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Arcoweld ArcoMiG LCD 250C Operator's Manual

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Summary of Contents for Arcoweld ArcoMiG LCD 250C

  • Page 2 Our range can be viewed at - https://arcoweld.com.au/ For support please contact your Authorised distributor or Arcoweld directly T: + 61 8 9248 3188 F: + 61 8 9248 3166 93 Mulgul Road, MALAGA, WA 6090...
  • Page 3 CONTENT...

  • Page 4: Signal Explanation

    1 SAFETY 1.1 Signal Explanation  The above signals mean warning! Notice! Running parts and electric shocks can injure or kill. It is a safe operation after taking several necessary protection measures. 1.2 Arc Welding Damage  The following signals and word explanations relay dangers present during the welding operation. Please be aware and cautious.
  • Page 5 SUMMARY semiautomatic welding torch are also electrically “hot”.  Always be sure the work cable makes a good electrical connection with the metal being welded. The connection should be as close as possible to the area being welded. Maintain the electrode holder, work clamp, welding cable and welding machine in good, safe operating condition.
  • Page 6 SUMMARY the arc when welding or observing open arc welding.  Use suitable clothing made from durable flame-resistant material to protect your skin and that of your helpers from the arc rays.  Protect other nearby personnel with suitable, non-flammable screening and /or warn them not to watch the arc nor expose themselves to the arc rays or to hot spatter or metal.
  • Page 7 SUMMARY SELF-PROTECTION  Keep all equipment safety guards, covers and devices in position and in good repair. Keep hands, hair, clothing and tools away from V-belts, gears, fans and all other moving parts when starting, operating or repairing equipment.  Do not put your hands near the engine fan. Do not attempt to override the governor or idler by pushing on the throttle control rods while the engine is running.

  • Page 8: The Knowledge Of Electric And Magnetic Fields

    SUMMARY area.  Connect the work cable to the work as close to the welding area as practical. Work cables connected to the building framework or other locations away from the welding area increase the possibility of the welding current passing through lifting chains, crane cables or other alternate circuits. This can create fire hazards or overheat lifting chains or cables until they fail.
  • Page 9 SUMMARY  Route the electrode and work cables together – Secure them with tape when possible.  All cables should be put away and far from the operator.  Never coil the power cable around your body.  Make sure welding machine and power cable are as far away from the operator as possible according to the actual circumstance.

  • Page 10: Brief Introduction

    SUMMARY 2 SUMMARY 2.1 Brief Introduction Arcomig 250C welding machine utilizes the latest pulse width modulation (PWM) technology and insulated gate bipolar transistor (IGBT) power module, which can replace large transformer type welders. Inverters are portable, small, lightweight, with low power low consumption. This machine performs four welding processes, such as MIG, MMA, AC TIG and DC TIG.

  • Page 11: Module Explanation

    SUMMARY MMA——Manual Metal Arc welding PWM——Pulse-Width Modulation IGBT——Insulation Gate Bipolar Transistor 2.2 Module Explanation Arco - Arcomig Mig – Metal Inert Gas 250C – Max amperage compact machine 2.3 Working Principle The working principle of the ArcoMig 250c is shown as the following figure. Single phases work frequency AC 220V (50 Hz) is rectified into DC (about 380V), then is converted to medium frequency AC (about 44KHz) by inverter device (IGBT), after reducing voltage by medium transformer (the main transformer) and rectifying by medium frequency rectifier (fast recovery diode), and is outputted by...
  • Page 12 SUMMARY （V） Volt-ampere characteristic The relation between the conventional loading Working voltage and welding current point （A）...

  • Page 13: Installation And Adjustment

    MAINTENANCE &TROUBLESHOOTING 3 Installation and Adjustment 3.1 Parameters ArcoMig 250C Model Parameters 1~110±10% Input Voltage（V） 1~220±10% 32.6A 24.8A 31.4A Input Current（A） 36.2A 27.0A 40.0A 32.6A 24.8A 31.4A Efficient Input Current（A） 22.9A 40% 17.1A 40% 25.3A 40% 18.1A 25% 13.5A 25% 20A 25% 3.6KW ...

  • Page 14: Dimensions (Mm)

    MAINTENANCE &TROUBLESHOOTING Diameter(mm) 80% 82% 82% Efficiency (%) 0.99 Power Factor Cooling Protection class IP23 Fe：0.6/0.8/0.9/1.0 Al:0.9/1.0/1.2/1.6 Electrode Diameter Flux:0.9/1.0/1.2/1.6 Electrode Type Insulation class 615×280×480 Dimensions（mm） 22.0 Weight（Kg） 3.2 Duty cycle & Overheat The letter “X” stands for duty cycle, which is defined as the proportion of the time that a machine work continuously...

  • Page 15: Movement And Placement

    MAINTENANCE &TROUBLESHOOTING within 10 minutes when it outputs the rated welding current. The relation between the duty cycle “X” and the output welding current “I” is shown as the right figure. If the welder is over-heat, the IGBT over-heat protection unit inside it will output an instruction to cut output welding current and brighten the over-heat pilot lamp on the front panel.

  • Page 16: Polarity Connection（Mma

    MAINTENANCE &TROUBLESHOOTING 3.5 Polarity Connection（MMA） MMA (DC): Choosing the connection of DCEN or DCEP according to the different electrodes. Please refer to the electrode manual. 3.6 Assembling the equipment (TIG) Workpiece is connected to the positive electrode of welding machine, and welding torch is ...
  • Page 17 8 leads. Consumable parts for TIG torch, such as tungsten electrode、tip、gas nozzle、electrode  shield(short/long) , please contcat Arcoweld or your distributor according to the accessory codes. When ArcoMig 250C welding machines are operated in HF ignition method, the ignition spark ...

  • Page 18: Operation

    MAINTENANCE &TROUBLESHOOTING 4 Operation 4.1 Layout for the panel ArcoMig 250C MIG gun quick connector The MIG welder’s positive polarity output. Positive output The welder’s positive polarity output. Shield gas connector Is connected to the gas input pipe of torch. Aero socket Is connected to torch switch control wire.（It has 14 leads and lead 8 - lead 9 are connected to torch switch control wire）.
  • Page 19 MAINTENANCE &TROUBLESHOOTING 13 Power source input To connect power source. 14 Fan When the electric welding machine is over-heat, the fan operates. It is used for cooling the components and parts inside the welder.

  • Page 20: Control Panel

    MAINTENANCE &TROUBLESHOOTING Voltage/down 4.2 Control panel slope/arc force adjusting knob LCD Display Current and wire feeding speed adjusting knob Inductance adjusting knob Control knob...
  • Page 21 MAINTENANCE &TROUBLESHOOTING Overview The key feature of the control panel is the logical way in which the controls are arranged. All the main parameters needed for day-to-day working can easily be -selected with the keys. -altered with the adjusting dial. -shown on the display during welding.
  • Page 22 MAINTENANCE &TROUBLESHOOTING Setting welding current ARC force Process/weldway Diameter Thickness Electrode Setting arc Display the setting force current The actual current and voltage display (3) The control knob In the process of use, this knob is mainly used for switching and confirm the page. When shifting the button right or left, the corresponding page will jump to the right or left.
  • Page 23 MAINTENANCE &TROUBLESHOOTING The direction of the page jumping while shifting the knob in the right The direction of the page jumping while shifting the knob in the right (4) The adjusting button of voltage, down slope and arc force In the different mode of welding, this knob has different function: (1) In the mode of MMA, it can adjust the arc force, the range is 0~10;...
  • Page 24 MAINTENANCE &TROUBLESHOOTING machine welding performance is better. NOTE: Only “Parameter selection keys” and “Adjusting dial” can be used in the welding process. Only “Rod electrode welding key”, and “Adjusting dial” can be used on MMA mode. 4.3 Argon Arc Welding Operation 4.3.1 TIG welding （4T operation）...
  • Page 25 MAINTENANCE &TROUBLESHOOTING output pulse function is turned on, the slope down current is pulsed; t4～t5： Down slope time, adjustment rang of down slope time: 0~10.0S;  t5～t6： Crater current holds time; adjustment range of crater current: 5~250A (315A);  t6： Loosen the torch switch, stop arc, and argon keeps flowing;...
  • Page 26 MAINTENANCE &TROUBLESHOOTING t3～t4： The output current slopes down to minimum current (5A), stop arc; adjustment  range of down slope time: 0~5S; t4～t5： Post flow time, adjustment range of post flow time: 0.1～10.0S;  t5： Electromagnetic valve is closed and stop argon flowing. Welding is finished. ...
  • Page 27 MAINTENANCE &TROUBLESHOOTING 4.4 Welding Parameters 4.4.1 Joint forms in TIG/MMA 4.4.2 The explanation of welding quality The relation of welding area color & protect effect of stainless steel Welding area argent, golden blue red-grey grey black color Protect effect best better good worst...
  • Page 28 MAINTENANCE &TROUBLESHOOTING 10～100 4～9.5 4～5 101～150 4～9.5 4～7 151～200 6～13 6～8 201～300 8～13 8～9 tungsten electrode sharpened of the angle of cone（°） background current/A diameter /mm electrode diameter/mm 0.125 2～15 0.25 5～30 8～50 10～70 12～90 15～150 20～200 TIG of stainless steel (single run welding) Workpiece tungsten Argon gas...

  • Page 29: Operation Environment

    MAINTENANCE &TROUBLESHOOTING Parameters of piping back sealing welding for mild steel （DCEP） Argon Welding Piping Tungsten Welding Gas nozzle Welding flow rate rate diameter electrode wire diameter/mm current/A voltage/V diameter/mm diameter/mm Φ/mm L·min cm·min 75～90 11～13 6～8 4～5 75～95 11～13 6～8 4～5 75～100...
  • Page 30 MAINTENANCE &TROUBLESHOOTING ● In case closing the power switch, no-load voltage may be exported. Do not touch the output electrode with any part of your body. ● Before operation, no concerned people should be left. Do not watch the arc in unprotected eyes.
  • Page 31 MAINTENANCE &TROUBLESHOOTING 5 Maintenance & Troubleshooting 5.1 Maintenance In order to guarantee that arc welding machine works high-efficiently and in safety, it must be maintained regularly. Let customers understand the maintenance methods and means of arc welding machine more , enable customers to carry on simple examination and safeguarding by oneself, try one's best to reduce the fault rate and repair times of arc welding machine, so as to lengthen service life of arc welding machine .Maintenance items in detail are in the following table.
  • Page 32 Maintenance must be performed carefully. If any wire becomes flexible or is misplaced, it may be a potential danger to  user! Only Professional maintenance personal who are Authorized by Arcoweld can overhaul or repair the machine.  Always turn off the power source before removing covers or working on unit.
  • Page 33 MAINTENANCE &TROUBLESHOOTING Troubles Reasons Solution value. The max value displayed isn’t accordant with Adjust potentiometer Imax on the power the actual value. (Please refer to §3.1) board. The welding current is adjusted too low Increase the welding current The penetration of molten pool is not enough.

  • Page 34: Electrical Principle Drawing

    MAINTENANCE &TROUBLESHOOTING 5.3 Electrical principle drawing...
  • Page 35 _______________________________________________________________________________________ Arcoweld will repair or replace, at its discretion, any warranted parts or components that fail due to defects in material or workmanship within the time periods set out below. Arcoweld must be notified within 30 days of any failure, at which time Arcoweld will provide instructions on the warranty procedures to be implemented.
  • Page 36 Note: * No employee, agent, or representative of Arcoweld is authorized to change this warranty in any way or grant any other warranty, and Arcoweld shall not be bound by any such attempt. Correction of nonconformities, in the manner and time provided herein, constitutes fulfilment of Arcoweld’s obligations to purchaser with respect to the product.
  • Page 37 To make a claim under the warranty, take the product (with proof of purchase from an Arcoweld Accredited Seller) to the store where you purchased the product, or contact Arcoweld on T:...
  • Page 38 MAINTENANCE &TROUBLESHOOTING...

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