Stealth DIGI-CUT 60-1 User manual

Part No. 9031H
DIGI-CUT 60-1
OPERATOR’S
MANUAL

STEALTH DIGI-CUT 60-1
IMPORTANT
Read this Owner’s Manual completely before attempting to use this equipment.
Save this manual and keep it handy for quick reference. Pay particular attention
to the safety instructions provided for your protection. Contact your distributor if
you do not fully understand this manual.

CONTENTS
1. SAFETY 4
2. TECHNICAL INFORMATION 6
3. INSTALLATION 8
4. OPERATION CONTROL AND CONNECTORS 9
5. MAINTENANCE 11
6. TROUBLESHOOTING 12
7. MAIN ELECTRICAL DIAGRAM 14
STEALTH DIGI-CUT 60-1

OPERATION AND MAINTENANCE OF PLASMA ARC EQUIPMENT CAN BE
DANGEROUS AND HAZARDOUS TO YOUR HEALTH
Plasma arc cutting produces intense electric and magnetic emissions that may
interfere with the proper function of cardiac pacemakers, hearing aids, or other
electronic health equipment. Persons who work near plasma arc cutting applications
should consult their medical health professional and the manufacturer of the health
equipment to determine whether a hazard exists.
To prevent possible injury, read, understand and follow all warnings, safety precautions
and instructions before using the equipment.
GASES AND FUMES
Gases and fumes produced during the plasma cutting process can be dangerous and
hazardous to your health.
• Keep all fumes and gases from the breathing area. Keep your head out of the
cutting fume plume.
• Use an air-supplied respirator if ventilation is not adequate to remove all fumes and
gases.
• The types of fumes and gases from the plasma arc depend on the kind of metal
being used, metal coatings, and the different processes. You must be very careful
when cutting any metals which may contain one or more of the following:
Antimony Chromium Mercury Beryllium
Arsenic Cobalt Nickel Lead
Barium Copper Selenium Silver
Cadmium Manganese Vanadium
Always read the Material Safety Data Sheets (MSDS) that should be supplied with the
material you are using.
These MSDS will give you the information regarding the kind and amount of fumes and
gases that may be dangerous to your health.
• Use special equipment, such as water or down draft cutting tables, to capture fumes
and gases.
• Do not use the plasma torch in an area where combustible or explosive gases or
materials are located.
• Phosgene, a toxic gas, is generated from the vapours of chlorinated solvents and
cleansers. Remove all sources of these vapours.
ELECTRIC SHOCK
Electric Shock can injure or kill. The plasma arc process uses and produces high
voltage electrical energy.
This electric energy can cause severe or fatal shock to the operator or others in the
workplace.
• Never touch any parts that are electrically ‘live’ or ‘hot’.
• Wear dry gloves and clothing. Insulate yourself from the work piece or other parts of
the cutting circuit.
• Repair or replace all worn or damaged parts.
• Extra care must be taken when the workplace is moist or damp.
STEALTH DIGI-CUT 60-1
1. SAFETY
4



§1 SAFETY
Important Safety Precautions
OPERATION AND MAINTENANCE OF PLASMA ARC EQUIPMENT CAN BE DANGEROUS AND
HAZ- ARDOUS TO YOUR HEALTH.
Plasma arc cutting produces intense electric and magnetic emissions that may interfere with the proper function
of cardiac pacemakers, hearing aids, or other electronic health equipment. Persons who work near plasma arc cutting
applications should consult their medical health professional and the manufacturer of the health equipment to deter-
mine whether a hazard exists.
To prevent possible injury, read, understand and follow all warnings, safety precautions and instructions before
using the equipment.
GASES AND FUMES
Gases and fumes produced during the plasma cutting process can be dangerous and hazardous to your health.
• Keep all fumes and gases from the breathing area. Keep your head out of the cutting fume plume.
• Use an air-supplied respirator if ventilation is not adequate to remove all fumes and gases.
• The kinds of fumes and gases from the plasma arc depend on the kind of metal being used, coatings on the
metal, and the different processes. You must be very careful when cutting or cutting any metals which may contain
one or more of the following:
Antimony
Chromium
Mercury
Beryllium
Arsenic
Cobalt
Nickel
Lead
Barium
Copper
Selenium
Silver
Cadmium
Manganese
Vanadium
Always read the Material Safety Data Sheets (MSDS) that should be supplied with the material you are using.
These MSDSs will give you the information regarding the kind and amount of fumes and gases that may be
dangerous to your health.
• Use special equipment, such as water or down draft cutting tables, to capture fumes and gases.
• Do not use the plasma torch in an area where combustible or explosive gases or materials are located.
• Phosgene, a toxic gas, is generated from the vapors of chlorinated solvents and cleansers. Remove all sources
of these vapors.
ELECTRIC SHOCK
Electric Shock can injure or kill. The plasma arc process uses and produces high voltage electrical energy.
This electric energy can cause severe or fatal shock to the operator or others in the workplace.
• Never touch any parts that are electrically “live” or “hot.”
1



§1 SAFETY
Important Safety Precautions
OPERATION AND MAINTENANCE OF PLASMA ARC EQUIPMENT CAN BE DANGEROUS AND
HAZ- ARDOUS TO YOUR HEALTH.
Plasma arc cutting produces intense electric and magnetic emissions that may interfere with the proper function
of cardiac pacemakers, hearing aids, or other electronic health equipment. Persons who work near plasma arc cutting
applications should consult their medical health professional and the manufacturer of the health equipment to deter-
mine whether a hazard exists.
To prevent possible injury, read, understand and follow all warnings, safety precautions and instructions before
using the equipment.
GASES AND FUMES
Gases and fumes produced during the plasma cutting process can be dangerous and hazardous to your health.
• Keep all fumes and gases from the breathing area. Keep your head out of the cutting fume plume.
• Use an air-supplied respirator if ventilation is not adequate to remove all fumes and gases.
• The kinds of fumes and gases from the plasma arc depend on the kind of metal being used, coatings on the
metal, and the different processes. You must be very careful when cutting or cutting any metals which may contain
one or more of the following:
Antimony
Chromium
Mercury
Beryllium
Arsenic
Cobalt
Nickel
Lead
Barium
Copper
Selenium
Silver
Cadmium
Manganese
Vanadium
Always read the Material Safety Data Sheets (MSDS) that should be supplied with the material you are using.
These MSDSs will give you the information regarding the kind and amount of fumes and gases that may be
dangerous to your health.
• Use special equipment, such as water or down draft cutting tables, to capture fumes and gases.
• Do not use the plasma torch in an area where combustible or explosive gases or materials are located.
• Phosgene, a toxic gas, is generated from the vapors of chlorinated solvents and cleansers. Remove all sources
of these vapors.
ELECTRIC SHOCK
Electric Shock can injure or kill. The plasma arc process uses and produces high voltage electrical energy.
This electric energy can cause severe or fatal shock to the operator or others in the workplace.
• Never touch any parts that are electrically “live” or “hot.”
1



§1 SAFETY
Important Safety Precautions
OPERATION AND MAINTENANCE OF PLASMA ARC EQUIPMENT CAN BE DANGEROUS AND
HAZ- ARDOUS TO YOUR HEALTH.
Plasma arc cutting produces intense electric and magnetic emissions that may interfere with the proper function
of cardiac pacemakers, hearing aids, or other electronic health equipment. Persons who work near plasma arc cutting
applications should consult their medical health professional and the manufacturer of the health equipment to deter-
mine whether a hazard exists.
To prevent possible injury, read, understand and follow all warnings, safety precautions and instructions before
using the equipment.
GASES AND FUMES
Gases and fumes produced during the plasma cutting process can be dangerous and hazardous to your health.
• Keep all fumes and gases from the breathing area. Keep your head out of the cutting fume plume.
• Use an air-supplied respirator if ventilation is not adequate to remove all fumes and gases.
• The kinds of fumes and gases from the plasma arc depend on the kind of metal being used, coatings on the
metal, and the different processes. You must be very careful when cutting or cutting any metals which may contain
one or more of the following:
Antimony
Chromium
Mercury
Beryllium
Arsenic
Cobalt
Nickel
Lead
Barium
Copper
Selenium
Silver
Cadmium
Manganese
Vanadium
Always read the Material Safety Data Sheets (MSDS) that should be supplied with the material you are using.
These MSDSs will give you the information regarding the kind and amount of fumes and gases that may be
dangerous to your health.
• Use special equipment, such as water or down draft cutting tables, to capture fumes and gases.
• Do not use the plasma torch in an area where combustible or explosive gases or materials are located.
• Phosgene, a toxic gas, is generated from the vapors of chlorinated solvents and cleansers. Remove all sources
of these vapors.
ELECTRIC SHOCK
Electric Shock can injure or kill. The plasma arc process uses and produces high voltage electrical energy.
This electric energy can cause severe or fatal shock to the operator or others in the workplace.
• Never touch any parts that are electrically “live” or “hot.”
1

STEALTH DIGI-CUT 60-1
5
• Disconnect power source before performing any service or repairs.
• Read and follow all the instructions in the Operating Manual.
FIRE AND EXPLOSION
Fire and explosion can be caused by hot slag, sparks, or the plasma arc.
• Be sure there is no combustible or flammable material in the workplace. Any
material that cannot be removed must be protected.
• Ventilate all flammable or explosive vapours from the workplace.
• Do not cut or weld on containers that may have held combustibles.
• Provide a fire extinguisher when working in an area where fire hazards may exist.
• Hydrogen gas may be formed and trapped under aluminium workpieces when they
are cut underwater or while using a water table. DO NOT cut aluminum alloys under-
water or on a water table unless the hydrogen gas can be eliminated or dissipated.
Trapped hydrogen gas that is ignited will cause an explosion.
NOISE
Noise can cause permanent hearing loss. Plasma arc processes can cause noise levels
to exceed safe limits.
You must protect your ears from loud noise to prevent permanent loss of hearing.
• To protect your hearing from loud noise, wear protective ear plugs and/or ear muffs.
Protect others in the workplace.
• Noise levels should be measured to be sure the decibels (sound) do not exceed safe
levels.
PLASMA ARC RAYS
Plasma Arc Rays can injure your eyes and burn your skin. The plasma arc process
produces very bright ultra violet and infra red light. These arc rays will damage your
eyes and burn your skin if you are not properly protected.
• To protect your eyes, always wear a cutting helmet or shield. Also always wear safety
glasses with side shields, goggles or other protective eye wear.
• Wear cutting gloves and suitable clothing to protect your skin from the arc rays and
sparks.
• Keep helmet and safety glasses in good condition. Replace lenses when cracked,
chipped or dirty.
• Protect others in the work area from the arc rays. Use protective booths, screens or
shields.



2
• Wear dry gloves and clothing. Insulate yourself from the work piece or other parts of the cutting circuit.
• Repair or replace all worn or damaged parts.
• Extra care must be taken when the workplace is moist or damp.
• Disconnect power source before performing any service or repairs.
• Read and follow all the instructions in the Operating Manual.
FIRE AND EXPLOSION
Fire and explosion can be caused by hot slag, sparks, or the plasma arc.
• Be sure there is no combustible or flammable material in the workplace. Any material that cannot be removed
must be protected.
• Ventilate all flammable or explosive vapors from the workplace.
• Do not cut or weld on containers that may have held combustibles.
• Provide a fire watch when working in an area where fire hazards may exist.
• Hydrogen gas may be formed and trapped under aluminum workpieces when they are cut underwater or while
using a water table. DO NOT cut aluminum alloys underwater or on a water table unless the hydrogen gas can be
eliminated or dissipated. Trapped hydrogen gas that is ignited will cause an explosion.
NOISE
Noise can cause permanent hearing loss. Plasma arc processes can cause noise levels to exceed safe limits.
You must protect your ears from loud noise to prevent permanent loss of hearing.
• To protect your hearing from loud noise, wear protective ear plugs and/or ear muffs. Protect others in the
workplace.
• Noise levels should be measured to be sure the decibels (sound) do not exceed safe levels.
PLASMA ARC RAYS
Plasma Arc Rays can injure your eyes and burn your skin. The plasma arc process produces very bright ultra
violet and infra red light. These arc rays will damage your eyes and burn your skin if you are not properly protected.
• To protect your eyes, always wear a cutting helmet or shield. Also always wear safety glasses with side
shields, goggles or other protective eye wear.
• Wear cutting gloves and suitable clothing to protect your skin from the arc rays and sparks.
• Keep helmet and safety glasses in good condition. Replace lenses when cracked, chipped or dirty.
• Protect others in the work area from the arc rays. Use protective booths, screens or shields.



2
• Wear dry gloves and clothing. Insulate yourself from the work piece or other parts of the cutting circuit.
• Repair or replace all worn or damaged parts.
• Extra care must be taken when the workplace is moist or damp.
• Disconnect power source before performing any service or repairs.
• Read and follow all the instructions in the Operating Manual.
FIRE AND EXPLOSION
Fire and explosion can be caused by hot slag, sparks, or the plasma arc.
• Be sure there is no combustible or flammable material in the workplace. Any material that cannot be removed
must be protected.
• Ventilate all flammable or explosive vapors from the workplace.
• Do not cut or weld on containers that may have held combustibles.
• Provide a fire watch when working in an area where fire hazards may exist.
• Hydrogen gas may be formed and trapped under aluminum workpieces when they are cut underwater or while
using a water table. DO NOT cut aluminum alloys underwater or on a water table unless the hydrogen gas can be
eliminated or dissipated. Trapped hydrogen gas that is ignited will cause an explosion.
NOISE
Noise can cause permanent hearing loss. Plasma arc processes can cause noise levels to exceed safe limits.
You must protect your ears from loud noise to prevent permanent loss of hearing.
• To protect your hearing from loud noise, wear protective ear plugs and/or ear muffs. Protect others in the
workplace.
• Noise levels should be measured to be sure the decibels (sound) do not exceed safe levels.
PLASMA ARC RAYS
Plasma Arc Rays can injure your eyes and burn your skin. The plasma arc process produces very bright ultra
violet and infra red light. These arc rays will damage your eyes and burn your skin if you are not properly protected.
• To protect your eyes, always wear a cutting helmet or shield. Also always wear safety glasses with side
shields, goggles or other protective eye wear.
• Wear cutting gloves and suitable clothing to protect your skin from the arc rays and sparks.
• Keep helmet and safety glasses in good condition. Replace lenses when cracked, chipped or dirty.
• Protect others in the work area from the arc rays. Use protective booths, screens or shields.



2
• Wear dry gloves and clothing. Insulate yourself from the work piece or other parts of the cutting circuit.
• Repair or replace all worn or damaged parts.
• Extra care must be taken when the workplace is moist or damp.
• Disconnect power source before performing any service or repairs.
• Read and follow all the instructions in the Operating Manual.
FIRE AND EXPLOSION
Fire and explosion can be caused by hot slag, sparks, or the plasma arc.
• Be sure there is no combustible or flammable material in the workplace. Any material that cannot be removed
must be protected.
• Ventilate all flammable or explosive vapors from the workplace.
• Do not cut or weld on containers that may have held combustibles.
• Provide a fire watch when working in an area where fire hazards may exist.
• Hydrogen gas may be formed and trapped under aluminum workpieces when they are cut underwater or while
using a water table. DO NOT cut aluminum alloys underwater or on a water table unless the hydrogen gas can be
eliminated or dissipated. Trapped hydrogen gas that is ignited will cause an explosion.
NOISE
Noise can cause permanent hearing loss. Plasma arc processes can cause noise levels to exceed safe limits.
You must protect your ears from loud noise to prevent permanent loss of hearing.
• To protect your hearing from loud noise, wear protective ear plugs and/or ear muffs. Protect others in the
workplace.
• Noise levels should be measured to be sure the decibels (sound) do not exceed safe levels.
PLASMA ARC RAYS
Plasma Arc Rays can injure your eyes and burn your skin. The plasma arc process produces very bright ultra
violet and infra red light. These arc rays will damage your eyes and burn your skin if you are not properly protected.
• To protect your eyes, always wear a cutting helmet or shield. Also always wear safety glasses with side
shields, goggles or other protective eye wear.
• Wear cutting gloves and suitable clothing to protect your skin from the arc rays and sparks.
• Keep helmet and safety glasses in good condition. Replace lenses when cracked, chipped or dirty.
• Protect others in the work area from the arc rays. Use protective booths, screens or shields.

STEALTH DIGI-CUT 60-1
6
2. TECHNICAL INFORMATION
2.1 Main circuit functions
The working principle of DIGI-CUT 60 is shown as the following figure. Three-phase
380V work frequency AC is rectified into DC (about 530V), then it is converted to
medium frequency AC (about 20 KHz) by the inverter device (discrete IGBT). The
voltage is reduced via the medium transformer and rectified by the medium frequency
rectifier (fast recovery diode) then outputted by inductance filtering. The circuit adopts
current feedback control technology to ensure the current output is stable. The cutting
current parameter can be adjusted continuously to meet with the requirements of
cutting.
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

4
§2 Technology Parameters
2.1 Working principle of main circuit
The working principle of CUT 60-1 Air Plasma Cutting Machine is shown as the following figure. Single-phase
220V work frequency AC is rectified into DC (about 312V), then it is converted to medium frequency AC (about
40KHz) by inverter device (discrete IGBT), after reducing voltage by medium transformer (the main transformer) and
rectified 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 cutting current parameter
can be adjusted continuously and steplessly to meet with the requirements of cutting craft.
Rectify Inverter
Medium
frequency
transformer
Medium
frequency
rectify
Hall device
Current positive-
feedback control
Three-phase, AC DC AC DC
380V，50Hz
AC DC

fig 2.1 Working principle diagram
2.2Parameters
Table2.1 Technical parameters
Models
Parameters
CUT 60-1
Rated input voltage（V）
1-220/230/240V±10%，50/60Hz
Rated input current（A）
41
Rated input power（KW）
7.1
Cutting current adjustment range （A）
20～60
No-load voltage (V)
400V
Duty cycle（40�10minutes）
95% 60A
100% 58A
The max. cutting thickness to Carbon steel（mm）
≤35
Optimal cutting thickness (mm)
Carbon steel
≤25
Stainless steel
≤25
Aluminium
≤20
Cuprum
≤14
Dimensions（mm）
640*240*445
Protection class
IP23
Insulation class
H
Net weight (kg)）
23
Cooling method
AF
Note: The above parameters are subject to change with the improvement of machines.
Single-phase AC
220V 50HZ
Fig. 2.1 Working principle diagram

DIGI-CUT 60
Power Supply Voltage (V) 1-220/230/240V±10%
Frequency Hz 50/60
Rated input current (A) 41
Rated input power (Kw) 7.1
Adjustment range of current (A) 20~60
Max no-load voltage (V) 400
95% 60A
Duty cycle (40ºC / 10 minutes) 100% 58A
Severance Cut for Carbon Steel (mm) ≤35
Carbon Steel ≤25
Optimal cutting Stainless Steel ≤25
thickness (mm) Aluminium ≤20
Copper ≤14
Dimensions (mm) L x W x H 640 x 240 x 445
Protection class IP23
Insulation class H
Net weight (Kg) 23
Cooling method AF
STEALTH DIGI-CUT 60-1
7
Table 2.1 Technical information
2.3 Features
2.3.1 IGBT parallel balanced current technology and digital control technology.
2.3.2 Wider input voltage flexibility provides peak performance power under variable
conditions (±15%) for steady cuts.
2.3.3 EMI filter restrains the EMI transmission of the power.
2.3.4 Starts without high-frequency so it will not interfere with controls or computers.
2.3.5 Pilot Arc Controller increases cutting capabilities and speeds, and improves tip
life.
2.3.6 Various protective and alarm functions over-temperature and over-current allow
faster troubleshooting and eliminates unnecessary downtime.
2.3.7 Back striking tip and electrode ensure velocity of striking and quality of arc for
prolonged usage.

STEALTH DIGI-CUT 60-1
8
3. INSTALLATION
3.1 Unpacking
Use the packing lists to identify and account for each item.
3.1.1 Inspect each item for possible shipping damage. If damage is evident, contact
your distributor and / or shipping company before proceeding with the
installation.
3.1.2 When using a forklift, its arm length must be long enough to reach the outside
so as to ensure safe lifting.
3.1.3 The movement may cause potential danger or substantive hazard. Make sure
the machine is in a safe position before using.
3.2 Input Power Connections
Supply input connection of CUT 60 power is shown as the Fig 3.1.
3.2.1 Check your power source for correct voltage before plugging
in or connecting the unit
3.2.2 Power Cord and Plug. This power supply includes an
input power cord and plug suitable for 220V AC 1 –
Phase input power.
3.2.3 If the power supply voltage continually goes beyond
the range of safe work voltage range, it will shorten
the machine’s life-span. The following measures can
be used:
• Change the power supply input, eg. connect the
machine with the stable power supply voltage of
distributor.
• Reduce the machine’s power supply at the same
time.
• Set the voltage stabilisation device in the front of power cable input.
3.3 Gas Connections
3.3.1 Connecting Gas Supply to Unit
Connect the gas line to the inlet port of the gas filter on the rear panel.
3.3.2 Check Air Quality
To test the quality of air, put the RUN / SET switch in the SET (down) position.
Check if there is any oil or moisture in the air.
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

6
§3 Installation
3. 1 Unpacking
Use the packing lists to identify and account for each item.
1. Inspect each item for possible shipping damage. If damage is evident, contact your distributor and / or shipping
company before proceeding with the installation.
2. When using forklift, its arm length must be long enough to reach the outside so as to ensure lifting safely.
3. The movement may bring the potential danger or substantive hazard, so please make sure that the machine is on
the safe position before using.
3.2 Input Power Connections
Supply input connection of CUT 60 -1 power is shown as the Fig3.1.
1. Check your power source for correct voltage before plugging in or connecting the
unit
2. Power Cord and Plug This power supply includes an input power cord and plug
suitable for 220V AC 1 - Phase input power.
3. If the power supply voltage continually goes beyond the range of safe
work voltage range, it will shorten the welder life-span. The following
measures can be used:
Change the power supply input. Such as, connect the welder with the stable power
supply voltage of distributor;
Reduce the machines using power supply in the same time;
Set the voltage stabilization device in the front of power cable input.
3. 3 Gas Connections
1. Connecting Gas Supply to Unit
Connect the gas line to the inlet port of the gas filter on the rear panel.
2. Check Air Quality
To test the quality of air, put the RUN / SET switch in the SET (down) position, check if there are Any oil or
moisture in the air.
Fig 3.1 the connect method of the main
supply

Fig. 3.1 Correct method
of main supply

STEALTH DIGI-CUT 60-1
9
4. OPERATION CONTROL AND CONNECTORS
1. Cutting current regulator – used to regulate the current when cutting.
2. Power pilot lamp – turn on power, the lamp is lit.
3. Alarm pilot lamp – Pilot lamp indicates when lit that the protection of the machine has
been activated.
4. Cutting gun incorrect installation and air pressure low alarm:
(a) When a sudden short circuit occurs between the electrode and the nozzle the lamp
is lit and air feeds intermittently.
(b) When the cutting gun without electrode and nozzle is installed, the lamp is lit and air
feeds intermittently.
(c) Lamp flashes when the Shield Cup is not installed.
(d) When the air is low, the lamp is lit
5. READY (DC Indicator) – Indicator is ON when DC output circuit is active.
6. RUN/SET – When cutting the workpiece, turn to ‘RUN’. When performing a gas test, turn
to ‘SET’.
7. Cutting gun connector – Connect to the cutting machine.
8. Positive output cable – Connect to the workpiece.
9. Barometer – Ensure there is no impurity and moisture in the compressed air.
10. Mains cable – Connect to the appropriate power supply.
11. Power switch – Turn on or off the power source.



5
§4 Operation
4.1 Layout Of The Front And Rear Panel


1. power pilot lamp: turn on power, the lamp on.
2. over-current ,over-heat alarm: when over-heat, over-current, the lamp would be on.
3. cutting gun improper installation and air pressure low alarm
(1)when short circuit occurred between the electrode and the nozzle for abnormal reasons, the lamp on , air feeds
intermittently.
(2)when cutting gun with no electrode and nozzle installed, the lamp on, air feeds intermittently .
(3)when the Shield Cup is not installed, the lamp flashes.
(4)when the air low, the lamp on
4. voltage pilot lamp: turn on the switch of the cutting gun, generate the voltage, the lamp on
5. RUN/SET: when cutting the workpiece, turn to the “RUN”; when doing gas test, turn to the “SET”.
6. compressed air connector
7. power switch: turn on or off the power source
8. power cable: connected to the appreciate power supply
9. cutting current regulator: it is used to regulate the current when cutting.
10. Cutting gun connector
11. positive output cable: connected to the workpiece



STEALTH DIGI-CUT 60-1
10
4.2 Cutting Preparation
4.2.1 Tightly connect the power cable to an electrical socket outlet (refer to the Input
Voltage in section 2 Technology Parameters).
4.2.2 Connect the air pipe to the air supply equipment and the earth cable to the
workpiece.
4.2.3 Turn on the power switch, the power source lamp is lit.
4.2.4 Turn the RUN/SET switch to SET position – the air flows, Regulate the air
pressure to 3.5-6.0 bar
4.2.5 Turn the RUN/SET switch to RUN position. Regulate the current after the flow
stops.
4.2.6 Preparation is complete.
NOTE (1) The alarm lamp is on when cutting. Switch off the torch until the alarm
sounds, then press the switch again to restart cutting.
(2) During automatic gas test and examination, press on the cutting torch.
(3) After long use, the surface of the electrode and nozzle will have an oxidation
reaction. Replace the electrode and nozzle. The alarm lamp will light when
you remove the shield cup as a safety precaution.
4.2 Cutting Operation
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

6

4.2 Cutting Preparation
1、Tightly connect the power cable to electrical socket outlet (the input voltage, refer to the section 2 technology
parameters)
2、connect the air pipe to the air supply equipment, the earth cable to the workpiece
3、turn on the power switch ,the power source lamp on.
4、now all the preparation done .
4.3 Cutting Operation
Note：（1）The alarm lamp on when cutting, it is needed to loose the switch of the torch until the alarm release, then
press on the switch to start cutting again.
（2）In the automatic gas test and examine, press on the cutting torch, there will no reflection.
（3）After a long usage, the surface of the electrode and nozzle will have Oxidation reaction. Please replace the
electrode and nozzle, For The alarm lamp will on when install the shield cup, and stop working,






Turn on
the power
source
Loosethe
cutting
torch
switch
thetorch
leavesthe
workpiece,
thecutting
arcchange
intopilotarc
again
pressonthe
cutting
switch 

Ignite the
pilotarc
Postgasfor
10s

shifttothe
workpiece,the
pilotarc
changeinto
cuttingarc
Arc
extinguished

STEALTH DIGI-CUT 60-1
11
5. MAINTENANCE
5.1 Cutting Gun
WARNING 1. Check consumable parts for damage and replace if worn.
2. Turn off the power source before checking or removing cutting gun parts
NOTE When operating the torch in normal conditions, a small amount of gas vents
through the gap between the shield cup and the torch handle. Do not
attempt to over-tighten the shield cup as irreparable damage to internal
components may result.
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9
§5 Maintenance
5.1 Cutting gun maintenance
Warning : 1. Check the consumable parts for damage, if worn, replace it.
2. Turn off the power source before check or remove cutting gun parts
Note: When operating the torch in a normal condition, a small amount of gas vents through the gap between the shield
cup and the torch handle, Do not attempt to over tighten the shield cup as irreparable damage to internal components
may result.
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STEALTH DIGI-CUT 60-1
12
6 TROUBLESHOOTING
WARNING There are extremely dangerous voltage and power levels present inside this unit.
Do not attempt to diagnose or repair unless you have had training in power
electronics measurement and troubleshooting techniques.
6.1 Power lamp and temperature lamp is on.
6.1.1 Check for blocked air flow around the unit and it is in good working order.
6.1.2 Fan blocked – check and correct condition.
6.1.3 Unit is overheated – allow it to cool down for at least 5 minutes and make sure
the unit has not been operated beyond Duty Cycle limit. Refer to Technical
Information in Section 2.
6.1.4 Faulty components in unit – return to your distributor for repair or have a
qualified technician repair using the Service Manual.
6.2 Torch fails to ignite the arc when torch switch is activated.
6.2.1 System is in ‘SET’ mode – change to ‘RUN’ mode.
6.2.2 Faulty torch parts – inspect torch parts and replace if necessary.
6.2.3 Gas pressure is too high or too low – adjust to correct pressure.
6.2.4 Faulty components in unit – return to your distributor for repair or have a
qualified technician repair using the Service Manual.
6.3 No cutting output. Torch is activated, power source is on, gas flows and fan operates
6.3.1 Torch not properly connected to power supply – check that torch leads are
properly connected to power supply.
6.3.2 Work cable not connected to work piece, or connection is poor – make sure
that work cable has a proper connection to a clean, dry area of the workpiece.
6.3.3 Faulty components in unit – return to your distributor for repair or have a
qualified technician repair using the Service Manual.
6.3.4 Faulty Torch – return to your distributor for repair or have a qualified
technician repair using the Service Manual.
6.4 Low cutting output
6.4.1 Incorrect setting of CURRENT control – check and adjust to correct setting.
6.4.2 Faulty components in unit. Return to your distributor for repair or have a
qualified technician repair using the Service Manual.
6.5 Difficulty Starting
6.5.1 Worn torch parts (consumables). Shut off input power. Remove and inspect
torch shield cup, tip and electrode. Replace electrode or tip if worn. Replace
shield cup if excessive spatter adheres to it.

6.6 Arc shuts off during operation. Arc will not restart when torch switch is activated.
6.6.1 Power Supply is overheated (OC/OT lamp is lit) – allow unit to cool down for
at least 5 minutes. Make sure the unit has not been operated beyond Duty
Cycle limit. Refer to Section 2 for duty cycle specifications.
6.6.2 Gas pressure too low (the TIP/GUN/GAS lamp is lit when torch is switched on)
– check source for at least 4bar/60psi and adjust as required (the machine
cover will require opening).
6.6.3 Torch consumables worn – check torch shield cup, tip, starter element and
electrode. Replace as required.
6.6.4 Faulty components in unit – return to your distributor for repair or have a
qualified technician repair using the Service Manual.
6.7 No gas flow, the power lamp is on and fan operates
6.7.1 Gas not connected or pressure too low – check gas connections. Adjust gas
pressure to correct setting.
6.7.2 Faulty components in unit – return to your distributor for repair or have a
qualified technician repair using the Service Manual.
6.8 Torch cuts but low quality
6.8.1 CURRENT control set too low – increase current setting.
6.8.2 Torch is being moved too fast across workpiece – reduce cutting speed.
6.8.3 Excessive oil or moisture in torch – hold torch 3 mm from clean surface while
purging and observe oil or moisture buildup (do not activate torch). If there are
contaminants in the gas additional filtering may be required.
13
STEALTH DIGI-CUT 60-1

14
STEALTH DIGI-CUT 60-1
7 MAIN ELECTRICAL DIAGRAM
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5.3Electrical principle drawing
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15
STEALTH DIGI-CUT 60-1

STEALTH DIGI-CUT 60-1