Reboot RBM-1550 User manual

Version Number: RBM1550-20210414A1
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Operation Manual
Reboot RBM-1550 welding machines adopts the latest pulse width modulation (PWM) technology and insulated
gate bipolar transistor (IGBT) power module, which can change work frequency to medium frequency so as to
replace the traditional Transistor transformer with the medium frequency transformer. its characterized with portable,
small size, light weight, low consumption and etc. It is also an intelligent and easy-to-operate multi-function welding
machine with MMA, MIG GAS, MIG GASLESS and LIFT TIG. It has the characteristics of strong welding
performance and diversified usage scenarios. It can be used in both gas and gasless conditions, and the welding
effect is excellent. It is highly praised by welding enthusiasts. It is also very friendly to beginners in welding and can
quickly get started.
Part 1: Machine Introduction
1. MIG/MMA/LIFT TIG function selection.
2. Current display meter.
Digital ammeter is used to display preset current and
actual output current.
3. 220V, voltage input indicator light.
4. 110V, voltage input indicator light.
5. Fault light, overheating and overcurrent protection
light.
6. Spool gun and MIG gun switch
7. Small range voltage adjustment
It is recommended that the voltage does not need to
Be adjusted. The machine is a unified machine. The
voltage, current and wire feeding speed are
automatically matched. Only when the deviation is
too large, it can be adjusted
appropriately.
8. Adjust the current and wire feed speed knob
Turn clockwise to increase the current, turn
counterclockwise to decrease the current.
9. MIG welding torch connector
10. Spool gun control socket
11. Positive terminal
Positive Terminal. Welding current flows from the power source via heavy duty bayonet type terminals. It
is essential, however,that the male plug is inserted and turned securely to achieve a sound electrical
connection.
12. Polarity conversion socket.
13. Negative terminal
Welding current flows from the power source via heavy duty bayonet type terminals. It is essential,
however, that the male plug is inserted and turned securely to achieve a sound electrical connection。
14. Polarity slection plug
In MMA and LIFT TIG state, this plug does not need to be connected; in MIG gas welding state, this plug
is connected to positive terminal 11; in MIG airless welding state, this plug is connected to negative
terminal 13.

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Part 2: Introduction to the product and configuration list
No.
Picture
Name
Qty
Remark
1
RBM-1550
1
Please check outside of the whole machine no
scratch and break , it can power on normally.
2
MB15
welding
torch
1
3M, MB 15 MIG welding torch, European central
plug.
3
Welding
holder
1
2m 16MM2 cable, 300A copper American welding
holder +10-25mm2 European quick plug.
4
Ground
clamp
1
2m 16MM2 cable, 300A Ground clamp
+10-25mm2 European quick plug.
5
Conversion
line
1
Conversion line only suit for 220V to 110V
dual-voltage input machines, if not dual- voltage
machines no this line included.
6
Transparent
hose
1
2.5m black tracheaD5.5*12MM, with American gas
connectors at both ends, the model of the
connector is:5/8-18UNF.
7
Brush and
hammer
1
Clean up welding slag.
8
Simple
mask
1
Welding protection.
9
Conductive
tip0.8
3
Spare parts, need to be replaced frequently,
please keep inventory.

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10
Porcelain
nozzle
3
For flux-cored welding wire,Spare parts need to be
replaced frequently, please keep inventory.
11
Wire feed
wheel
1
V-shaped wire feed wheel adapts to solid welding
wire 0.8mm/1.0mm.
12
Wire feed
wheel
1
The gear wire feed wheel is suitable for flux-cored
welding wire diameter 0.8mm/1.0mm, installed on
the machine.
13
Flux cored
wire
1
1KG diameter 0.8mm 0,030", suitable for gasless
MIG welding, consumables should be replaced in
time, please keep in stock.
14
Manual
1
Normally provides manuals in English, if you need
other language like French, German, Italian,
Spanish, and Russian please contact us to get
electronic version documents.
Part 3: Simple test for powering on the machine
Reboot RBM-1550 Welding machines will be subjected to strict various tests when they leave the factory to
ensure that each welding machine that reaches the user is of high quality, because our machine has to go through
tens of thousands of kilometers of long-distance transportation from the factory to the delivery to you. It’s inevitable
that some uncontrollable factors will cause some internal components of the machine to become loose or even
damaged in the process. We recommend that you check the external device as soon as you get the welder, and turn
on the power to check to ensure that you receive It is a qualified product.
Precautions for power-on inspection:
1、Please make sure that the output voltage of your power supply is 110V+-15% or 220+-15%. Reboot RBM-1550D
supports 110V and 220V input voltage in North America and Japan, and only supports 220V input voltage in other
places; if you are powered by a generator, Please make sure that the generator is not less than 5000w.
2、It is recommended to choose 30A circuit breaker protection when input voltage is AC 220V.
3、Please choose the power plug that suits your local electrical law requirements.
4、Extension cord: #12 AWG or larger; 25’ (8m) or shorter.
Turn on the power switch of the machine and the fan on the back of the machine rotates, and the digital
display on the panel indicates that the power is normal.
Note:
1) The digital display shows irregular changes at the beginning, and then returns to the digital display after 3
seconds, which is normal.

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2) In order to reduce the working temperature of the machine, it is normal for the fan to continue to rotate for a
few seconds after the power is turned off.
3) During high-strength continuous welding, machine protection may occur. After continuous heat dissipation, the
machine will return to normal, which is normal.
Attached table: Self-examination of abnormal conditions without response when turning on the machine:
1. The machine's power switch is not turned on.
2. The power input voltage is wrong.
3. The power plug is loose.
4. The internal circuit is loose (due to long-distance transportation, bumps), you need to open the cover and
check the internal connection line.
Part 4: Technical specifications
TYPE
RBM1550D
RBM1550D
RBM1500
Input power voltage (V)
1phase AC110V，50/60Hz
1phase220V，50/60Hz
1phase220V，50/60Hz
Rated input current (A)
45.1
30.6
30.6
Rated power capacity (KVA)
3.5
4.2
4.2
Current adjustment range (A)
mig:30-140 mma:30-140
mig:30-175 mma:30-140
mig:30-175 mma:30-140
Welding thickness (mm)
>1.0
>1.0
>1.0
Voltage adjustment range (V)
15-22
15-24
15-24
No-load voltage (V)
55±5
55±5
55±5
Electrode diameter (mm)
0.8/1.0
0.8/1.0
0.8/1.0
Rated duty cycle
60%
60%
60%
Efficiency (%)
85%
85%
85%
Power factor
0.7
0.7
0.7
Protection class
IP21S
IP21S
IP21S
Insulation class
F
F
F
Size (mm)
540*310*350
540*310*350
540*310*350
Weight (Kg)
12.8
12.8
12.8
Part 5: Machine operation guidance.
Tips:
1. Wear a welding helmet fitted with a proper shade of filter to protect your face and eyes when welding or watching;
2. Wear approved safety glasses. Side shields recommended;
3. Use protective screens or barriers to protect others from flash and glare; warn others not to watch the arc;
4. Wear protective clothing made from durable, flame-resistant material(wool and leather) and foot protection;
5. Use approved ear plugs or ear muffs if noise level is high;
6. Never wear contact lenses while welding.
5.1 MMA mode

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If you want to repair some broken fences or fix brackets, you like to use traditional welding rods for operation,
you can use REBOOT RBM1600 MMA mode for welding.
1 Select “MMA” process.
2 Connect welding holder and ground clamp.
3 To adjust the current, Knob “A” only the current can be adjusted.
Note:
1) The welding rod specification supported by reboot RBM1600 is below 4.0(5/32in), usually 2.5(3/32in) and
3.2(1/8in). European style generally uses E6013, American style generally uses E7018, and stainless

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steel generally uses ER308.
2) It supports welding of 1-8mm(1/64-5/64in) carbon steel and 1-5mm(1/64-7/32in) stainless steel.
Aluminum can not be welded. For carbon steel, please use carbon steel electrode. For stainless steel,
please use stainless steel electrode.
3) Connect the ground clamp to clean bare metal. No rust, paint or other coatings, and ensure good
electrical conductivity.
4) The ideal distance between the welding rod and the welding object is 1-2mm(1/64-5/64in), to ensure that
the welding rod and the workpiece are in continuous and stable contact. The welding rod should not be
too high or pressed too low to avoid arc breaking and adhesion.
5) It is normal for novices to have adhesion during the welding process, and you can try to friction arc to
avoid adhesion.
6) Suitable for ordinary welding rods, such as 7018, 6013, etc., but not suitable for special welding rods,
such as 7010, 7011.
Possible problems
1) There is no arc, check the ground wire to connect the workpiece to ensure that there is no rust, paint or
other coatings on the workpiece.
2) There is no arc, check the direct distance between the welding rod and the welding object, the ideal
distance is 1-2 mm; check whether the welding object has rust or oil stains, it is recommended to polish
with sandpaper or a grinder.
3) When welding, the spatter is very big, and it feels very difficult to weld. Please try to change the polarity
connection of the ground wire clamp and the welding clamp with the machine.
4) During the welding process, if the time exceeds 3 minutes, overcurrent protection may occur. You need to
stop working for a few minutes, let the machine cool down for a period of time, and automatically
recover. If the air cools for more than 10 minutes, the machine does not automatically recover, please
shut down and restart.
5) If you have any problems that cannot be solved, please contact us at [e-mail] .
5.2 MIG mode
Reboot RBM-1550 provides two welding modes: gas shielded welding and self-shielded welding with fluxed
wire. If you are working at home or in a studio, in order to ensure a better welding effect, it is recommended that you
use the gas welding mode; if you need to go out to work, carry gas cylinders and other inconvenient situations, you
can use the Self-protected welding method.
A) Gas shielded welding mode
1.1 Select “MIG ” process
1.2 Solid wire welding setting (with gas)
Reboot RBM-1550 outstandingly supports 0.8 and 1.0 mm diameter welding wires, and automatically
and intelligently matches the best welding parameters according to different specifications of welding wires
to achieve the best welding results.
1. Use pure carbon dioxide gas protection

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2. Use mixed gas protection (usually a mixture of argon and carbon dioxide)
1.3 Connect MIG gun and ground clamp.

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1.4 Install wire spool
0.030”(0.8mm)/0.040”(1.0mm)diameter
4”（100mm 1kg）wire spool
1.5 Set drive roll

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Face the side marked 0.030” away from the machine.
Remarks:
1. There are two grooves on one wire feed wheel, one side is 0.030” (0.8mm) and the other
side is 0.040” (1.0mm) to match the corresponding wire diameter.
2. Gas welding requires the use of V-type wire feed wheels, which are suitable for
ordinary carbon steel welding wire and stainless steel welding wire, and need to use
CO2 gas or CO2 and Argon gas mixture.
1.6 Feed wire and set pressure
The pressure should not be too loose, too loose will cause the welding wire to slip and the wire feeding is
unstable, and too tight will cause the welding wire to slip and deform.
1.7 Connect to Input Power

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Please refer to the digital sign on the rear panel of the machine for the input voltage, the wrong voltage will
damage the machine. RBM1550 only has 230V voltage input, RBM1550D supports 110V or 220V voltage
input.
1.8 Please connect CO2 gas：
1) Attach gas hose to machine.
2) Attach hose and regulator to gas bottle.
1.9 Installation of welding torch.
The welding wire should be extended outside the European central socket, and then install the welding
torch. The wire guide tube and contact tip of the welding torch need to match the welding wire. Press and
hold the torch switch wrench for more than 3 seconds to not weld. This is fast wire feeding. Let the
welding wire be quickly delivered to the gun head.
1.10 Remove consumables and depress trigger until wire comes out. Replace

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consumables.
1.11 Adjust wire feed speed, current and voltage.
1. Select MIG, SPOOL GUN working status.
2. Function selection.
3. Choose the wire diameter of 0.8 and choose solid wire pure CO2 welding, Or choose 0.8mm welding
wire and mixed gas.
4. The machine is a unified machine, adjust this knob, current, voltage and wire feeding speed are
adjusted at the same time, and automatically match.
5. "V", for the unsatisfactory automatic adjustment of the machine, the voltage can be fine-tuned (with
the current and wire feeding speed unchanged).
1.12 With contact tip 1/4” from metal, depress trigger completely to initiate arc.
1.13 To replace the welding wire.

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Use the cutting pliers to cut off the front section of the contact tip that is more than the welding wire,
loosen the wire feed mechanism pinch wheel, rotate the welding wire reel clockwise, turn the welding wire
back to the wire feed reel, pay attention to pinch the welding wire with your right hand to avoid the wire
bounce.
1.14 Structure of welding gun

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Note: 1. Nozzle, 2. Conductive nozzle. They are wearing parts and need to be replaced frequently, please
keep inventory. 19. The guide wire tube, it is best to equip a spare part because it may damage the
accessories.
Note:
1) Please strictly follow the picture instructions to connect, otherwise it will not be possible to solder.
2) Solid core welding wire supports 0.8mm, 1.0mm, (The machine parameter setting is based on 0.8 solid
cored wire. If you are welding 1.0 solid cored wire, please adjust the voltage appropriately).
3) The machine can install and 1kg(2.2lb) wire reels.
4) The machine comes with a 1kg(2.2lb) flux-cored welding wire. This mode is not used. Solid welding wire
needs to be purchased separately.
5) Support welding material, carbon steel, stainless steel, aluminum can not be welded.
6) The diameter of the welding wire, the groove of the wire feed wheel and the aperture of the contact tip
must match.
7) The pressure roller of the wire feeding structure should not be too tight or too loose, which will cause the
wire feeding to be unstable.
8) The installation of the wire feeding reel should not be too loose or too tight, which will cause the welding
wire of the wire reel to spring off and the wire feeding is too slow.
Possible problems
1) There is no response when turning on the power, please check the plug connection.
2) There is no response when turning on the power, please open the cover and check whether the internal
connecting wires are loose.
3) The wire feeding is unstable. Please check the wire feeding reel and the wire feeding pressure roller,
and the welding gun should not be wound. Pay attention that the diameter of the welding wire matches
the wire feeding wheel groove and contact tip.
4) No wire feeding, please confirm that the working mode is MIG state, please confirm that the welding
gun is connected well, press the gun switch or no wire feeding, please contact us.
5) During the welding process, if the time exceeds 3 minutes, over-current protection may occur. You need
to stop working for a few minutes, let the machine cool for a period of time, and automatically recover. If
the air cools for more than 10 minutes, the machine does not automatically recover, please shut down
and restart.
6）If you have any questions, please contact us at [e-mail].

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B) Self-protection mode of flux-cored welding wire.
2.1 Select “MIG ” process.。
2.2 Set polarity for MIG Flux-cored（gasless）
Reboot RBM-1550 outstandingly supports 1.0 mm diameter welding wires, and automatically and intelligently
matches the best welding parameters according to different specifications of welding wires to achieve the best
results.
2.3 Connect MIG gun and ground clamp.
Flux-cored wire

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2.4 Install wire spool
0.030”(0.8mm)/0.040”(1.0mm)diameter
4”（100mm 1kg）wire spool
2.5 Set drive roll
Face the side marked 0.030” away from the machine
Remarks: 1. There are two grooves on one wire feed wheel, one side is 0.030” (0.8mm) and the other
side is 0.040” (1.0mm) to match the corresponding wire diameter.
2.Gear wire feed wheel, gear wire feed wheel is suitable for flux-cored welding wire, our
standard configuration has 1 piece of 1kg flux-cored welding wire, which can be directly installed
and used.
2.6 Feed wire and set pressure
The pressure should not be too loose, too loose will cause the welding wire to slip and the wire feeding is
unstable, and too tight will cause the welding wire to slip and deform.

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2.7 Connect to Input Power
Please refer to the digital sign on the rear panel of the machine for the input voltage, the wrong voltage
will damage the machine. RBM1550 only has 230V voltage input, RBM1550D supports 110V or 220V
voltage input.
2.8 Please connect CO2 gas：
1. Attach gas hose to machine.
2. Attach hose and regulator to gas bottle.

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2.9 Installation of welding torch.
The welding wire should be extended outside the European central socket, and then install the welding
torch. The wire guide tube and contact tip of the welding torch need to match the welding wire. Press and hold
the torch switch wrench for more than 3 seconds to not weld. This is fast wire feeding. Let the welding wire be
quickly delivered to the gun head.
2.10 Remove consumables and depress trigger until wire comes out. Replace consumables.
2.11 Be sure to use porcelain nozzles

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2.12 Adjust wire feed speed, current and voltage.
1. Select MIG, SPOOL GUN working status.
2. Function selection.
3. Choose the wire diameter of 1.0 and choose flux wire.
4. The machine is a unified machine, adjust this knob, current, voltage and wire feeding speed are adjusted at
the same time, and automatically match.
5. "V", for the unsatisfactory automatic adjustment of the machine, the voltage can be fine-tuned (with the
current and wire feeding speed unchanged).
2.13 With contact tip 1/4” from metal, depress trigger completely to initiate arc
2.14 To replace the welding wire.
Use the cutting pliers to cut off the front section of the contact tip that is more than the welding wire, loosen
the wire feed mechanism pinch wheel, rotate the welding wire reel clockwise, turn the welding wire back to the
wire feed reel, pay attention to pinch the welding wire with your right hand to avoid the wire bounce.

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2.15 Structure of welding gun
Note: 1. Nozzle, 2. Conductive nozzle. They are wearing parts and need to be replaced frequently, please
keep inventory. 19. The guide wire tube, it is best to equip a spare part because it may damage the
accessories.
Note:
1）Please strictly follow the picture instructions to connect, otherwise it will not be possible to solder.
2）Flux-core welding wire supports 0.8mm, 1.0mm(The machine parameter setting is based on 1.0 flux
cored wire. If you are welding 0.8 flux cored wire, please adjust the voltage appropriately).
3）The machine can install 1kg(2.2lb) wire reels.
4）The machine comes with a 1kg(2.2lb) flux-cored welding wire. You can install and use.
5）Support welding material, carbon steel, stainless steel, aluminum can not be welded.
6）The diameter of the welding wire, the groove of the wire feed wheel and the aperture of the contact tip
must match.
7) The pressure roller of the wire feeding structure should not be too tight or too loose, which will cause the
wire feeding to be unstable.
8) The installation of the wire feeding reel should not be too loose or too tight, which will cause the welding
wire of the wire reel to spring off and the wire feeding is too slow.
Possible problems
1) There is no response when turning on the power, please check the plug connection.
2) There is no response when turning on the power, please open the cover and check whether the internal
connecting wires are loose.
3) The wire feeding is unstable. Please check the wire feeding reel and the wire feeding pressure roller, and
the welding gun should not be wound. Pay attention that the diameter of the welding wire matches the
wire feeding wheel groove and contact tip.
4) No wire feeding, please confirm that the working mode is MIG state, please confirm that the welding gun
is connected well, press the gun switch or no wire feeding, please contact us.
5) During the welding process, if the time exceeds 3 minutes, over-current protection may occur. You need
to stop working for a few minutes, let the machine cool for a period of time, and automatically recover. If
the air cools for more than 10 minutes, the machine does not automatically recover, please shut down and
restart.
6) If you have any questions, please contact us at [e-mail].

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C) Spool gun mode
1. Select “SPOOL GUN ” process.
2. Solid wire welding: panel setting, polarity conversion wire and ground wire connection
please follow point “A”above.
3. flux cored wire welding: panel setting, polarity conversion wire and ground wire
connection please follow point “B” above.
4. Connect the spool gun. The spool gun is not a standard configuration and needs to be
purchased separately.