands.
In semiautomatic or automatic wire welding, the electrode, electrode reel, welding head, nozzle
or semiautomatic welding gun are also electrically “hot”.

SAFETY
2
Always be sure the work cable makes a good electrical connection with the metal being welded.
The connection should be as close as possible to the area being welded.
Maintain the electrode holder, work clamp, welding cable and welding machine in good, safe
operating condition. Replace damaged insulation.
Never dip the electrode in water for cooling.
Never simultaneously touch electrically “hot” parts of electrode holders connected to two
welders because voltage between the two can be the total of the open circuit voltage of both
welders.
When working above floor level, use a safety belt to protect yourself from a fall should you get a
shock.
FUMES AND GASES CAN BE DANGEROUS.
Welding may produce fumes and gases hazardous to health. Avoid breathing these fumes and
gases. When welding, keep your head out of the fume. Use enough ventilation and/or exhaust at
the arc to keep fumes and gases away from the breathing zone. When welding with electrodes
which require special ventilation such as stainless or hard facing or on lead or cadmium plated
steel and other metals or coatings which produce highly toxic fumes, keep exposure as low as
possible and below Threshold Limit Values using local exhaust or mechanical ventilation. In
confined spaces or in some circumstances, outdoors, a respirator may be required. Additional
precautions are also required when welding on galvanized steel.
Do not weld in locations near chlorinated hydrocarbon vapors coming from degreasing, cleaning
or spraying operations. The heat and rays of the arc can react with solvent vapors to form
phosgene, a highly toxic gas, and other irritating products.
Shielding gases used for arc welding can displace air and cause injury or death. Always use
enough ventilation, especially in confined areas, to insure breathing air is safe.
Read and understand the manufacturer’s instructions for this equipment and the consumables to
be used, including the material safety data sheet and follow your employer’s safety practices.
ARC RAYS CAN BURN.
Use a shield with the proper filter and cover plates to protect your eyes from sparks and the rays
of the arc when welding or observing open arc welding.
Use suitable clothing made from durable flame-resistant material to protect your skin and that of
your helpers from the arc rays.
Protect other nearby personnel with suitable, non-flammable screening and /or warn them not to
watch the arc nor expose themselves to the arc rays or to hot spatter or metal.
SELF-PROTECTION
Keep all equipment safety guards, covers and devices in position and in good repair. Keep hands,

SAFETY
3
hair, clothing and tools away from V-belts, gears, fans and all other moving parts when starting,
operating or repairing equipment.
Do not put your hands near the engine fan. Do not attempt to override the governor or idler by
pushing on the throttle control rods while the engine is running.
DO NOT adds the fuel near an open flame welding arc or when the engine
is running. Stop the engine and allow it to cool before refueling to prevent spilled fuel from
vaporizing on contact with hot engine parts and igniting. Do not spill fuel when filling tank. If fuel
is spilled, wipe it up and do not start engine until fumes have been eliminated.
WELDING SPARKS can cause fire or explosion.
Remove fire hazards from the welding area. If this is not possible, cover them to prevent the
welding sparks from starting a fire. Remember that welding sparks and hot materials from welding
can easily go through small cracks and openings to adjacent areas. Avoid welding near hydraulic
lines. Have a fire extinguisher readily available.
Where compressed gases are to be used at the job site, special precautions should be used to
prevent hazardous situation.
When not welding, make certain no part of the electrode circuit is touching the work or ground.
Accidental contact can cause overheating and create a fire hazard.
Do not heat, cut or weld tanks, drums or containers until the proper steps have been taken to
insure that such procedures will not cause flammable or toxic vapors from substances inside. They
can cause an explosion even though they have been “cleaned”.
Vent hollow castings or containers before heating, cutting or welding. They may explode.
Sparks and spatter are thrown from the welding arc. Wear oil free protective garments such as
leather gloves, heavy shirt, cuff less trousers, high shoes and a cap over your hair. Wear ear plugs
when welding out of position or in confined places. Always wear safety glasses with side shields
when in a welding area.
Connect the work cable to the work as close to the welding area as practical. Work cables
connected to the building framework or other locations away from the welding area increase the
possibility of the welding current passing through lifting chains, crane cables or other alternate
circuits. This can create fire hazards or overheat lifting chains or cables until they fail.
Rotating parts may be dangerous.
Use only compressed gas cylinders containing the correct shielding gas for the process used and
properly operating regulators designed for the gas and pressure used. All hoses, fittings, etc.
should be suitable for the application and maintained in good condition.
Always keep cylinders in an upright position securely chained to an undercarriage or fixed
support.
Cylinders should be located:

SAFETY
4
-Away from areas where they may be struck or subjected to physical damage.
-A safe distance from arc welding or cutting operations and any other source of heat, sparks,
or flame.
Never allow the electrode, electrode holder or any other electrically “hot” parts to touch a
cylinder.
Keep your head and face away from the cylinder valve outlet when opening the cylinder valve.
Valve protection caps should always be in place and hand tight except when the cylinder is in
use or connected for use.
§1.3 The knowledge of Electric and Magnetic Fields
Electric current flowing through any conductor causes localized Electric and Magnetic Fields
(EMF). The discussion on the effect of EMF is ongoing all the world. Up to now, no material
evidences show that EMF may have effects on health. However, the research on damage of EMF
is still ongoing. Before any conclusion, we should minimize exposure to EMF as few as possible.
In order to minimize EMF, we should use the following procedures:
Route the electrode and work cables together – Secure them with tape when possible.
All cables should be put away and far from the operator.
Never coil the power cable around your body.
Make sure welding machine and power cable to be far away from the operator as far as possible
according to the actual circumstance.
Connect the work cable to the workpiece as close as possible to the area being welded.
The people with heart-pacemaker should be away from the welding area.

SUMMARY
5
§2 SUMMARY
This operation manual is suitable for the models of TP-1600, TP-2000.
§ 2.1 Brief Introduction
TP- series welding machine is an excellent DC pulsed TIG arc welder which adopts the latest
pulse width modulation (PWM) technology and insulated gate bipolar transistor (IGBT) inverter
technology, which can realize TIG operation and change work frequency to medium frequency so
as to replace the traditional hulking work frequency transformer with the cabinet medium
frequency transformer. Thus, it is characterized with portable, small size, light weight, low
consumption and etc.
TP- series welding machine has good performance: constant current output, fast response, HF
striking arc, and the welding current can be adjusted steplessly and pre-set (The method of lifting
arc can reduce the waste of tungsten electrode. Meanwhile, the welder has the function of long and
short welding, current up/down-slope, arc force, hot start and short-circuit protection etc.).
TP- series welding machines also have automatic protection functions with intelligent to
over-voltage, less-voltage, over-current, and over-heat. If any one of the above problems happens,
the alarm lamp on the front panel will be lighted and output current will be shut off automatically
to protect itself and prolong the equipment using life.
TP- series welding machine has MMA operation with hot start and arc force function. They
are suitable for all positions welding for various plates made of stainless steel, carbon steel,
alloyed steel, titanium, etc, which is also applied to pipe installment, mould mend, petrochemical,
architecture decoration, car repair, bicycle, handicraft and common manufacture.
TP- series Welder Characteristics：
★DC Pulsed TIGand MMA, adopt IGBT and advanced PWM technology ;
★High performance MCU, digital control, digital display;
★Preset all parameters with hold function;
★More simple and intuitionistic parameter adjustment;
★HF ignition, current down slope and up slope, gas pre-flow and post-flow;
★Intelligent protection: over-voltage, low-voltage, over-current, over-heat ;
★Wider voltage flexibility (220V±10%).
TIG——Tungsten Inert Gas welding;
MMA——Manual Metal Arc welding;
PWM——Pulse Width Modulation;
IGBT——Insulated Gate Bipolar Transistor;

SUMMARY
6
§2.2 Working Principle
The working principle of TP- series welding machines is shown as the following figure.
Single phase work frequency AC 220V or 230V (50 Hz) is rectified into DC (about 300V), then is
converted to medium frequency AC (about 20KHz) by inverter device (IGBT), after reducing
voltage by medium transformer (the main transformer) and rectifying by medium frequency
rectifier (fast recovery diode), and is outputted by inductance filtering. The circuit adopts current
feedback control technology to insure current output stably. Meanwhile, the welding current
parameter can be adjusted continuously and steplessly to meet with the requirements of welding
craft.
Rectify Inverter Medium
frequency
transformer
Medium
frequency
rectify Hall device
Current positive-
feedback control
Single-phase AC DC AC DC
220/230V,50HZ
AC DC
§2.3 Volt-Ampere Characteristic
TP- series welding machine has an excellent volt-ampere characteristic, whose graph is
shown as the following figure. The relation between the conventional rated loading voltage U2and
the conventional welding current I2is as follows:
When I2≤600A，U2=10+0.04I2(V); When I2＞600A,U2=34(V).
63
34
10
0600 I
2
（A）
U
2
（V）
Working
point
Volt-ampere characteristic The relation between the
conventional loading
voltage and welding current

INSTALLATION AND ADJUSTMENT
7
§3 Installation and Adjustment
§3.1 Parameters
Model
TP-1600
TP-2000
Power Source
1~220V
±
10
％,
50/60Hz
Rated Input Power (KW)
3.3(TIG)/5.3(MMA)
4.7(TIG)/5.5(MMA)
Rated Input Current (A)
23(TIG)/34(MMA)
31(TIG)/36.5(MMA)
Power Factor
0.8
Duty Cycle（40℃，10
minutes）
TIG
MMA
TIG
MMA
25
％
160A
160A
200A
30
％
170A
60
％
100A
100A
130A
130A
100
％
80A
80A
100A
100A
Max no-load Voltage(V)
58
63
Welding Current(Peak Current) Range(A)
5~160 5~200(TIG)/5~170(MMA)
Base Current Range (A)
5~160
5~200
Start Current Range(A)
5~160
5~200
Crater Current Range(A)
5~160
5~200
Pulse Frequency Range(Hz)
0.5~100
Pulse Width Range (
％
)
5~100
Up Slope Time(S)
0~5.0
Down Slope Time (S)
0~5.0
Pre Flow(S)
0~1.0
Post Flow(S)
3.0~10.0
Efficiency (
％
)
≥
80
Protection class
IP23
Insulation class
F
Weight (Kg)
7.5
8
Dimensions of Machine (mm)
（
L
×
W
×
H
）（
mm
）
400*140*230
§3.2 Duty cycle & Over heat
The letter “X” stands for duty cycle, which is defined as the proportion of the time that a
machine can work continuously within a certain time (10 minutes). The rated duty cycle means the
proportion of the time that a machine can work
continuously within 10 minutes when it outputs the rated
welding current.
The relation between the duty cycle “X” and the
output welding current “I” is shown as the right figure.
If the welder is over-heat, the IGBT over-heat
protection unit inside it will output an instruction to cut
output welding current, and brighten the over-heat pilot
lamp on the front panel. At this time, the machine should be relaxed for 10 minutes to cool the fan.
When operating the machine again, the welding output current or the duty cycle should be reduced
I( A)
0
100
%
25%
80 160
X
100
60%
The relation between duty cycle and
welding current for TP-1600

INSTALLATION AND ADJUSTMENT
8
§3.3 Polarity Connection
§3.3.1 MMAoperation
●Choosing the connection of DCEN or DCEP according to the arc stable burning condition.
The different electrodes need different connection method. Please refer to the electrode
manual.
●Put the ‘welding mode selection switch’ of the front panel on MMA shelf before doing
MMA welding.
§3.3.2Assembling the equipment (TIG)
Ar
workpiece
DCEN
torch
front panel
Argon gas
bottle Gas hose Shield
gas input
joint
gas
connecto
rAero
socket
Return current
cable
Control cable of
torch switch
pipe
Negative
output
Positive
output
Welding
cable
TP 1600 TP 1600
rear
panel
Workpiece is connected to the positive electrode of welding machine, and welding torch is
connected to the negative electrode, which is called DC POSITIVE CONNECTION;
otherwise, that is called DC NEGATIVE CONNECTION. Generally, it is usually operated in
Front panel
workpiece
electrode
DCEN
Welding holder
Front panel
workpiece
Welding holder
electrode
DCEP

INSTALLATION AND ADJUSTMENT
9
DC POSITIVE CONNECTION in TIG welding mode.
Packing list, such as welding torch、ground cable、gas hose, please refer to packing list in
details.
Those two pipe holder in packing list are used to connect strength pipe with argon gas bottle
and shield gas connector.
The control cable of torch switch consists of 2 wires, and the aero socket has 3 leads. Refer to
electrical principle drawing for detailed connection.
Consumable parts for TIG torch, such as tungsten electrode、tip、gas nozzle、electrode
shield(short/long) , please enquire us by mail or phone according to the accessory codes.
When TP- series welding machines are operated in HF ignition method, the ignition spark
can cause interferences in equipment near the welding machine. Be sure to take specially
safety precautions or shielding measures.
Put the ‘welding mode selection switch’ on front panel in 4T shelf or 2T shelf before doing
TIG welding.
It is better for the welding cable not to exceed 20M.

INSTALLATION AND ADJUSTMENT
10
§4 Operation
§4.1 Layout for the front panel and the rear panel (take TP-1600
for an example)
MMA
GAS
2T HF
4T HF
2T LIFT
4T LIFT
15 14
13
12
11
10
123
4
5
6
7
8
9
DISPLAY
DC TIG PULSE WELDER
HOT
START
ARC
FORCE
SELECTION
f
TP-1600
Welding mode
selection switch
Selection
knob
Ⅰ、Introduction the pilot light of TP-1600 operation panel：
⒈——Pre Flow Time (L1)
⒉——Start Current (L2)
⒊——Up Slope Time (L3)
⒋——Welding Current (Peak Current) (L4)
⒌——Base Current (L5)
⒍——Pulse Frequency (L6)
⒎——Pulse Width (L7)
⒏——Down Slope Time (L8)
⒐——Crater Current (L9)
⒑——Post Flow Time (L10)
⒒——Pulse Selection light (L11)
⒓——Hot Start (L12)
⒔——Arc Force (L13)
⒕——Alarm Pilot Light (L14)
⒖——Power Pilot Light (L15)
Ⅱ、The function of ‘welding mode selection switch’:
⒈GAS——Gas test function; In GAS shelf, the gas is given all the time and the welding
is stopped.
⒉4T_LIFT——TIG Lifting arc, long welding function.
⒊2T_LIFT——TIG Lifting arc, short welding function.
⒋4T_HF——TIG HF striking arc, long welding function.
⒌2T_HF——TIG HF striking arc, short welding function.
⒍MMA——MMA function.
Ⅲ、Operations:
1. MMA parameters adjustment
Adjust the ‘welding mode selection switch’ to MMA function. In MMA mode, only three
parameters (welding current, hot start, arc force) can be adjusted.
MMA parameters adjustment: Turn on the welder, the welding current can be adjusted
directly; If adjust the selection knob, the welding current LED (L4) and the digital scale display

OPERATION
11
are twinkling; It means the welding current can be adjusted. If the adjustment is completed,
confirm the parameter by pressing the ‘selection knob’ or the system will confirm the parameter
automatically after 3 seconds.
Other parameters such as arc force adjustment: press the‘selection knob’； Adjust the
‘selection knob’and select the arc force LED(L13 is on); Press the‘selection knob’again, the arc
force LED(L13) and digital scale display are twinkling; It means the arc force can be adjusted. If
the adjustment is completed, press the‘selection knob’and confirm the parameter; Or the system
will confirm the parameter automatically after 3 seconds. Operation flow as follows:
Step one: ‘Welding mode selection switch’selects MMA mode, press the ‘selection knob ’;
Step two: Adjust the‘selection knob’and select the arc force LED(L13 is on); Press the
‘selection knob’again, the arc force LED(L13) and digital scale display are twinkling; It means
the arc force can be adjusted.
Step three: If the adjustment is completed, press the‘selection knob’and confirm the
parameter; Or the system will confirm the parameter automatically after 3 seconds.
⒉TIG parameters adjustment
Adjust ‘welding mode selection switch’to TIG mode. If in TIG 4T mode and the output pulse
function is turned on, all parameters (L1~L11) of TIG can be adjusted. If in TIG 2T mode and the
output pulse function is turned on, the start current and crater current is 5A; If the pulse function is
closed, the parameter of base current(L5), pulse frequency(L6) and pulse width(L7) can not be
adjusted.
TIG parameters adjustment: The welding current (L4) can be adjusted directly when the
welder is tune on. Adjust the ‘selection knob’, the welding current LED (L4) and the digital scale
display are twinkling; It means the welding current can be adjusted. If the adjustment is
completed, confirm the parameter by pressing the ‘selection knob’ or the system will confirm the
parameter automatically after 3 seconds.
Other parameters adjustment: Take ‘pre flow time’ for an example. Press the ‘selection knob’;
Adjust the‘selection knob’and select the pre flow time LED (L1 is on); Press the ‘selection knob’
again, the pre flow time LED (L1) and digital scale display are twinkling; It means the pre flow
time can be adjusted. If the adjustment is completed, confirm the parameter by pressing the
Welding mode
selection switch
select MMA
Press the
‘selection
knob’
Adjust the ‘selection knob’ and
select the arc force LED (L13 is
on); Press the ‘selection knob’
again, the arc force LED (L13)
and digital scale display are
twinkling; It means the arc force
value can be adjusted.
If the adjustment is completed,
press the‘selection knob’and
confirm the parameter; Or the
system will confirm the
parameter automatically after 3
seconds.

OPERATION
12
‘selection knob’; or the system will confirm the parameter automatically after 3 seconds.
Operation flow as follows:
Step one: ‘Welding mode selection switch’select TIG 4T or 2T. Press the ‘selection knob’;
Step two: Adjust the‘selection knob’and select the pre flow time LED (L1 is on); Press the
‘selection knob’ again, the pre flow time LED (L1) and digital scale display are twinkling; It
means the pre flow time can be adjusted.
Step three: If the adjustment is completed, confirm the parameter by pressing the ‘selection
knob’; or the system will confirm the parameter automatically after 3 seconds.
Output pulse selection: Press the ‘selection knob’.Adjust the‘selection knob’and select the
pulse LED (L11 is on); press the ‘selection knob’ again, the pulse LED (L11) and digital scale
display are twinkling; It means the output pulse function can be turned on or turned off. If the
digital scale display is “ON”, the output pulse function is turned on; if the digital scale display is
“OFF”, the output pulse function is turned off. When the pulse LED (L11) and digital scale
display are twinkling, press the ‘selection knob’ again, the output pulsed conditions transform by
“ON” into “OFF” or transform by “OFF” into “ON”. Operation flow as follows:
Step one: ‘Welding mode selection switch’select TIG 4T or 2T. Press the ‘selection knob’;
Step two: Adjust the‘selection knob’and select the output pulse LED (L11 is on); press the
‘selection knob’ again, the pulse LED (L11) and digital scale display are twinkling; It means the
output pulse function can be turned on or turned off.
Select TIG 4T or 2T
Press the ‘selection
knob’
Adjust the ‘selection knob’ and
select the pre flow time LED (L1 is
on); Press the ‘selection knob’
again, the pre flow time LED (L1)
and digital scale display are
twinkling; It means the pre flow
time can be adjusted
If the adjustment is complete,
confirm the parameter by
pressing the ‘selection knob’;
or the system will confirm the
parameter automatically after
3 seconds
Select TIG 4T or 2T
Press the ‘selection knob’

OPERATION
13
Step three: Press the ‘selection knob’ again, the output pulsed conditions transform by “ON”
into “OFF” or transform by “OFF” into “ON”.
Complete the adjustment after 3 seconds, the operation panel will return to original condition;
welding current LED (L4) is on. If the welding mode is TIG and the output pulse function is
turned on, the pulse pilot light (L11) is on. If the output pulse function is turned off, the pulse pilot
light (L11) is off. In MMA mode, the pulse pilot light (L11) is off. All preset parameters with hold
function.
Adjust the
‘
selection knob
’
and
select the pulse pilot LED (L11 is
on); Press the ‘selection knob’
again, the pulse pilot LED (L11)
and
digital scale display are
twinkling;
It means the output
pulse function can be turned on or
turned off.
Press the
‘selection knob’
again, the output pulse function
is turned off.

OPERATION
14
§4.2 Layout for the front panel
GAS
MMA
4T LIFT
2T LIFT
4T HF
2T HF
65
4
3
2
1
TP-1600
f
SELECTION
ARC
FORCE
HOT
START
DC TIG PULSE WELDER
DISPLAY
1．Front panel
2．Operation panel
3．Shield gas connector is connected to the gas input pipe of torch.
4．Connector the welder’s negative polarity output.
5．Aero socket is connected to torch switch control wire (3 leads).
6．Connector The welder’s positive polarity output.

OPERATION
15
§4.3 Welding Operation
§4.3.1 Argon Arc Welding Operation
TIG long welding（4T）：
t( s)
0
I( A)
Loosen the
switch
t1 t5 t7
Striking success
Stop arc
t3 t4
Base current setting
value
t2 t6
Loosen the
switch
Repress down the
switch
Start
current Crater
current
Welding current (peak
current) setting value
Press and hold the
welding gun switch
Introduction：
0：Press and hold the gun switch, Electromagnetic gas valve is turned on. The
shielding gas starts to flow;
0～t1：Pre flow time, adjustment range of pre flow time :0~1.0S;
t1：Striking success, adjustment range of start current: 5~160A（200A）；
t2：Loosen the gun switch, the output current slopes up from start current; if the output
pulse function is turned on, the output current is pulsed;
t2～t3：Output current slopes up to the setting current value; adjustment range of up slope
time 0~5.0S ;
t3～t4：Welding process. During this period, the gun switch is loosen;
Note: If the output pulse function is turned on, the output current is pulsed. If the output pulse
function is turned off, the output current is DC current;
t4：Repress down the gun switch, the output current slopes down to crater current; if the
output pulse function is turned on, the slope down current is pulsed;
t4～t5：Down slope time, adjustment rang of down slope time: 0~5.0S;
t5～t6：Crater current holds time; adjustment range of crater current: 5~160A (200A);
t6：Loosen the gun switch, stop arc, and keep on argon flowing;
t6～t7：Post flow time, adjustment range of post flow time: 3.0～10.0S;
t7：Electromagnetic valve is closed and stop argon flowing. Welding is finished.

OPERATION
16
TIG short welding（2T）：
t( s)
0
I( A)
Loosen the
welding gun
switch
Press and hold the
welding gun switch
t1 t5
Striking
success Stop arc
t3 t4
Base current setting
value
t2
Welding current (peak
current) setting value
5A
Introduction：
0：Press and hold the gun switch, Electromagnetic gas valve is turned on. The
shielding gas starts to flow;
0～t1：Pre flow time, adjustment range of pre flow time :0~1.0S;
t1～t2：Striking success, the output current slopes up to the setting current from minimum
current (5A); if the output pulse function is turned on, the slope up current is pulsed;
t2～t3：During the whole welding process, the gun switch is pressed and held without
releasing;
Note: If the output pulse function is turned on, the output current is pulsed. If the output pulse
function is turned off, the output current is DC current;
t3：Loosen the gun switch, the output current slopes down; if the output pulse function
is turned on, the slope down current is pulsed;
t3～t4：The output current slopes down to minimum current (5A), stop arc; adjustment
range of down slope time: 0~5.0S;
t4～t5：Post flow time, adjustment range of post flow time: 3.0～10.0S;
t5：Electromagnetic valve is closed and stop argon flowing. Welding is finished.
The operation step of lifting arc:
1. Touch the tungsten electrode with workpiece.
2. Press the welding gun.
3. Lift the welding gun and strike arc.

OPERATION
17
Output protect function:
In MMA mode, the no-load voltage is 20V; when the welding is beginning, the output
voltage will rise to welding voltage immediately. When the welding is finished, the output voltage
will drop to 20V.
Parameter storage function:
All preset parameters will be held.
Short circuit protect function：
①TIG_LIFT 4T or 2T: If the tungesten electrode touches the workpiece when welding, the
current will drop to 20A, which can reduce the tungsten spoilage farthestly，prolong the using life
of the tungsten electrode，and prevent tungsten clipping.
②TIG_HF 4T or 2T: If the tungesten electrode touches the workpiece when welding, the
current will drop to 0 within 1second, which can reduce the tungsten spoilage farthestly，prolong
the using life of the tungsten electrode，and prevent tungsten clipping.
③MMA: If the electrode touches workpiece over two seconds, the welding current will drop to
0 automatically to protect the electrode.
Automatically purify gas function:
When TIG welding, turn on the welder and the gas valve is open to output shield gas and
maintain 10 seconds. Eliminate the air and purify the shield gas of the pipe.
§4.3.2 Striking arc way for MMA
Knocking arc: take the electrode upright to touch the workpiece, after forming short circuit,
quickly lift up about 2~4 mm, and arc will be ignited. This method is difficult to master. But
in the welding for the brittle or hard steel, it is better to use knocking way.
electrode
workpiece
electrode electrode
workpiece workpiece
Take the electrode upright The Electrode touch the workpiece Lift up for about 2-4mm
upright
up
touch
2～4mm
Lifting arc: take the electrode to scrape the workpiece for striking arc. But it may cause the
arc scratch, so must to lift arc in the groove.

OPERATION
18
electrode
workpiece
electrode electrode
workpiece workpiece
Scrape the workpiece for
strinking arc Electrode touch workpiece Lift up for about 2-4mm
scrape
up
touch
2~4mm
§4.3.3 Manipulation of electrode
In MMA welding, there are three
motions to being matched in the end
of electrode: the electrode moving to
the molten pool along axes; the
electrode swing right and left; the
electrode moving along welding way.
The operator can choose the
manipulation of electrode based on
welding joint sharp, welding position,
electrode spec, welding current and
operation skill, etc.
The details please refer to《Welding Dictionary》P69, Volume 1 of Edition 2.
§4.4 Welding Parameters
§4.4.1 Joint forms in TIG/MMA
§4.4.2 The explanation of welding quality
The relation of welding area color & protect effect of stainless steel
Welding area
color
argent , golden blue red-grey grey black
a butt joint b lap joint c coner joint d T joint
electrode
workpiece
weld
1
2
3
2
1-electrode moving; 2-the electrode swing right & left; 3-the electrode move along weld