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Westweld NB-350MK Manual Instruction

Mig/mag/co2 welding machine
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NB-350/500MK
MIG/MAG/CO
WELDING MACHINE
2
MANUAL
INSTRUCTION
(PLEASE READ CAREFELLY BEFORE OPERATION)

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Summary of Contents for Westweld NB-350MK

  • Page 1 NB-350/500MK MIG/MAG/CO WELDING MACHINE MANUAL INSTRUCTION (PLEASE READ CAREFELLY BEFORE OPERATION)
  • Page 2 Safety Depends on You Huayuan arc welding and cutting equipments are designed and built with safety in mind. However, your overall safety can be increased by proper installation. DO NOT INSTALL, OPERATE OR REPAIR THIS EQUIPMENT WITHOUT READING THIS MANUAL AND THE SAFETY PRECAUTIONS CONTAINED THROUGHOUT.

  • Page 3: Table Of Contents

    CONTENT Safety ..............................5 Summary ..............................1 2.1 Model instruction ..........................1 2.2 Main features ........................... 1 2.3 Usage ............................... 1 2.4 Working condition and environment ....................1 2.5 Symbol instruction ........................... 1 Specifications ............................2 3.1 Main technical parameters ....................... 2 Panel and function...........................
  • Page 4 9.2 Repairing ............................16 Common faults and eliminating methods ..................16 11 Packing List ............................19 Annex ............................20 1、NB350MK diagram ......................... 20 2、NB500MK diagram ........................21...
  • Page 5 1 Safety Arc and arc rays may harm health. C a u t i o n s Arc welding can be hazardous. All performing welding workers ought to have health qualification that provided by authority organization. Protect yourself and others from possible serious injury or death. Keep children away. Pacemaker wearers should consult with their doctor before operating.
  • Page 6 Fumes and Gases can be dangerous: Welding may produce fumes and gases hazardous to health. Avoid breathing these fumes and gases. While working in limited room, use enough ventilation and/or exhaust to keep fumes and gases away from the breathing zone, or use the respirator. ...
  • Page 7  Ground the equipment perfectly in accordance with the manufacturer’s recommendations. Power:(For engine driven welding and cutting equipment)  Work in ventilated place or outdoors.  Do not add fuel near to fire or during engine starting or welding. When not working, add fuel after engine is cooling down;...
  • Page 8 at any moment.  Do not move the hoist too fast. Noise: Huayuan Welding Machine Manufacture reminds users: Noise beyond the limit (over 80 db) can cause injury to vision, heart and audition depending on oneself. Please consult local medical institution. Use the equipment after doctor’s permission would help to keep healthy.

  • Page 9: Summary

    2 Summary Model instruction N B — □□□ MK Production code Rated welding current (A) Semi-automatic welding Gas shielded welder Main features ● Panel simple, easier parameters set and operation. ● Arc characteristic function is adjustable, suitable different welding condition. ●...

  • Page 10: Specifications

    Overheat Lack-voltage MIG/MAG Gas check Non-crater With crater Table 1 Symbol instruction 3 Specifications Main technical parameters Model Item Unit NB-350MK NB-500MK Input power V／Hz 3～380±15％ 50／60 rated input capacity 17.4 23.8 26.5 36.2 rated input current rated output current rated output voltage 31.5...

  • Page 11: Panel And Function

    0.73 0.92 power factor output current 40～350 60～500 14～40 14～50 voltage adjustment m/min 1～22 Wire feeding adjustment Crater current 40～350 60～500 Crater voltage 16～31.5 16～39 Ø 0.8、 Ø 1.0 、 Ø 1.2 Ø 1.0 、 Ø 1.2、 Ø 1.6 Suitable wire diameter Air cooling cooling mode Insulation grade...

  • Page 12: Down Front Panel

    will turn off the output; If the air inlet or outlet or the air duct is blocked, the fan rotates abnormally, the ambient temperature is too high, and the welding machine is overloaded and used continuously, etc., the internal temperature will be too high; When the temperature in the standby falls below the temperature protection point, the indicator will go out and the welder will automatically return to standby.

  • Page 13: Safety

    (1) Control cable socket: Used to connect the wire feeder control cable. (2) Welder output positive pole: used to connect the wire feeder welding cable. (3) Welder output negative: used to connect the workpiece connection cable. Rear panel instruction Rear panel instruction as follow Fig.3: Fig.3 Rear panel function (1) Power over-current protection switch: When the welder has abnormal input over-current, disconnect the power supply to protect it.

  • Page 14: Power Cable Connection

    (circuit breaker) and power cord. The selected distribution box and power cord must meet the relevant national standards. The conditions for the user's power supply should be as follows: Specification NB-350MK NB-500MK Switch capacitor（A） Fuse capacity（A） Power cable cross-sectional ≥4...
  • Page 15 Fig.4 Welder installation...

  • Page 16: Welder And Wire Feeder Connection

    Welder and wire feeder connection Please refer to fig.4 to connect: Connect one end of the negative output cable to the “-” output terminal block of the welder and the other end to the work-piece. (2) Connect one end of the positive output cable to the “+” output terminal block of the welder and the other end to the wire feeder connector.

  • Page 17: 2） Checking After Connection

    b) Wear a shield filter glass that match with different welding current to protect eyes; c) There should be ventilation in the welding place to prevent breathing in deleterious gas. Weld current 100A below 100A～300A 300A above Photo protection No.09 , No.10 No.11 , No.12 No.13 , No.14 degree...

  • Page 18: Weld Operation

    clockwise when the wire is out; Step 4: the welding wire passes through the correcting wheel (or guiding tube), the wire feeding wheel slot, and then the guiding nozzle is inserted; Step 5: pressing the pressing arm to press the welding wire, then lifting the handle to press the pressing arm, and rotating the handle to a moderate pressure;...

  • Page 19: 2） 2-Step Weld Operation(Non Initial And Crater)

    ● Enter the welding preparation state, and put the "2-step/4-step" switch of the welder panel to "4-step". Press the torch switch and start to supply air and enter the pre-air supply state. Waiting for a period of time, the welding voltage appears, and the slow wire feeding starts to enter the arcing state.

  • Page 20: Weld Condition Example

    7 Weld condition example The reference value values of the standard conditions are provided in Tables 6 and 7, which facilitates quick setting of parameters. In actual welding, please correct it according to the material to be welded and the welding position to find suitable welding conditions.
  • Page 21 Angle Thick Wire Weld Weld elonga weld Weld current Gas flow ness diameter voltage speed Item tion length (L/ min) (mm) (mm) (mm) (cm/min) (mm) 8, 9 6～7 1.2、1.6 270～380 29～35 40～45 20～25 7～8 1.2、1.6 300～380 32～35 35～40 20～25 2～2.5 19～20 19～20 1.0、1.2...
  • Page 22 Angle Thick Wire Weld Weld elonga weld Weld current Gas flow ness diameter voltage speed Item tion length (L/ min) (mm) (mm) (mm) (cm/min) (mm) thin plate speed 80～100 19～20 40～45 10～15 1.0、1.2 130～150 20～22 35～40 10～15 1.0、1.2 150～180 21～23 30～35 10～15 Table 7 Ι...

  • Page 23: Working Principle

    1.2～1.5 320～340 32～34 40～50 15～20 16.5 1、1.2 1、1.2 1、1.2 8 Working principle Working principle NB-MK series gas shield welding machine adopts the latest electron device----IGBT is the key inverter device. The three phase AC power is transformer into 20KHz high frequency voltage after bridge rectified. The high frequency voltage output welding voltage after transforming, rectifying and filtering.

  • Page 24: Component List

    Component list Item Model Code Note DZ47-63/3P D40 NB-350MK Air switch DZ47-63/3P D63 NB-500MK MDS75-12 NB-350MK Bridge rectifier MDS100-12 NB-500MK GD75HCU120B3S NB-350MK IGBT MMGTU100S120B6C NB-500MK V2、V3 NB-350MK V3、V4 Diode MMF200ZB040DK1 V4、V5、V6 NB-500MK Hall sensor TKC500BR Control transformer TN06 150FZY2-D/AC220 reverse...
  • Page 25 Common faults and eliminating methods: (see below sheet) Table 9 Common faults and eliminating methods Faults Reasons Eliminating methods 1． Put power on, the power 1.Open phase of three phase power; 1.Check the three phase power switch; indicator light, 2.The power switch is old and damaged; 2.Replace power switch;...
  • Page 26 7.Deformation on nozzle; 1.The potentiometer of current and 1.Replace potentiometer; 8. Current and voltage can voltage is damaged; not be adjusted 2.Repair or replace the PCB; 2.The PCB is damaged. 1.Short circuit on switch; 1.Repair or replace welding torch; 9 ． Wire is feed without 2.Manual wire feeding...

  • Page 27: Packing List

    11 Packing List NB-MK Power source Wire feeder Heater Composite cable Earth cable Torch Documents: operation manual, certificate, warranty 1 pc for each...

  • Page 28: Annex

    12 Annex 1、NB350MK diagram...

  • Page 29: 2、Nb500Mk Diagram

    2、NB500MK diagram...
  • Page 30 The final explanation rights reserved to Huayuan/Westweld Company! If there is any changes in the user’s manual, forgive not to inform separately! Westweld Ltd 4-23-4, No.51, Xuefu Avenue, Nanan, Chongqing, China E-mail: info@westweld.com sales@westweld.com www.westweld.com...

This manual is also suitable for:

Nb-500mk

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