DIGI-CUT 100 CNC

Part No. 9032H

OPERATOR’S
MANUAL
STEALTH DIGI-CUT 100 CNC

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.
 STEALTH DIGI-CUT 100 CNC

CONTENTS
1 SAFETY 4

2 TECHNICAL INFORMATION 6

2.1 MAIN CIRCUIT FUNCTIONS 6

2.2 FEATURES 7

3 INSTALLATION 8

3.1 UNPACKING 8
3.2 INPUT POWER CONNECTIONS 8
3.3 GAS CONNECTIONS 8

4 OPERATION CONTROL AND CONNECTORS 9

4.1 CUTTING PREPARATION 10

4.2 CUTTING OPERATION 10
4.3 ALARM INDICATOR 11
4.4 ABOUT THE CUT VOLTAGE DIVIDER 11

5 MAINTENANCE AND TROUBLESHOOTING 14

5.1 BASIC PROBLEMS 14

5.2 PILOT ARC PROBLEMS 14
5.3 CUTTING PROBLEMS 15

6 MAIN ELECTRICAL DIAGRAM 17

7 PARTS LIST 18
 OPERATION
l AND MAINTENANCE
To prevent possible OF and
injury, read, understand PLASMA ARC
follow all EQUIPMENT
warnings, C
safety precau
YOUR HEALTH.
before using the equipment.
STEALTH DIGI-CUT 100 CNC
l Plasma arc cutting produces intense electric and magnetic emissions that m
1 SAFETY
GASES AND
function ofFUMES
cardiac pacemakers, hearing aids, or other electronic health eq
OPERATION AND MAINTENANCE OF PLASMA ARC EQUIPMENT CAN BE
 DANGEROUS AND HAZARDOUS TO YOUR HEALTH
near plasma arc cutting applications should consult their medical health qu
  Plasma arc cutting produces intense electric and magnetic emissions that may
Gases and fumes producedfunction
during the plasma cutting process can beordangerous and haza
manufacturer
interfere of the healthofequipment
with the proper to deter-hearing
cardiac pacemakers, mine aids,
whether a hazard exists
other
l electronic
Keep allhealth
fumesequipment.
and gasesPersons
from thewhobreathing
work neararea.
plasma arc your
Keep cutting applications
head out of the cuttin
To prevent
l should possible
consult their medicalinjury,
health read, understand
professional and theand follow all
manufacturer of warnings,
the health safety
l equipment to determine respirator
Use an air-supplied whether a hazard exists. is not adequate to remove all fumes and
if ventilation
To before using the
prevent possible equipment.
injury, read, understand and follow all warnings, safety precautions
The
l and kinds of before
instructions fumes using
and gases from the plasma arc depend on the kind of metal be
the equipment.

the metal,
GASES and the different processes. You must be very careful when cutting o
AND FUMES
GASES
Gases and AND
fumes FUMES
produced during the plasma cutting process can be dangerous and
which may contain one or more of the following:
hazardous to your health.
 •
l Keep all fumes and gases from the breathing area. Keep your head out of the
  cutting fume plume.
Gases and fumes produced
• Use Antimony
during
Chromium
an air-supplied respirator
the Mercury
plasma
if ventilation
cutting process
is not adequateBeryllium
can be dangerous a
to remove all fumes and
l Keep Arsenic
gases.
all fumes and Cobalt
gases from the Nickel
breathing area. LeadKeep your head out of th
• The Barium
types of fumes and Copper Selenium
gases from the plasma arc dependSilver
on the kind of metal
UseCadmium
l being used,
an air-supplied Manganese
metal coatings, and the if
respirator Vanadium
different processes.
ventilation Youadequate
is not must be very careful all fum
to remove
when cutting any metals which may contain one or more of the following:
The kinds ofChromium
l Antimony fumes and gases Mercury from the plasma arc depend on the kind of m
Beryllium
Always read the Material
Arsenic Cobalt SafetyNickel Data SheetsLead (MSDS) that should be supplied with
the metal, and
Barium the different
Copper processes.
Selenium You must be very careful when cu
Silver
using.Cadmium Manganese Vanadium

These which
Always readmay
MSDSs willcontain
the Material
give you onetheor
Safety Datamore of the
Sheets
information following:
(MSDS)
regardingthat should be supplied with the
the kind and amount of fumes an
material you are using.
l These MSDS
dangerous to your
will health.
give you the information regarding the kind and amount of fumes and
gases that may be dangerous to your health.
l • Use Antimony
special
Use special equipment,
equipment, Chromium
suchasas
such water
water or Mercury
down
or down draftdraft cutting
cutting Beryllium
tables,
tables, to capture
to capture fumes fumes
Arsenic
and gases. Cobalt Nickel Lead
l Do not use the plasma torch in an area where combustible or explosive gases or ma
• Do notBarium Copper
use the plasma torch in an area where Selenium Silver gases or
combustible or explosive
materials
l Phosgene, area located.
Cadmium toxic gas, Manganese
is generated fromVanadiumthe vapors of chlorinated solvents and c
• Phosgene, a toxic gas, is generated from the vapours of chlorinated solvents and
sources
cleansers.ofRemove
these vapors.
all sources of these vapours.
Always read the Material Safety Data Sheets (MSDS) that should be supplied
ELECTRIC SHOCK
using.
Electric Shock can injure or kill. The plasma arc process uses and produces high
ELECTRIC SHOCK
voltage electrical energy.
These
This MSDSs will give
electric energy you severe
can cause the information
or fatal shockregarding the kind
to the operator andinamount
or others the of fu
  workplace. 1  
dangerous to your
• Never touch any health.
parts that are electrically ‘live’ or ‘hot’.
• Wear dry gloves and clothing. Insulate yourself from the work piece or other parts of
l the Usecutting
special equipment, such as water or down draft cutting tables, to captur
circuit.

l • Repair
Do notoruse
replace all worn or damaged parts.
the plasma torch in an area where combustible or explosive gase
• Extra care must be taken when the workplace is moist or damp.
l Phosgene, a toxic gas, is generated from the vapors of chlorinated solvent
4
sources of these vapors.
 •Be sure there is no combustible or flammable material in the workplace. Any mat
• Repair or replace all worn or damaged parts.
FIRE AND EXPLOSION
must be
• protected.
Extra care must be taken when the workplace is moist or damp. STEALTH DIGI-CUT 100 CNC
• • Ventilate allpower
flammable orbefore
explosive vaporsany from the workplace.
• Disconnect
FireDisconnect
and explosion powercan source
sourcebe before
performing
causedperforming
by hot slag, service service
any sparks, or repairs.
ororrepairs.
the plasma arc.
• • •Do notand
Read
Read cutfollow
and or weld
follow allall
theon containers
instructions
the instructionsinthat
the may
inOperating have
the Operating heldManual.
Manual. combustibles.
• Be sure there is no combustible or flammable material in the workplace. Any mater
• FIRE
Provide
AND aEXPLOSION
fire watch when working in an area where fire hazards may exist.
must be protected.
• Fire and explosion
Hydrogen
FIRE ANDgas
can be
may
EXPLOSION becaused
formed byand
hot slag,
trapped sparks,
underor the plasma arc.workpieces when they
aluminum
• • Ventilate all flammable
Be sure there is no combustibleor explosive
or flammablevapors from in
material thetheworkplace.
workplace. Any
using a water table.
material that DOcannot NOT cut aluminum
be removed alloys underwater or on a water table unl
must be protected.
• • Do not cut
Ventilate allor weld onorcontainers
flammable that may
explosive vapours have
from the held combustibles.
workplace.
eliminated or dissipated.
Fire and explosion can Trapped hydrogen
be caused by hotgas slag,that is ignited
sparks, or thewill cause
plasma an explosion.
arc.
• • Provide
Do not cuta fire watch
or weld when working
on containers that mayin an havearea
heldwhere fire hazards may exist.
combustibles.
• • Be sure athere
Provide is no combustible
fire extinguisher or flammable
when working in an area material
where fire in the workplace.
hazards may exist. Any mater
• Hydrogen gas may be formed and trapped under aluminum workpieces when they a
• Hydrogen gas may be formed and trapped under aluminium workpieces when they
must NOISE
be protected.
are cuttable.
underwater or while
using a water DO NOT cutusing a water table.
aluminum alloysDOunderwater
NOT cut aluminum
or on aalloys under-
water table unless
water or onalla water
• Ventilate flammable table unless the hydrogen
or explosive vapors gasfrom
can be theeliminated
workplace.or dissipated.
eliminated or dissipated.
Trapped hydrogen Trapped
gas that ishydrogen
ignited willgas causethatanisexplosion.
ignited will cause an explosion.
• Docan
Noise not cause
cut or weldpermanent on containers
hearing that
loss.may Plasma
have held arccombustibles.
processes can cause noise
NOISE
• Noise
You must Provide
protect ayour
can causefire permanent
watch
ears from when working
loud
hearing noise intoan
loss. Plasma area
prevent where fire
permanent
arc processes canhazards
loss of
cause may exist.
hearing.
noise levels
NOISE
to exceed safe limits.
• • You
Hydrogen
To protect
must
gas
your
protect
may
your
be formed
hearing
ears fromfrom and trapped
loudloud
noise noise,
under
to preventwear aluminum
protective
permanent
workpieces
ear
loss of
when they
plugs and/or
hearing. eara
using a• water
workplace. table.
To protect yourDO NOTfrom
hearing cutloud
aluminum
noise, wear alloys underwater
protective ear plugs orand/or
on a ear
water table unless
muffs.
Noise can others
Protect cause inpermanent
the workplace. hearing loss. Plasma arc processes can cause noise lev
eliminated or dissipated. Trapped hydrogen gas that is ignited will cause an explosion.
You•must•Noise levels
protect
Noise your
levels should be
earsbefrom
should measured to betosure
loud noise
measured tobeprevent
sure thepermanent
the decibels decibels
(sound)(sound)
loss do not
of exceed
do not hearing. exceed saf
safe
levels.
•
To protect your hearing from loud noise, wear protective ear plugs and/or ear m
NOISE
PLASMA ARC RAYS
PLASMA
workplace. ARC RAYS
Plasma Arc Rays can injure your eyes and burn your skin. The plasma arc process
• produces very bright
Noise levels shouldultra
beviolet and infra
measured to red light.the
be sure These arc rays(sound)
decibels will damage yourexceed safe l
do not
eyes and burn your skin if you are not properly protected.
Noise can cause permanent hearing loss. Plasma arc processes can cause noise lev
Plasma Arc Rays
• To protect can always
your eyes, injure wear
youra cutting
eyes and burn
helmet your skin.
or shield. The plasma
Also always arc proces
wear safety
You mustglasses
protectwith
yoursideears fromgoggles
shields, loud noise to protective
or other prevent permanent
eye wear. loss of hearing.
PLASMA
violet and redARC
infracuttinglight. RAYS arc rays will damage your eyes and burn your skin if you
• Wear glovesThese
and suitable clothing to protect your skin from the arc rays and
• To protect
sparks. your hearing from loud noise, wear protective ear plugs and/or ear m
workplace.
• Keep helmet and safety glasses in good condition. Replace lenses when cracked,
• Plasma Arc orRays
Tochipped
protect yourcan
dirty. injure
eyes, your wear
always eyes and burn your
a cutting helmet skin.
or The plasma
shield. arc always
Also processwp
• • Noise levels
Protect othersshould
in the be measured
work arc
arearays to
fromwillbe
the arcsure the
rays. Usedecibels (sound) do not exceed safe l
violet and
shields, infra red
goggles light.
or other These
protective eye wear. damage yourprotective
eyes andbooths, screens
burn your or if you
skin are
shields.

• Wear cutting gloves and suitable clothing to protect your skin from the arc rays an
PLASMA ARC RAYS
•
To protect your eyes, always wear a cutting helmet or shield. Also always wea
• Keep helmet and safety glasses in good condition. Replace lenses when cracked, c
shields, goggles or other protective eye wear.
• Plasma
Protect others
Arc Raysincan
theinjure
work your
area from the arc
eyes and rays.
burn yourUse protective
skin. booths,
The plasma arc screens
process op
• Wear cutting gloves and suitable clothing to protect your skin from the arc rays and
violet and infra red light. These arc rays will damage your eyes and burn your skin if you are
• Keep helmet and safety glasses in good condition. Replace lenses when cracked, chi
• Protect others in the work area from the arc rays. Use protective booths, screens or s
• To protect your eyes, always wear a cutting helmet or shield. Also always wea
shields, goggles or other protective eye wear.   2  
5  
• Wear cutting gloves and suitable clothing to protect your skin from the arc rays and
 
 §2 Technology Parameters
2.1 Working principle of main circuit
STEALTH DIGI-CUT 100 CNC

2 TheTECHNICAL INFORMATION
working principle of CUT 100 Air Plasma Cutting Machine is shown as the following figure.
Three-phase 380Vcircuit
2.1 Main work frequency
functions AC is rectified into DC (about 530V), then it is converted to medium

frequency ACThe(about
working20principle
KHz) byof inverter
DIGI-CUT 100 CNC
device Air Plasma
(discrete IGBT),Cutting Machine voltage
after reducing is shownby medium
as the following figure. Three-phase 380V work frequency AC is rectified into DC
transformer
(the main
(about transformer)
530V), then it isand rectifiedtobymedium
converted mediumfrequency
frequencyACrectifier
(about(fast recovery
20 KHz) diode), and is
by the
inverter device (discrete IGBT). The voltage is reduced via the medium transformer and
outputted by inductance filtering. The circuit adopts current feedback control technology to insure current
rectified by the medium frequency rectifier (fast recovery diode) then outputted by
stably.inductance
output Meanwhile, filtering. The current
the cutting circuit adopts current
parameter feedback
can be adjustedcontrol technology
continuously to ensure to meet
and steplessly
the current output is stable. The cutting current parameter can be adjusted
with
the requirements of cutting
continuously to meetcraft.
with the requirements of cutting.

Three-phase, AC DC AC Medium AC Medium DC DC

Rectify Inverter frequency frequency Hall device
380V，50Hz transformer rectify

Current positive-
feedback control
 
Fig. 2.1 Working principle diagram
fig 2.1 Working principle diagram

2.2 Parameters:
Table2.1 Technical parameters
Models
CUT 80 CNC CUT 100 CNC
Parameters
Rated input voltage（V） 3-380/400/440V±10% 3-380/400/440V±10%
Fre.（HZ） 50/60 50/60
Rated input current（A） 20 28
Rated input power（KW） 11 14.5
Cutting current adjustment range （A） 20～80 20～100
No-load voltage(V) 400 420
Duty cycle（40� 10minutes） 100% 80A 110V 100% 100A 125V
Severance Cut for Carbon Steel（mm） ≤45 ≤60
Carbon steel ≤30 ≤45
Stainless steel ≤30 ≤45
Optimal cutting thickness (mm)
Aluminum ≤25 ≤36
Cooper ≤15 ≤20
Dimensions（mm） 630*240*445 630*240*445
6
 STEALTH DIGI-CUT 100 CNC

DIGI-CUT 100 CNC

Power Supply Voltage (V) 3~400±10%
Frequency Hz 50/60
Rated input current (A) 28
Rated input power (Kw) 14.5
Adjustment range of current (A) 20~100
Max no-load voltage (V) 420
Duty cycle (40ºC / 10 minutes) 100A @ 80%
Severance Cut for Carbon Steel (mm) ≤60
Carbon Steel ≤45

Optimal cutting Stainless Steel ≤45

thickness (mm) Aluminium ≤36
Copper ≤20
Dimensions (mm) L x H x W 630 x 240 x 445
Protection class IP23
Insulation class H
Net weight (Kg) 30.5
Cooling method AF
Table 2.1 Technical information

2.2 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.

7
STEALTH DIGI-CUT 100 CNC

3 INSTALLATION §3 Installation
3.1 Unpacking 3. 1 Unpacking
Use the packingUse
lists to identify
the packing and account
lists to identify and accountfor each
for each item.
item.
1. Inspect each item for possible shipping damage. If damage is evident, contact your distributor and / or
3.1.1 Inspect each item for possible shipping damage. If damage is evident, contact
shipping company before proceeding with the installation.
your distributor and / or shipping company before proceeding with the
installation.When using forklift, its arm length must be long enough to reach the outside so as to ensure lifting
2.
safely.
3.1.2 When using a forklift, its arm length must be long enough to reach the outside
3. The movement may bring the potential danger or substantive hazard, so please make sure that the
so as to ensure safe lifting.
machine is on the safe position before using.
3.1.3 The movement may cause potential danger or substantive hazard. Make sure
the machine3.2 Input
is Power Connections
in a safe position before using.
Supply input connection of CUT 100 power is shown as the Power
3.2 Input Power Connections
Fig3.1. input

Supply input connection ofpower

1. Check your CUTsource
60 power isvoltage
for correct shown as plugging
before the Figin 3.1. Distrubutor

or connecting the unit

3.2.1 Check your power source for correct voltage before plugging Power
switch
in or connecting the and
2. Power Cord unit
Plug This power supply includes an input power
cord and plug suitable for 380V AC 3 - Phase input power. Live wire
3.2.2 Power Cord and Plug. This power supply includes an Earth wire
3. If the power supply voltage continually goes beyond the range of
input power cord and plug suitable for 220V AC 1 –
Phase inputsafe work voltage range, it will shorten the welder life-span. The
power.
following measures can be used:
3.2.3 If the power supply voltage continually goes beyond
the rangel ofChange
safe the power supply input. Such as, connect the welder with
work voltage range, it will shorten 3～380V Power
cable
the machine’s life-span.supply
the stable power Thevoltage of distributor;
following measures can
Rear panel
be used:l Reduce the machines using power supply in the same time;
Live wire
l Set the voltage stabilization device in the front of power cable
Power
• Change the power supply input, eg. connect the cable input Earth wire
input. the stable power supply voltage of
machine with
distributor.
3. 3Gas Connections
• Reduce
1. the machine’s
Connecting power
Gas Supply supply at the same
to Unit
Fig. 3.1
Fig Correct
3.1 the method
connect method of
time. of mainthe supply
main supply
Connect the gas line to the inlet port of the gas filter on the rear panel.
 
• Set the2. voltage
Check Airstabilisation
Quality device in the front of power cable input.
To test the quality of air, put the RUN / SET switch in the SET (down) position, check if there are Any
3.3 Gas Connectionsoil or moisture in the air.
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.
6  

8
 STEALTH DIGI-CUT 100 CNC
4.1 Layout Of The Front And Rear Panel:
4 OPERATION CONTROL AND CONNECTORS

 
Fig 4.1 schematic drawing of the front panel and rear panel
1. Cutting current regulator – used to regulate the current when cutting.
2. Power pilot lamp
1.Cutting current regulator: it is used to regulate the current when cutting.
3. Over-current / Over-heat alarm – when over-heat or over-current, the lamp would is lit.
2. Power
4.
pilot lamp
Current display
3. Over-current
5. ,over-heat
Cutting gun incorrectalarm :whenand
installation over-heat, over-current,
air pressure low alarm the lamp would be on.
6. Barometer
4.Current display display
7. Work lamp – turn on the switch of the cutting gun, generate the voltage, the lamp on
5.Cutting gun improper installation and air pressure low alarm
8. RUN/SET – when cutting the workpiece, turn to ‘RUN’. When performing a gas test,
6.Barometer
turn display
to ‘SET’.
9. lamp:
7. Work Cuttingturn
gun on
connector – connect
the switch of the to the cutting
cutting machine.the voltage, the lamp on
gun, generate
10. Remote control plug
8. RUN/SET: when cutting the workpiece, turn to the “RUN”; when doing gas test, turn to the “SET
11. Positive output cable – connect to the workpiece.
9.Cutting gun connector:
12. Barometer – ensureconnected
there is notoimpurity
the cutting machine in the compressed air.
and moisture
10.remote control
13. Power plug
cable – connect to the appropriate power supply.
14. Power
11.Positive switch
output – turn
cable: on or off the
connected power
to the source.
workpiece
9 moisture in the compressed air
12.Barometer :ensure there are no impurity and
STEALTH DIGI-CUT 100 CNC

4.1 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
4.2 Cutting Preparation
workpiece.
1) Tightly connect the power cable to electrical socket outlet (the input voltage, refer to the section 2
4.2.3 Turn on the power switch, the power source lamp is lit.
technology parameters)
4.2.4 Turnthethe
2) Tonnect RUN/SET
air pipe switch
to the air supply to SET
equipment, position
the earth cable to the–workpiece
the air flows, Regulate the air
3) Turn
pressure
on the powerto 3.5-6.0
switch bar
,the power source lamp on.

4.2.5 Turn
4) Turn the RUN/SET
the RUN/SET switch to SETswitch to air
position, the RUN position.
flow, then Regulate
regulate the air pressure tothe current after the flow
3.5-6bar

stops.
5) Turn the RUN/SET switch to RUN position, regulate the current after the flow stops.
6) Now all the preparation done .
4.2.6 Preparation is complete.
4.3 Cutting Operation
4.2 Cutting Operation
1. NormalCut

Automatic After
Turn on Automatic Pre-gas
examine Initializationpress
the power gas test for for 1s
for 5s on the torch trigger
source 10S
 

The current If the tiptouch the Shift to the Ignite the

Yes  
will down to workpiece and the workpiece, the pilotarc.
25A current higher than pilot arc change
25A, isn’t it ? into cutting arc

No  

The torch move away Loose the

Cutting the workpiece, then , cutting torch
the arc stops trigge.

Yes  
Restart and continue
working Is the torch trigger
Post-gas
No   pressed on again among
Finish after post-gas Time 20s
for seting time<1> the period of post-gas ?
 
 
Note:(1) The alarm lamp is on when cutting. Switch off the torch until the alarm
NOTE
sounds, then press the switch again to restart cutting.
1) The alarm lamp on when cutting, it is needed to loose the switch of the torch until the alarm release,
(2) During automatic gas test and examination, press on the cutting torch.
(3)
then pressAfter longtouse,
on the switch restartthe surface of the electrode and nozzle will have an oxidation
working.
reaction. Replace the electrode and nozzle. The alarm lamp will light when

  you remove the shield cup 8   as a safety precaution.

(4) If the cutting current is higher than 40A when the tip touches the work-
piece, the current will reduce to 40A in order to protect the tip.
(5) During post gas, if you hold down the trigger for a long time the arc restarts,
if you press and loosen the trigger quickly the gas stops, you can then hold
down the trigger to restart the machine.

10
 STEALTH DIGI-CUT 100 CNC

4.3 Alarm Indicator

4.3.1 When the machine appears to over-heat or over-current, the yellow indicator
(lamp 2) on the front panel remain on.
• Over-heat – the alarm will release after the fan cooling period. You can then
restart the machine.
• Over-current – the alarm is beyond retrieve. You must ask a qualified
technician to check the machine.
4.3.2 When any of the torch parts (including tip, electrode, shield cup and gas
distributor) are not correctly installed, the red indicator (lamp 3) lights.
4.3.3 When the air pressure is too low, the indicator (lamp 3) will remain on.
4.3.4 When the gas distributor is un-installed, there is no alarm while operating the
machine and when the trigger is pressed, there is no arc and no load. Open the
torch and check.

4.4 About the CUT voltage divider

CUT power supplies are equipped with an optional, factory-installed, four-position
voltage divider that is designed to be safely connected without tools. The built-in
voltage divider provides a scaled downarc voltage of 20:1, 30:1, 40:1, and 50:1
(maximum output of 18V). An optional receptacle on the rear of the power supply
provides access to the scaled down arc voltage and signals for arc transfer and plasma
start.

NOTE The factory presets the voltage divider to 20:1. To change the voltage divider to
a different setting, refer to the section on the next page.

The factory-installed internal voltage divider provides a maximum of 18V under

open circuit conditions. This is an impedance-protected functional extra low voltage
(ELV) output to prevent shock energy, and fire under normal conditions at the
machine interface receptacle and under single fault conditions with the machine
interface wiring. The voltage divider is not fault tolerant and ELV outputs do not
comply with safety extra low voltage (SELV) requirements for direct connection to
computer products.

11
 with the machine interfacewiring. The voltage divider is not fault tolerant and
ELV outputs do not comply withsafety extra low voltage (SELV) requirements
STEALTH DIGI-CUTfor
100direct
CNC connection to computerproducts.

Note:  NOTE
  The cover on the machine interface receptacle prevents dust and moisture
from damage when not in use. This cover should be replaced if damaged or
The cover
on thelost.machine interface
Installation receptacle
of the machineprevents
interfacedust andmust
cable moisture from damaging
be performed by a the rece

when not qualified
in use. This coverservice
shouldtechnician.
be replacedTo install a machine
if damaged or lost. interface cable:
of the1.machine
Installation Turn OFF the power
interface cableand disconnect
must the power
be performed cord.
by a qualified service technician. To in
machine interface2.cable:
Remove the machine interface receptacle’s cover from the rear of the
1. Turn
OFF the power power supply.
and disconnect the power cord.
the machine
2. Remove 3. Connect thereceptacle’s
interface machine interface cable
cover from thetorear
the of
power supply.supply.
the power
3. Connect the machine interface cable to the power supply.

3 1
Divider output
7 4
Gun switch signal
The small arc 8 connection
signal connection 11

The large arc 14 12

signal connection
 
Refer to the following table when connecting the CUT system to a torch height controller or CNC con
with a machine interface cable.
signal type Instruction The connector socket Cable e
Refer to the following table when connecting the CUT system to a torch height controller or
Normally open.
CNC controller with a machine interface cable.
18 VDC open circuit voltage at
Start (start 8（yellow
Signal Type
Input Instruction
START terminals. Connector
8、9 socket Cable ends
plasma) 9（green
Requires dry contact closure to
Normally open.
activate.
18 VDC open circuit voltage
Start (start 8 (yellow
Input at START open.
Normally terminals.
Dry contact 8, 9
plasma) 9 (green)
Requires dry contact closure
closure when the arctransfers.

Transfer(start to activate.
120 VAC/1 A maximum at the 13（blue
machine Output 13、14
Normallyinterface
machine open. Dry contact
relayor 14（whit
motion) closure when the arc transfers.
Transfer (start switching device (supplied by
120 VAC/1 A maximum at the 13 (blue)
machine Output the customer). 13, 14
machine interface relay or 14 (white)
motion)

Ground Ground switching device (supplied by
the customer).
CUT: Divided arc signal of
Voltagedivid 6（red）、
Ground Output
Ground 20:1,30:1, 40:1, 50:1 (provides a 6（+） 、7（-）
er （black）
maximum of 18 V).
CUT: Divided arc signal of
Voltage the five-position voltage divider on the CUT
Setting 6 (red)
Output 20:1, 30:1, 40:1, 50:1 6 (+), 7 (–)
divider 7 (black)

The factory (provides
presets the voltage divider atomaximum of 18 V).
20:1. To change the voltage divider to a different setting:
1. Turn OFF the power supply and disconnect the power cord.
2. Remove the power supply cover. 12
 STEALTH DIGI-CUT 100 CNC

Setting the five-position CUT voltage divider

The factory presets the voltage divider to 20:1. To change the voltage divider to a different
setting:
1. Turn OFF the power supply and disconnect the power cord.
2. Remove the power supply cover.
3. Locate the voltage divider DIP switches on the left side of the power supply.

Shift and Scale Selection

Dial Scale Selection

Number 20:1 30:1 40:1 50:1
1 ON 1 1 1
2 2 ON 2 2
3 3 3 ON 3
4 4 4 4 ON

CNC Control Cable Selectable Type

Number Standard (m)

6.310.660 5
6.310.660-D 10
6.310660-E 15

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STEALTH DIGI-CUT 100 CNC

5 MAINTENANCE AND 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.

5.1 BASIC PROBLEMS

5.1.1 When the machine is turned on, the power indicator lights up but both the fan
and the air control valve are not working.
5.1.1.1 Check the input lines and reconnect as necessary.
5.1.1.2 The main board in the machine has failed. A qualified technician
should change it.
5.1.2 Turn on the machine – the TIP/GUN/GAS indicator lights up.
5.1.2.1 Gas pressure is too low. Adjust the gas pressure to 65psi/4.5bar and
the barometer indicator to 0.45~0.5MPa.
5.1.3 Turn on the machine – the TIP/GUN/GAS indicator flickers.
5.1.3.1 The shield cup is not properly installed. Turn off the power source,
install and secure a good fit. Turn on the power source.
5.1.3.2 The Tip or electrode is not properly installed. Turn off the power
source and install the shield cup securely. Turn on the power source.
5.1.4 The temperature indicator lights up after the machine has only been on for a
short time.
5.1.4.1 Check for blocked air flow around the unit and correct as necessary.
5.1.4.2 Fan blocked. Check and correct as necessary.
5.1.4.3 The machine is over-heating. Let it cool down for at least five
minutes. Ensure the machine has not been operated beyond the
Duty Cycle (refer to Technical Information in Section 2).
5.1.4.4 Input voltage is over the normal range. Select the correct voltage
(refer to Technical Information in Section 2).
5.1.4.5 Faulty components in the machine. Return for repair or have a
qualified technician repair with reference to the Service Manual.

5.2 PILOT ARC PROBLEMS

5.2.1 Torch failed to ignite the arc when torch is triggered.
5.2.1.1 The system is set in ‘SET’ mode. Change to ‘RUN’ mode.
5.2.1.2 Faulty torch parts. Inspect and replace as necessary.
5.2.1.3 Gas pressure is too high or too low. Adjust to correct setting.
5.2.1.4 Faulty components in the machine. Return for repair or have a
qualified technician repair with reference to the Service Manual.

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 STEALTH DIGI-CUT 100 CNC

5.2.2 Difficulty igniting

5.2.2.1 The gas distributor is not installed correctly.
5.2.2.2 Worn torch parts (consumables). Shut off input power. Remove and
inspect torch shield cup, tip, starter cartridge, and electrode. Replace
electrode or tip if worn. Replace starter cartridge if end piece does not
move freely. Replace shield cup if excessive spatter adheres to it.
5.2.2.3 The machine is in trouble. Have a qualified technician repair with
reference to the Service Manual.

5.2.3 The torch is triggered but the pilot arc does not change to the cutting pilot.
The power indicator lights up. Gas flows. Fan operates.
5.2.3.1 Inaccurate connection between torch and power supply. Check the
torch leads are properly connected to a power supply.
5.2.3.2 Work cable not connected to work piece or connection is poor. Ensure
that work cable has an efficient connection to a clean and dry area of
the workpiece.
5.2.3.3 Faulty components in the machine. Return for repair or have a
qualified technician repair with reference to the Service Manual.
5.2.3.4 Faulty Torch. Return for repair or have qualified technician repair it.

5.2.4 Arc shuts off during operation and will not restart when torch is triggered.
5.2.4.1 Power Supply is overheated (OC/OT lamp lit) Let unit cool down for at
least five minutes. Ensure the unit has not been operated beyond
Duty Cycle limit. Refer to Section 2 for duty cycle specifications.
5.2.4.2 Gas pressure too low (the TIP/GUN/GAS lamp is lit when torch switch
is pressed on). Check source for at least 65 psi / 4.5 bar; adjust as
necessary.
5.2.4.3 Torch consumables worn. Check torch shield cup, tip, starter element,
electrode and replace as necessary.
5.2.4.4 Faulty components in unit. Return for repair or have a qualified
technician repair with reference to the Service Manual.

5.3 CUTTING PROBLEMS

5.3.1 No gas flow. The power lamp is lit and fan operates.
5.3.1.1 Gas pipe not connected or pressure is too low. Check gas connections.
Adjust gas pressure to proper setting.
5.3.1.2 Faulty components in the unit. Return for repair or have a qualified
technician repair with reference to the Service Manual.
5.3.2 Low Cutting Output
5.3.2.1 Incorrect setting of cutting current (A). Check and adjust to correct
setting.
5.3.2.2 Faulty components in unit. Return for repair or have a qualified
technician repair with reference to the Service Manual.

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STEALTH DIGI-CUT 100 CNC

5.3.3 Torch cuts but the cutting quality is poor.

5.3.3.1 Current (A) control set too low. Increase current setting.
5.3.3.2 Torch moves too fast across the workpiece. Reduce cutting speed.
5.3.3.3 Excessive oil or moisture in torch. Hold torch (3 mm) from clean
surface while purging and observe oil or moisture build-up (do not
activate torch). If there are contaminants in the gas, additional
filtering may be needed.
5.3.3.4 Lack of air pressure. Check the air pressure and air flow and adjust
to the appropriate position.

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 STEALTH DIGI-CUT 100 CNC
Appendix 1: Electrical principle drawing
6 MAIN ELECTRICAL DIAGRAM  
 

 
 
17  
STEALTH DIGI-CUT 100 CNC

7 PARTS LIST

9032H-02 COVER
9032H-04 FAN
9032H-04 ON/OFF SWITCH
9032H-06 AIR FILTER – USE 9030H
9032H-09 REAR PANEL
9032H-13 BASE
9032H-22 FRONT PANEL
9032H-25 CENTRAL SOCKET – USE 9030H-17
9032H-27 KNOB – USE 9000H-33
9032H-29 FRONT PCB
9032H-31 CONTROL PCB
9032H-33 SOLENOID VALVE
9032H-38 AUX PCB
9032H-41 DRIVER PCB
9032H-42 CAP PCB
9032H-43 EMC FILTER
9032H-A01 FILTER PCB
9032H-49 MAIN PCB ASSEMBLY

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 STEALTH DIGI-CUT 100 CNC

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STEALTH DIGI-CUT 100 CNC

Specialised Welding Products Ltd

Unit 1, Farringdon Industrial Centre, Farringdon, Nr Alton, Hampshire GU34 3DD, UK
tel: +44 (0)1420 588180 • fax: +44 (0)1420 588184 • email: sales@swp.uk.net