Riland CUT 40CT User manual

CUT 40CT
PLASMA CUTTING MACHINE
USER MANUAL

Preface
This manual includes hardware description and operation introduction of equipment. For your and
other people’s safety, please read the manual carefully.
Pay attention
Pay attention to the words after the signs below.
Sign
Description
The words after this sign means there is great potential danger,
which may cause major accident, damage or even death, if it is not
followed.
The words after this sign means there is some potential danger,
which may cause hurt or property lose, if it is notfollowed.
The words after this sign means there is potential risk, which may
cause equipment fault or break, if it is not followed.
Version
Version YF-TAE-0112,A0, Released at 5th, Jan., 2018.
The contents of this manual are updated irregularity for updating of product. The manual is only used as
operation guide, except for other promises. No warranties of any kind, either express or implied are
made in relation to the description, information or suggestion or any other contents of the manual.
The images shown here are indicative only.If there is inconsistency between the image and the
actual product, the actual product shall govern

3
CONTENTS
SAFETYWARNING................................................................................................................................... 4
MACHINE DESCRIPTION ......................................................................................................................... 9
TECHNICAL PARAMETERS TABLE..................................................................................................................10
INSTALLATION INSTRUCTION................................................................................................................11
AIR REGULATOR INSTALLATION AND OPERATION....................................................................................12
PANELFUNCTION INSTRUCTION......................................................................................................... 13
OPERATION INSTRUCTION................................................................................................................... 14
NOTES OR PREVENTIVE MEASURES................................................................................................. 15
QUESTIONS TO BE RUN INTO DURING CUTTING.................................................................................. 16
MAINTENANCE....................................................................................................................................... 17
NOTES BEFORE CHECKING................................................................................................................. 17
TROUBLESHOOTING AND FAULTFINDING......................................................................................... 18
CIRCUIT DIAGRAM................................................................................................................................. 20

4
SAFETY WARNING
The safety notes listed in this manual is to ensure correct use of the machine and to keep you and other
people from being hurt.
The design and manufacture of plasma cutting machine considers safety. Please refer to the safety
warning listed in the manual to avoid accidents.
Different damage would be caused by wrong operation of the equipment as follows. Please read the
user manual carefully to reduce such damage.
Sign
Description
 Any contact of electric parts may cause fatal electric shock orburnt.
 Gas and fumes are harmful to health.
 Operation in narrow space may cause choke .
 Spark and hot workpiece after cutting may cause fire.
 Bad connected cable may cause fire.
 Incompletion connection of workpiece side circuit may causefire.
 Never cut on the case of tinder stuff, or it may causeexplode.
 Never cut airtight containers such as slot, pipe etc., or it maybreak.
 Arc ray may cause eye inflammation or skinburnt.
 Spark and residue will burn your eyes andskin.
 Toppling over of the gas cylinder will cause bodyhurt.
 Wrong use of the gas cylinder will lead to high-pressure gas
eruptionand cause human hurt.
 Never let fingers, hair, clothes or etc. near the moving parts such
asthe fan.
 The wire shoot out of the torch may stab eyes, face and other naked
parts.
 The machine is portable, never lift it by anyequipment.

5
Please follow the rules below to avoid heavy accidents.
Never use the equipment to do other things but cutting.
Follow related regulations for the construction of the input-driven power source, choice of
place, usage of high-pressure gas, storage, configuration, safe-keeping of workpiece after
cutting and disposal of waste, etc.
Nonessentials do not enter the cutting area.
People using heart pacemaker is not allowed to get close to the plasma cutting machine or
area without doctor’s permission. The magnetism created by energizing the plasma cutting
machine can have a bad effect to thepacemaker.
Install, operation, check and maintain the equipment by professionpersonnel.
Understanding the contents of the user manual for safety.
Please follow the rules below to avoid electric shock。
Keep away from any electric parts.
Earth the machine and workpiece by professionalpersonnel.
Cut off the power before installation or checking, and restart 5 minutes later. The capacitance
is chargeable device. Please ensure it has no voltage before start again even if the power
source is cut off.
Do not use wire with inadequate section surface or damage insulation sleeve or even exposed
conductor.
Do ensure well isolation of wire connection.
Never use the device when the enclosure isremoved.
Never use broken or wet insulationgloves.
Use firenet when work at highposition.
Check and maintain regularly, don’t use it until the broken parts are fixed well.
Turn off the power when not inused.
Follow the national or local related standard and regulations when using the DC plasma
cutting machine at narrow or high position.
Please follow the below notes to avoid fire and explode,etc.
No combustible in cutting area.
Keep off combustible when cutting.

6
Keep hot workpiece after cutting away from flammable gas.
Do move away the combustible around when cut the dooryard, ground andwall,.
The wire connection of base metal should be as close to the cutting place aspossible.
Never cut those facilities with gas pipe or airtightslot.
Put fire extinguisher around the cutting area to preventfire.
The gas and fumes are harmful to health, please wear protective
device according to regulations.
Wear exhaust equipment and breathe preventive facilities to prevent gas poisoning or choke.
Use suggested part exhaust equipment and breathe preventive facilities to prevent hurt or
poisoning by gas and other powder,please.
To prevent oxygen-deficiency, air out the gas-filled room which is full ofCO2 and argon on the
bottom, when operating on trunks, boilers, cabins,etc.
Please accept the supervisor’s inspection when operating in narrow space. Air the room and
wear breathe preventivefacilities.
Never operate in degrease, washing or sprayspace.
Using breathe preventive facilities when cut shielded steel for it will cause poisonous dust and
gas.
The arc, spark, residue and noise are harmful to health, please wear
protective appliance.
Eye protection against arc is recommended when cutting or supervise cutting.
Please wear preventive spectacles.
Operator’s gloves, operator’s goggles, long sleeve clothes, leather apron, and other
standard protection equipments must be worn for cuttingoperation.
A screen to protect other people against the arc must be set in the cuttingplace.
Please follow the notes below to avoid gas cylinder toppling over or
broken.
Use the gas cylinder correctly.
Use the equipped or recommended gaseousregulator.
Read the manual of gaseous regulator carefully before using it, and pay attention to the safety
notes.

7
Fix the gas cylinder with appropriative holder and other relativeparts.
Never put the cylinder under high temperature or sunshineenvironment.
Keep your face away from the gas cylinder exit when openingit.
Put on the gas shield when it is notused.
Never put the torch on the gas cylinder. The electrode can not meet the gas cylinder.
Any touch of the switch part will cause injury, please note the
following.
Never use the machine when the enclosure isoff.
Install, operate, check and maintain the machine by professionalperson.
Keep your fingers, hair, clothes etc. away from the switch parts such as thefan.
The wire end may deal damage, please note thefollowing.
Never look into the electric conduction hole when checking the wire feeding is normal or not, ,
or the shooting wire may stab your eyes andface.
Keep your eyes, face or other naked parts away from the end of torch when feeding the wire
manually or pressing the switch.
For better work efficiency and power source maintenance, please
note the following.
Precautions against toppling over.
Never use the cutting equipment for pipethawing.
Lift the power source from side when use the up-down forklift truck to avoid topplingover.
When using the crane for lift, tie the rope to the ears with an angle no more than φ15 to the
vertical direction.
When lifting the plasma cutting machine which equipped with gas cylinder and wire feeder,
download them from the power source and ensure the horizontal of the machine. Do fix the
gas cylinder with belt or chain when moving it to avoid bodyhurt.
Ensure fastness and insulation when lifting the wire feeder through the swing ring forcutting.

8
Lifting way for the machines with swing ring on the top（φ≤15°）
Electromagnetic interference needing attention.
It may need extra preventive measures when the equipment is used in particular location.
Before the installation, please estimate the potential electromagnetism problems of the
environment as follows.
a)Upper and lower parts of the cutting equipments and other nearby power cable, control
cable, signal cable and phonecable.
b) Wireless electric as well as TV radiation and receptionequipment.
c) Computer and other control equipments.
d) Safety-recognition equipment etc. Such as supervise of industrialequipments.
e) Health of people around. Such as personnel using the heart pacemaker oraudiphone.
f) Equipments for adjustment and measurement.
g)Anti-disturb capability of other used equipments .Users should ensure these equipments
and the environment are compatible, which may need extra preventivemeasures.
h) Practical state of the cutting and other activities.
Users should observe the following dos and don’ts to decrease radiationinterference.
a) Connect the cutting equipments to the power supplylines.
b) Maintain the cutting equipments regularly.
c) The cable should be short enough to be close to each other and theground.
d) Ensure the safety of all the cutting metal parts and other partsnearby.
e) The workpiece should be well earth.
f) Shield or protect the other cable and equipments to decrease the effects of disturbances.
The cutting equipments can be complete shielded in some specialconditions.
Users are responsible for interference due tocutting.

9
WARNING！
The machine is mainly used in industry. It will produce radio wave, so the worker
should make fully preparation for protection.
MACHINE DESCRIPTION
The plasma welding machine adopts the most advanced inverter technology, it’s applicable for
plasma cutting system with compressed air.
The development of welding and cutting equipment benefits from the appearance of the inverter
power supply theory and components.
Inverter cutting machine, firstly transfers the working voltage of 50/60Hz to high frequency (above
100KHz) via high-power device MOSFET, then reduces the voltage and adjusts the current, delivers
high-power cutting current via PWM technology.
Compared with traditional cutter, inverter technology has advantages of low energy consumption, light
weight, compact and excellent performance.
The Plasma Cutting Machine series can provide more powerful, concentrated and stable electric arc.
The arc temperature can rise up to 10,000-15,000℃, forming powerful plasma arc. That means the
plasma arc can be applied to cut metal rapidly, and make its heat affluence area as small as possible,
energy to be efficiently utilized, also can get a very smooth cutting section, which greatly facilitates
consequent processes.
The welding machine series can be easily designed into different cutting power sources, whose
output current is constant and adjustable. With excellent operation performance, its transfer efficiency
is commonly above 85%.
The machines have been widely applied in many areas, primarily focus on metal plate cutting and
special situations that are not suitable to be applied and achieved with common devices. Applicable
for various metal materials with different characteristics, including stainless steel, alloy steel, carbon
steel, cuprum and other ferrous metallic materials.
Compared with the others cutting machines, this cutting machine series provide functions of quick
power adjusting and controlling via advanced circuit module. Moreover, they have first-class cutting
operation and the enormous transfer efficiency.
Thanks for purchasing our products and looking forward to your precious advice. We will be dedicated
to provide our best products and service.

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TECHNICAL PARAMETERS TABLE
Model
Parameters
CUT 40CT
Input voltage（V）
AC220V15%
Frequency（Hz）
50/60
Rate input current（A）
30
No-load voltage（V）
275
Current Range（A）
15-40
Rate output voltage（V）
96
Duty cycle（%）
30
Efficiency（%）
80
Power factor
0.78
Insulation Class
F
Housing Protection Class
IP21
Arcing Way
Contact
Pressure of air compressor (Kgf/cm2)
4-5
Limited cutting thickness（mm）
16
Recommended cutting thickness（mm）
1-10
Weight（kg）
7.3
Dimensions
L*W*H（mm）
With angle: 402×160×300

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INSTALLATION INSTRUCTION
The plasma cutter is equipped with power voltage compensation equipment. When power voltage
fluctuates between±15% of rated voltage, it still can work normally.
When the machine is used with long cables, in order to prevent voltage form going down, bigger
section cable is suggested. If cable is too long, it may affect the performance of the power system.
So, we suggest you use configured length.
1. Make sure the intake of the machine not blocked or covered to avoid the malfunction of system.
2. Make sure the earth end of power interface has been reliably and independentlygrounded.
3. Use pressure-resisting air pipe to connect the air intake and compressed air source, and use
hoop and other way to tighten the joint. Air source should supply suitable pressure, flow and be
dry, If your air source does not meet the above requirements, you should consider using sole
compressor of the right power and air-decompressing filter, in order to supply suitablepressure
and eliminate the impurity and
moisture in the air.
4. Install the air-electricity system plug
to the socket in the panel and fix it
clockwise. Air plug of the cutting
torch and arc-keeping cable should
be connected to relevant socket,
and fix the screw.
5. Put the loop cable plug to the
fastening socket, and tighten
clockwise, another terminal holds
the work piece.
OUT IN
Air compressure
6. According to input voltage grade,
connect power supply box of
relevant voltage grade. Make sure
there is no mistake and makesure
Plasma cutting torch
Earth clamp
Workpiece
the voltage is different among permission rang.
7. Connect the cable as the picture shows, you can startcutting.
Related Parts Specification
Model
CUT 40CT
Rated current
20A
Cable
Input side
≥4mm2
Output side
≥6 mm2
Earth wire
≥4 mm2
Cutting torch
Recommended specification ≥30A

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1
Pressure adjustment knob
2
Sheet holder
3
Copper air mouth
4
Pressure meter
5
Air filtering bottle
6
Air pipe
7
Drain knob
8
Electromagnetic air-in
9
Air in
10
Air out
11
Pressure meter face
AIR REGULATOR INSTALLATION AND OPERATION
1. Firmly tight and seal the copper air hole at IN and OUT terminal by high pressure rubber tube
firmly.
2. Tight and seal the meter with meter face rubbertube.
3. Fix the sheet holder with screw as the regulator position.
4. Get down the plastic screw and fix the regulator on theshelf.
5. Turn on the air valve, turn up the pressure adjusting knob, Turn the pressure to rated volume
(meter inside shows Kgf/cm2)), and then put down the knob. (+ means increasing pressure, -
means decreasing pressure.)
6. Scale of the meter is as follow. The volume in the picture is4kgf/cm2.
7. If the water in the gas filtering bottle is too much, please turn on the water valve to let the water go
out.
Regulator installation

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PANEL FUNCTION INSTRUCTION
1
Post gas adjusting knob
2
Power indicator
3
Abnormal indicator
4
Welding current adjusting knob
5
Positive output terminal
6
Plasma cutting torch switch socket
7
Negative output terminal
The panel picture above is for reference only. If any difference with the real machine, please follow
with the real machine.

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OPERATION INSTRUCTION
1. Turn on the power switch of front panel, make the power switch is in “on” position. At this time
indicator of power switch is on.
2. Adjust the gas pressure to be adequate to machine, turn on the valve of pressed air.
3. Adjusting the cutting current according to the thickness and technology of the workpiece.
4. Press the cut torch switch to start magnetic valve, the Plasma cutting torch nozzle will blow out
plasma arc.

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NOTES OR PREVENTIVE MEASURES
1）The machine can perform in environment where conditions are dry with a dampness level of
max 90%.
2）Ambient temperature is between -10 to 40 degreescentigrade.
3）Avoid cutting in sunshine or drippings. Do not let water enter the gas.
4）Avoid cutting in dust area or the environment with corrosive gas.
5）Avoid gas cutting in the environment with strong airflow.
Our plasma cutting machine has installed protection circuit of over voltage, over current and over
heat. When voltage, output current and temperature of machine are exceeding the rate standard,
plasma cutting machine will stop working automatically. Because that will be damage to plasma
cutting machine, user must pay attention to following.
1）The working area is adequatelyventilated！
Our plasma cutting machine is powerful machine, when it is being operated, it generated by
high currents, and natural wind can’t be satisfied with machine cool demands. So, there is a
fan in inter-machine to cool down machine. Make sure the intake is not in block or covered, it
is 0.3 meter from plasma cutting machine to objects of environment. User should make sure
the working area is adequately ventilated. It is important for the performance and the longevity
of the machine.
2）Do not over load！
The operator should remember to watch the max duty current (Response to the selected duty
cycle). Keep cutting current is not exceed max duty cycle current. Over-load current will
damage and burn upmachine.
If cutting time is exceeded duty cycle limited, plasma cutting machine will stop working for
protection. Because machine is overheated, temperature control switch is on “ON’’ position
and the indicator light is red. In this situation, you don’t have to pull the plug, in order to let the
fan, cool the machine. When the indicator light is off, and the temperature goes down to the
standard range, it can cut again.
3）No over voltage！
Power voltage can be found in diagram of main technical data. Automatic compensation
circuit of voltage will assure that cutting current keeps in allowable range. If power voltage is
exceeding allowable range limited, it is damaged to components of machine. The operator
should understand this situation and take preventivemeasures.
2. Safety norms
1. Environment

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For normal operation you should cut from the edge of the work piece, in this way you
can protect the torch from damage by spatter conglutination.
QUESTIONS TO BE RUN INTO DURING CUTTING
Fittings, cutting materials, environment factor, supply powers maybe have something to do with
cutting. User must try to improve cutting environment.
A. Cutting surface is rough, poor cutting result.
The machine may be not well operated. You can check it as follow:
1. Make sure the compressed air supply has enough pressure which is not less than 0.3MPa
（3Kg/cm2）, and its range is±0.05Mpa.
2. Electrode and nozzle are not matched with current. Check asfollow:
Current
10-30A
30-40A
60-100A
Nozzle
￠1.0mm
￠1.2mm
￠1.3mm
B. Arc-striking is difficult and easy topause.
1. Make sure quality of tungsten electrode is high.
2. Cutting current is too small and air flow is too big. And if cooling effect is too strong, it will lead to
arc pause.
3. Power net voltage is low and input cable is toolong.
C. Output current is not up to the rated value.
When power voltage departs from the rated value, it will make the output current not matched with
rated value; when voltage is lower than rated value, the max output may be also lower than rated
value.
D. Current is not stabilizing when machine is beingoperated.
It has something to do with factors as following:
1. Electric wire net voltage has beenchanged.
2. There is harmful interference from electric wire net or otherequipment.
E. Electrode or nozzle burnt often.
1. Current is too big or nozzle is toosmall.
2. Air pressure is low and cooling effect is weak and nozzle is toohot.
F. Arc cannot cut into the steel plate fully, or too much spatter.
1. Maybe the machine capacity cannot meet the demand of that thickness, please use bigger
machine.
2. Electrode or nozzle is burnt, please changeit.

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WARNING：
Power must be turned off for all checking and maintenance, before opening the
housing, make sure the power plug is disconnected.
WARNING
Blind experiment and careless repair may lead to more problems and make formal
check and repair more difficult. When the machine is electrified, the bared parts contain life-
threatening voltage. Any direct and indirect touch will cause electric shock, and severe
electric shock will lead to death.
NOTICE: In the period of guarantee maintenance, if user makes wrong check and repair
for malfunction of plasma cutting machines without our permission, the free maintenance
guarantee offered will be invalid
MAINTENANCE
1. Remove dust by dry and clean compressed air regularly, if plasma cutting machine is operating in
environment where is polluted with smokes and pollution air, the machine need removing dust
every day.
2. Pressure of compressed air must be inside the reasonable arrangement in order to prevent
damaging to small components of inter-machine.
3. Check inter circuit of plasma cutting machine regularly and make sure the cable circuit is
connected correctly and connectors are connected tightly (especially insert connector and
components). If scale and loose are found, please give a good polish to them, then connect them
again tightly.
4. Avoid water and steam enter into inter-machine, if they enter into machine, please dry inter-
machine then check insulation ofmachine.
5. If plasma cutting machine will not be operated long time, it must be put into packing box and store
in dryenvironment.
NOTES BEFORE CHECKING

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TROUBLESHOOTING AND FAULT FINDING
Notes: The following operations must be performed by qualified electricians with valid
certifications. Before maintenance,please contact with us for professional suggestion.
Fault symptom and solutions
Faults
Solutions
Power indicator is not lit fan
does not work and no
welding output.
1. Power switch is out of work.
2. Check if electrify wire net (which is connected to input cable) is
in work.
3. Check if input cable is out of circuit.
.Power indicator is lit ,fan
does not work or revolve
several circles ,no welding
output
1. Maybe connect wrong to 380V power cause machine is in
protection circuit connect to 220V power and operate machine
again.
2. 220v power is not stable, (input cable is too slender) or input
cable is connected to electrify wire net cause machine is in
protection circuit. Add the section of cable and tighten input
connector firmly. Close machine 2-3 minutes then open itagain.
3. Open and close power switch constantly in short time cause
machine is in protection circuit Close machine 2-3 minutes then
open it again.
4. Cable s loosed from switch to power panel, tighten themagain.
5. Main circuit 24V relay of power panel is not close or has
damaged .Check 24V power source and relay .If relay has
damaged replace it with samemodel.
Fan is working, Indicator is
not lit and sound of HF
arc-striking can not be
heard ,wiping welding can
not strike arc.
1. Positive and negative electrodes of VH-07 insert component
voltage should be about DC308v from power panel to MOS
board.
2. There is a green indicator in auxiliary power of MOS board, if it
is not on, auxiliary power is out of work .Check fault spot and
connect with seller.
3. Check if connector is poor contact.
4. Check control circuit and find out reasons or connect with
seller.
5. Check if control cable of torch is broken.
Abnormal indicator is not
on, sound of HF arc-striking
can be heard, but there is
no welding output.
1. Check if torch cable is broken.
2. Check if grounding cable is broken or not connected to welding
piece.
3. Output terminal of positive electrode or torch electrify is loosed
from inter-machine.

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Abnormal indicator is notlit,
sound of HF arc-striking
can not be heard, wiping
welding can strike arc.
1. Primary cable of arc-striking transformer is not connected to
power panel firmly, tighten it again.
2. Arc-striking tip is oxidized or too far, give a good polish to it or
change it is about 1 mm between arc-striking tip.
3. Switch (sticking/argon-arc welding) is damaged, replaceit.
4. Some of HF arc-striking circuit components is damage, find out
and replace it.
Abnormal indicator is lit.
1. Maybe it is overheated protection, please close machine first,
then open the machine again after abnormal indicator isout.
2. Maybe it is overheated protection, wait for 2-3minutes
(argon-arc welding does not has overheated protection function)
3. Maybe inverter circuit is in fault, please pull up the supply
power plug of main transformer which is on MOS board (VH-07
insert which is near the fan) then open the machineagain.
(1) If abnormal indicator is still lit ,close machine and pull up
supply power plug of HF arc-striking power source
(which is near the VN-07 insert of fan ),then open
machine :
a. If abnormal indicator is still lit, some of field of MOS
board is damaged, find out and replace it with same
model.
b. If abnormal indicator is not lit, rise transformer of HF
arc-striking circuit is damaged, replace it.
(2) If abnormal indicator is not lit,
a. Maybe transformer of middle board is damage,
measure inductance volume and Q volume ofmain
transformer by inductance bridge (L=0.9-1.6mH
Q>35). If volume is too low, please replaceit.
b. Maybe secondary rectifier tube of transformer is
damaged, find out faults and replace rectifier tube
with samemodel.
4. Maybe feedback circuit is broken.
Output current is not
stabilizing or out of
potentiometer control
and sometime is
high, sometime is low.
1. 1K potentiometer is damage, replace it.
2. All kinds of connectors are poor connect, especial inserts etc.
please check it.
If after checking and adjustment it still cannot work normally, please contact the local distributor or
our service center.

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CIRCUIT DIAGRAM