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LGK-40/63IGBT OPERATOR’S MANUAL

7. Connection of cutting ground wire

Connect the fast connector of cutting ground wire with the outlet marked with Cutting

Ground Wire on the front panel and screw down it clockwise. The other end of the cutting
ground wire is connected to workpiece firmly.



Operation method

1. Security notes

2. Turn on the power switch after installation and connection. Then the power indicator lamp

is ON.

3. Start gas supply equipment and turn on the gas supply switch, the power indicator lamp on

the panel is ON. If the gas pressure is less than 0.25Mpa, the lamp will be OFF, then the gas
source should be checked.

4. Gas control switch switches to Check air. Adjust the pressure Adjusting knob of gas filter on

Notes

Operation strictly accordant with the following steps

Notice

Electric shock may
hurt or even kill
man.

Cutting may cause fire or explosion



Splashes may ignite flammable materials

nearby. Those materials should be 10m away

from the working place.



Shut

off

the

power

during

connection



Do not touch the conducted parts

Fume & dust is harmful.



Do not breathe in the fume and dust

caused by cutting



Clean up the oil spot on work piece.



Keep fresh air in working place



Fume extraction equipment should

be prepared.

Arc may hurt your eyes and skin.



Strong arc may hurt your eyes.



Ultraviolet radiation generated by arc may hurt

skin and eyes. Please wear shielded guard

when cutting.

Overheated part may hurt
your skin.



Do not touch the overheated part on

the work piece.



Do not touch hot cable or torch just

by hands.

Fast moving thing may injure you.



Do not put your hands or other things into the

fan shield.



Cover the opened case shell well during cutting

operation.

In case of injury for your skin and eyes, please wear

required guards according to Labor Security and Hygiene
rules. Electrode and nozzle should be replaced only after
the cutter is power off.

Operation should proceed according to related Labor and
Security regulations.

Содержание LGK-40/63IGBT

Страница 1: ...LGK 40 63IGBT IGBT INVETER AIR PLASMA CUTTING MACHINE OPERATOR S MANUAL PLEASE READ IT CAREFULLY BEFORE OPERATION CHENGDU HUAYUAN ELECTRIC EQUIPMENT CO LTD ...

Страница 2: ...so working in rain is not suitable 4 The cutter has external static characteristic with rated duty cycle 60 which means the machine can work 6 minutes and rest 4 minutes at the rated cutting current in 10 minutes The machine has the function of thermal protection When the internal temperature exceeds a set temperature thermal protection moves on and the abnormity indicator lamp on the panel turns ...

Страница 3: ...be grounded perfectly Make sure that the insulating material of the electrode holder the grounding clamp the welding cable and the welding head are not affected by damp mildewed or spoilt and be replaced momentarily Never dip the electrode in water for cooling Never touch electric components of two welding machines at the same time because this voltage is supposed to be two times of welding voltag...

Страница 4: ...p welding Always wear safety glasses with side shields when being in a welding area The welding cables should be as close to the welding area as possible and the short the better Avoid welding cables going through the building framework lifting chains AC or DC cables of other welding machines and appliances The welding current is strong enough to damage them while having short circuit with them 5 ...

Страница 5: ...lders may use following method to reduce the hazardous of electromagnetic a Bundle the cable connected to the work piece and the welding cable together b Do not enwind partially or entirely your body with the cable c Do not place yourself between the welding cable and the ground work piece cable if the welding cable is by your left side then the ground cable should be by your left side too d The W...

Страница 6: ...tention 6 Work Environment Conditions 7 Technique Parameters 7 Working Principles 8 Panel and Functions 10 Protection function of the cutter 11 Installation and Operation 11 Maintenance 14 Cutting technology instruction 15 Troubleshooting and Repair 16 Accessories 18 ...

Страница 7: ...dsmoothincision Excellent technologyperformance 4 The cutting current is very stable and it will not be influenced by grid voltage fluctuation 5 There is over voltage protection function 6 Fast cutting speed high production efficiency and the speed is 2 5 times higher than flame cutting speed 7 Compressed air as cutting gas is low cost 3 Usage It is suitable for cutting kinds of metal materials li...

Страница 8: ...rp materials Protect the machine from fall or collision In case of fall or collision it can be used only after professional checking In the surface or inside of the cutting workpiece there should be no flammable and explosive materials or chemical materials harmful to human Installation and repair person must have state authorized electrician operation certificate Cutting operation person should r...

Страница 9: ...dimension Φ8 Gas supply flux 40L min Filter water from gas and then put it into cutter Figure 1 External characteristic Work principles The control circuit of cutting machine adopts advanced electronic part IGBT as the main inverter switch component Three phase AC power is converted to 20KHz high frequency DC current after being rectified by three phase rectifier Then under the function of IGBT in...

Страница 10: ...r u n i t C u r r e n t s a m p l i n g I n d u c t a n c e f i l t e r H i g h f r e q u e n c y t r a n s f o r m e r N e g a t i v e f e e d b a c k c o n t r o l c i r c u i t O ve r h e at u nd e r v o l ta g e p ro t e c ti o n c i r cu i t C u r r e n t g i v i n g c o n t r o l c i r c u i t P I a d j u s t m e n t c o n t r o l c i r c u i t P W M c i r c u i t Figure 2 Principle diagram ...

Страница 11: ...sed air exceeds 0 2Mpa It is OFF when the pressure is less than 0 15Mpa 3 Power supply abnormality indicator lamp It is ON when power supply is more than 440VAC or less than 300VAC 4 Overload indicator lamp It is ON when the cutter is over loaded generally it is on when cooling fan is damaged 5 Gas control selection switch When it switches to Check air gas valve opens to test gas flux When it swit...

Страница 12: ...king and there will be no arc striking 2 When the 3 phrase power supply is lower than 300VAC protection circuit starts working and there will be no arc striking Installation and Operation 1 Transport and Lift Power source should be shut off before moving the cutter The cutter bottom should be kept downwards during transportation It is forbidden to have cutter placed transversely or upended When li...

Страница 13: ...ipe with the gas inlet of air filter on the back panel and hoop it tightly The usage of air filter regulator is as follows When it is to adjust pressure lift up air pressure regulating valve and rotate it Left rotation aims to reduce outlet gas pressure right rotation aims to increase outlet gas pressure After the gas pressure is adjusted properly press down regulating valve The air filter regulat...

Страница 14: ...ashes may ignite flammable materials nearby Those materials should be 10m away from the working place Shut off the power during connection Do not touch the conducted parts Fume dust is harmful Do not breathe in the fume and dust caused by cutting Clean up the oil spot on work piece Keep fresh air in working place Fume extraction equipment should be prepared Arc may hurt your eyes and skin Strong a...

Страница 15: ...stops firstly loosen torch switch then lift up torch To follow above can have nozzle work life improved a lot 4 The status of gas pressure voltage electrode and nozzle should be observed closely during cutting Do not have electrode and conductive tip short circuit caused by copper spraying after using up hafnium wire in electrode and damage cutting torch The hafnium wire in each electrode is about...

Страница 16: ...The characteristics of the incision burr The ordinary cutting surface is smooth and clean but if the parameter selection is not suitable and electrode centering is not good then burr may be formed on the cutting surface Slag is formed by molten metal and its oxide which is adhesive to the bottom edge of incision and solidified The reason for forming this slag is that the molten metal adhesive stre...

Страница 17: ...h while if too big the plasma arc will be shorten the incision will be V shape the drag enlarge The burr can be formed under both conditions When cutting speed is too slow the incision is large and rough the bottom is easy to be over heated while the cutting speed is fast the drag is enlarged this is not beneficial for eliminating burr So under certain circumstance there exists a proper selection ...

Страница 18: ...ource to ensure the supply voltage accordance with the supply requirements 3 No arc striking or arc breaking during cutting Overheat indicator lamp is ON 1 The ambient temperature is too high 2 When cutting cooling fan rotates slowly or do not rotate so the cooling effect is bad 3 Temperature relay is damaged 1 Let the cutter rest for a while and will come to work normally later 2 Check fan power ...

Страница 19: ...LGK 40 63IGBT OPERATOR S MANUAL 18 1 Cutting power source 1set 2 Cutting torch 1pc 3 Ground cable 3m with DJK 16 red connector and ground clamp 1pc 4 Product certificate 1pc 5 Instruction manual 1pc ...

Страница 20: ......

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