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Cool down the heat components in the cutting machine. 

2. Operating procedure 

2.1 After going through periodical check process, power on the cutting machine, then 

working indicator will light up and cooling fan will spin. 

2.2 Flip the “Gas test/Cutting” switch to “Gas test”. 

The gas valve in the machine will turn on and let gas flow up to one minute to remove 

condensed water drops accumulating in the torch. Regulate the compressed air filter to 

let the hand of air gauge indicate 0.45 Mpa. Then flip the “Gas test/Cutting” switch to 

“Cutting”. 

2.3 ACUT60 cutting machine applies contact type cutting torch. When cutting, let the 

nozzle of torches touch workpiece, then press the torch button to start arc. 

          ACUT100 andACUT120 cutting machine apply non-contact type cutting torch. When 

cutting, keep a distance from 3 to 5 mm between nozzle and workpiece to start arc and 

allow no touch between nozzle and workpiece in the process of cutting. 

2.4 Usually, cutting begins at the margin of the workpiece. It can also start at any point of the 

workpiece, but cutting torch should be tilted a bit to blow molten metal and form the 

start point of groove. 

2.5 While in cutting, keep cutting torch moving at consistent speed. 

2.6 While stopping cutting, move the torch away from woekpiece after the plasma arc goes 

out completely. Otherwise the workpiece will be distorted by remained arc. 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for WP-120A

Page 1: ...in mind However your overall safety can be increased by proper installation and thoughtful operation in your part DO NOT INSTALL OPERATE OR REPAIR THIS EQUIPMENT WITHOUT READING THIS MANUAL AND THE SAFETY PRECAUTIONS CONTAINED THROUGHOUT And most importantly think before you act and be careful C V A N U G R A H D U T A N I A G A Jln Arief Rahman Hakim 51 Komplek Ruko 21 Klampis Blok D 1 Telp 031 5...

Page 2: ...16 Index 1 Principle Technical data 1 2 Features Applications 5 3 Installation Guide 6 4 Operating Instruction 9 5 Repair Maintenance 12 ...

Page 3: ... and anti fluctuating ability due to loop control of reasonable logic circuit design First the signals of the set parameters transmit into set circuit to adjust output current Secondly the feedback circuit amplifies output current to get feedback signal PWM circuit compares the set signals with feedback signals to determine output pulse width Finally driving circuit will control pulse to amplify p...

Page 4: ...A 30 120 Open load V 345 Rated load volt V 128 Rated duty cycle 60 Air pressure for cutting torch MPa 0 45 Gas flow rate L min 250 Max cutting thickness for carbon steel mm 35 Optimum cutting thickness for carbonsteel 1 30 Dimension 576 297 557 Weight Kg 43 5 Insulated class of main transformer H Insulated class of output reactor B Table 1 Parameter Specification ...

Page 5: ...19 2 Main circuit diagram WP120A Figure 3 Main Circuit Diagram of WP 120A ...

Page 6: ...transformer LGK 100 3 1 0 D2 Fast recovery diode module DWC2F100N060S D3 Fast recovery diode module DWC2F100P060S L2 Current exchange inductor ZX7 400Ⅲ 5 2 0 T4 Transformer for ZKB QDB ATIG 500 3 1 8 F1 Fuse 2A 5 20 M Fan AK2072HB 220V single phase SW Thermal switch JUC 6F 70 close QDB Drive board ZX7 400Ⅲ 7 0 ZKB Main control board LGK 100 6 0 DF Electromagnet valve DF2 5 0 8MPa AC36 Switch KCD4 ...

Page 7: ...c start Features and benefits HF inverter small size light weight Soft switch transform high efficiency Delayed post flow can protect plasma torch effectively Outstanding cutting quality with trim and slick edge Short circuit protection inside cutting torch HF arc starting easy to strike Non source power factor compensation technology high PF 2 cycle 4cycle operating modes provided Thermal protect...

Page 8: ...where humidity or perspiration considerably reduces the skin resistance of the human body and the insulation properties of accessories Environments with adverse conditions do not include places where electrically conductive parts in the near vicinity of the operator which can cause increased hazard have been insulated 1 2 Installation Location Be sure to locate the welder according to the followin...

Page 9: ...sition Removing fuses from fuse box or shutting off and red tagging circuit breaker or other disconnecting device 1 4 Power Supplier Requirement Input volt must be standard sine wave effective value 380V frequency 50Hz Unbalance degree of 3 phase volt must be no more than 5 Power supply Product type WP120A Power supply 3 phase AC380V 50Hz Min capacity Power network 38 5 KVA Generator 51 4 KVA Inpu...

Page 10: ...4 Connection Chart for WP series 1 3 phase 380V power source 2 Gas hose 3 Air compressor 4 Cutting torch 5 Output cable 6 Workpiece The max gas pressure of optional air compressor should be 0 8 Mpa and gas flow rate be no less than 250L min Connect air compressor to inlet of air gauge on the rear panel of cutter Turn on air compressor to let gas pressure climb up to proper value for cutting Then t...

Page 11: ...ting seam To Auto lock after successfully starting arc by pressing torch trigger then you can perform cutting by releasing the trigger When you press torch trigger again torch will stop cutting This mode is suitable for long cutting seam 3 Power on off indicator Indicating whether power source is effectively connected to power supply 4 Protection indicator lamp Cutting machine will automatically s...

Page 12: ...ust be firmly grounded the rest wires connect to corresponding 3 phase power supply 3 Compressed air filter Connect to air compressor by gas hose for reducing gas pressure and filtering moisture in the air Adjust the knob to alter the output air pressure of filter the values of air pressure displaying at the air gauge are normally in the range of 0 6 0 8Mpa The water accumulated in the water trap ...

Page 13: ...type cutting torch When cutting let the nozzle of torches touch workpiece then press the torch button to start arc ACUT100 andACUT120 cutting machine apply non contact type cutting torch When cutting keep a distance from 3 to 5 mm between nozzle and workpiece to start arc and allow no touch between nozzle and workpiece in the process of cutting 2 4 Usually cutting begins at the margin of the workp...

Page 14: ...xially nozzle cover press the nozzle toughly 3 While in cutting avoid moving cutting torch too quickly in case burning out nozzle due to arc flame rebounding from non cut through workpiece base as well as moving too slow to influence cutting quality 4 While in cutting please keep air pressure in the range of 0 6 to 0 8Mpa Let out accumulated water in the compressed air filter timely 5 The machine ...

Page 15: ...ked 3 Gas test Cutting switch is damaged 4 The output air pressure of air compressed filter is too high 1 Replace 2 Inspect gas way 3 Replace 4 Regulate pressure knob on the filter to reduce air pressure and release water valve After air pressure get down tighten up the valve 4 The cutting torch s button does not work 1 Button is damaged 2 Wire is broken 3 Control board is damaged 1 Replace 2 Conn...

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