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Riland MIG 250D User Manual

Inverter welder
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INVERTER WELDER
MIG 250D
WELDING MACHINE
USER MANUAL

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Summary of Contents for Riland MIG 250D

  • Page 1 INVERTER WELDER MIG 250D WELDING MACHINE USER MANUAL...

  • Page 2: Welcome To A Better Way Of Welding

    Welcome to a better way of welding! For your own and other people’s safety, please read the manual carefully before operating. And the user manual must always be available near the welding machine. Disclaimer and Warning Thank you for purchasing our products. The content mentioned in this article concerns your safety and legitimate rights and responsibilities.

  • Page 3: Table Of Contents

    CONTENTS 1 Safety Guidelines and Precautions........................2 2 Overview.................................. 6 2.1 Product Introduction............................6 2.2 Application Area............................6 2.3 Technical Specifications..........................7 3 Installation................................8 3.1 Installation for MIG welding........................8 3.2 Installation for TIG welding........................10 3.3 Installation for MMA welding........................11 4 Operating Functions.............................12 4.1 Control Panel and label..........................12 4.2 Input/Output Panel............................14...

  • Page 4: Safety Guidelines And Precautions

    1 Safety Guidelines and Precautions Security Definitions It indicates that ignoring safety warnings could result in a major accident, or even death or serious injury. It indicates that ignoring safety warnings could result in minor injuries or property damage. It indicates that ignoring safety warnings could result in equipment failure or damage.

  • Page 5: Operational Safety Guidelines

    Operational Safety Guidelines Electrical Shock  Grounded all working materials.  Never touch ‘live’ electrical parts.  Always repair or replace worn or damaged parts.  Wearing dry insulated boots, and dry leather gloves.  Disconnect power source before performing any maintenance or service. ...
  • Page 6 Welding sparks can cause fire or explosion  Do not carry out welding operations in degreasing, cleaning and spraying areas.  Do not weld/cut gas-filled pipes, sealing grooves (boxes) and other devices, otherwise explosions or fires are likely to occur. ...
  • Page 7 Noise produced during welding can easily cause hearing loss  In order to avoid the harm of noise to you and others, please wear the prescribed protective equipment. Matters needing attention in hoisting  The power source with strap or hand is prohibited from using strap or hand for lifting.

  • Page 8: Overview

    2 Overview Product Introduction This series of machines use inverter technology to convert the current of 50 / 60Hz frequency into stable welding output current, and use pulse width modulation (PWM) technology to obtain constant current characteristics and excellent welding process effect.

  • Page 9: Technical Specifications

    Technical Specifications Type MIG 250D Item Power supply(V) 1 phases 220V±15% Frequency(Hz) 50/60 No-load voltage(V) 32.4 (MIG) Rated input current(A) 25.1 (TIG) 32.4 (MMA) 40 - 180 (MIG) Output current range (A) 10 - 180 (TIG) 20 - 160 (MMA)

  • Page 10: Installation

    3 Installation Installation for MIG welding When using long cable, in order to reduce voltage drop, big section cable is suggested. If the cable is too long, it will affect the performance of arcing and other system function, it is suggested to use the recommend length. 1.
  • Page 11 Gas-shielded Self-shielded Power supply Power supply Gas cylinder Earth clamp Earth clamp MIG torch MIG torch Workpiece Workpiece Spool gun Power supply Gas cylinder Earth clamp Spool gun Workpiece...

  • Page 12: Installation For Tig Welding

    Installation for TIG welding 1. Plug the work return lead into positive output terminal, and tighten firmly. 2. Connect work return clamp to the work piece. 3. Connect gas regulator of the TIG torch to gas cylinder. 4. Connect the electric connector of the TIG torch to negative terminal of the front panel, and fasten it clockwise.

  • Page 13: Installation For Mma Welding

    Installation for MMA welding There are two welding methods for MMA welding, please choose according to the actual needs. Direct Current Electrode Negative (DCEN): The positive output terminal is connected to the workpiece, and the negative output terminal is connected to the electrode holder. The DCEN is suitable for acid electrodes.

  • Page 14: Operating Functions

    4 Operating Functions Control Panel and label The components are described in the following table. Icons Name Description In MMA mode, Long press (5s) to switch VRD function. In MIG/Flux/Spool gun mode, Long press (5s) to switch between 2T and 4T. Left Knob In MIG/Flux/Spool gun mode, short press to switch arc length and inductance.
  • Page 15 Icons Name Description Value range: -20~ +20 (%) Inductance Short press the left knob, the indicator will light up, and then turn the left knob to adjust the inductance value. 2T function Valid under MIG/Flux function. 4T function Valid under MIG/Flux function. VRD function Valid under MMA function.

  • Page 16: Input/Output Panel

    Input/Output Panel Output Terminals Name MIG torch connector Polarity adapter Aviation socket Negative output terminal Positive output terminal Input Cable The I determines the input cable, correct plug and input current required for each 1eff machine. Max. effective supply current (I Input cable size 1eff ≤10 A...

  • Page 17: Operation

    5 Operation Operation Steps for MIG welding The operations of MIG welding are shown in the table below. Steps Description Turn on argon switch, and adjust gas pressure to rated value. 1 Set gas pressure Note: Skip this step when using gasless self shielded welding. 2 Starting up Turn on the power switch.

  • Page 18: Operation Steps For Mma Welding

    Operation Steps for MMA welding The operations of MMA welding are shown in the table below. Steps Description It is suggested to choose the diameter of electrode according to the 1 Select electrode thickness of the workpiece refer to the following table (Diameter of Electrode).

  • Page 19: Environment And Problems

    6 Environment and Problems Environment Note: The power source should not be used in rain or snow environment. The recommended external environment for welding is as follows:  Please place the power source in a horizontal position. The inclination of the power source shall not exceed 10°.

  • Page 20: Problems During Welding

    Problems During Welding Fittings, welding materials, environment factor, supply powers maybe have something to do with welding. User must try to improve welding environment. Problems Solutions 1. Examine whether grounding wire clamp contacts with the work pieces well. Arc starting is difficult and easy to break.

  • Page 21: Daily Maintenance And Checking

    7 Daily Maintenance and Checking Daily Maintenance In maintenance of the unit, take into consideration the rate of use and the environment it is used in. When the unit is used properly and serviced regularly you will avoid unnecessary disturbances in use and production. ...
  • Page 22 WELDING TORCH unstable arc, please change. Block caused by dirt in the Reason of poor wire sending and  tube, and the remains of the unstable arc, (use kerosene to wipe or wire plating lay. change new one). 1. Pyrocondensation tube broken, Wire sending tube broken O...

  • Page 23: Trouble Shooting

    8 Trouble Shooting IMPORTANT: Only authorised repair agents with valid certifications should carry out repairs and internal servicing. Fault symptom Remedy 1. Make sure the power cord is connected. 2. Check if electric wire net is in work. 3. Some of heat-variable resistors(four) of power panel is damaged, when it happen, general DC14V relay is open or connectors are poor contact.
  • Page 24 Fault symptom Remedy of main transformer which is on IGBT board then open the machine again: 1) If abnormal indicator is still lit, some of fieldistor of IGBT board are damaged, find out and replace them with same model. 2) If abnormal indicator is not lit: a.Maybe transformer of middle board is damaged, measure inductance volume and Q volume of main transformer by inductance bridge.

  • Page 25: Appendix A Circuit Diagram

    Appendix A Circuit Diagram...

  • Page 26: Appendix B Welding Parameter

    Appendix B Welding Parameter Welding Parameter for MIG Welding Plate Wire Φ Clearance Current Voltage Welding Gas flow (inch) (inch) speed elongation (L/min) Thickness (inch/min) (inch) (inch) 19.685 ～ .030 .030,.035 60～70 16～16.5 .394 23.622 75～85 17～17.5 19.685 ～ 10～15 .040 .030,.035 .394...
  • Page 27 Plate Wire Φ Current Voltage Welding Gas flow thickness (inch) speed elongation (L/min) (inch) (inch/min) (inch) .060 .030,.035 60～80 16～17 15.748 .394 ～ 19.685 .090 .030,.035 80～100 19～20 15.748 .394 10～15 ～ Fillet 21.654 weldin .126 .040,.045 120～160 20～22 13.780 .394～.590 10～15 ～...
  • Page 28 Plate Wire Φ Torch Current Voltage Welding Gas flow thickness (inch) vertical speed elongation (L/min) (inch) angle (°) (inch/min) (inch) .079 .045 47.244 .590 .090 .045 43.307 .787 .126 .045 43.307 .787 .177 .045 31.496 .787 .236 .045 27.559 .984 15.748 ～...
  • Page 29 Welding Parameter for TIG Welding The process parameters of flat butt TIG welding with different materials can refer to to the table below. Gas flow (L/min) Workpiece Tungsten Wire Current thickness diameter diameter Stainless Copper Titanium (inch) (inch) (inch) steel .012~.020 10~40 .040...
  • Page 30 Welding Parameter for MMA Welding Please refer to the following table for the welding process parameters of MMA welding, and the details shall be subject to the actual conditions. Electrode Electrode Connection Welding Diameter Current type model type post (inch) range (A) .098 50~90...

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