Unimig RAZOR MULTI 250 Operating Manual
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Unimig RAZOR MULTI 250 Operating Manual

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RAZOR MULTI 250 Manual APR23.indd 1
RAZOR MULTI 250 Manual APR23.indd 1
U11009K | Operating Manual
6/04/2023 4:01:28 PM
6/04/2023 4:01:28 PM

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Summary of Contents for Unimig RAZOR MULTI 250

  • Page 1 U11009K | Operating Manual RAZOR MULTI 250 Manual APR23.indd 1 RAZOR MULTI 250 Manual APR23.indd 1 6/04/2023 4:01:28 PM 6/04/2023 4:01:28 PM...

  • Page 2: Table Of Contents

    16. MMA: Welding Guide 17. MIG Troubleshooting 18. TIG Troubleshooting 19. MMA (STICK) Troubleshooting 20. Factory Reset 21. Indicator Lights 22. Error Codes 23. Wiring Diagrams 24. Machine Breakdown and Parts List RAZOR MULTI 250 Manual APR23.indd 2 RAZOR MULTI 250 Manual APR23.indd 2 6/04/2023 4:01:28 PM 6/04/2023 4:01:28 PM...

  • Page 3: Safety

    • Measures should be taken to protect people in or near the surrounding working area. Use protective screens or barriers to protect others from flash, glare and sparks; warn others not to watch the arc. RAZOR MULTI 250 Manual APR23.indd 3 RAZOR MULTI 250 Manual APR23.indd 3...
  • Page 4 • Do not touch hot parts with bare hands. Allow a cooling period before working on the welding/cutting gun. Use insulated welding gloves and clothing to handle hot parts and prevent burns. RAZOR MULTI 250 Manual APR23.indd 4 RAZOR MULTI 250 Manual APR23.indd 4...
  • Page 5 Caution: Only qualified technicians are authorized to undertake the repair of this welding/cutting equipment. For your safety and to avoid Electrical Shock, please observe all safety notes and precautions detailed in this manual. RAZOR MULTI 250 Manual APR23.indd 5 RAZOR MULTI 250 Manual APR23.indd 5...
  • Page 6 Welding Guns Of Australia PTY LTD, authorised representatives or agents of Welding Guns Of Australia PTY LTD will not be liable or responsible for the loss of any gas. RAZOR MULTI 250 Manual APR23.indd 6 RAZOR MULTI 250 Manual APR23.indd 6...

  • Page 7: Machine Features

    Advanced MMA Features got you covered. The RAZOR MULTI 250 features adjustable Arc Force and Hot 4 Geared Wire Drive Start functionality. These features are designed for improving Experience smooth and consistent wire feeding with our weld quality and ease of use.

  • Page 8: Package Contents

    4m 300 AMP Earth Clamp Drive Roller Includes: • 0.8-0.9mm "V GROOVE" 30/22 • 0.8-0.9mm "F GROOVE" 30/22 • 1.0-1.2mm "U GROOVE" 30/22 RAZOR MULTI 250 Manual APR23.indd 8 RAZOR MULTI 250 Manual APR23.indd 8 6/04/2023 4:01:35 PM 6/04/2023 4:01:35 PM...

  • Page 9: Machine Specifications

    Mild Steel, Stainless Steel, Aluminium, TIG: Mild Steel, Stainless Steel, Copper, MMA: Mild Steel, Stainless Steel, Cast Iron Silicon Bronze Silicon Bronze RAZOR MULTI 250 Manual APR23.indd 9 RAZOR MULTI 250 Manual APR23.indd 9 6/04/2023 4:01:35 PM 6/04/2023 4:01:35 PM...

  • Page 10: Machine Layout

    7. Wireless Remote Indicator 5.2 Rear Panel Layout 8. On/Off Switch 9. Gas Input 10. Input Power Cord 11. Front Lift Handle 12. Rear Lift Handle RAZOR MULTI 250 Manual APR23.indd 10 RAZOR MULTI 250 Manual APR23.indd 10 6/04/2023 4:01:36 PM 6/04/2023 4:01:36 PM...

  • Page 11: Interior Layout

    1. 4 Geared Wire Drive System 4. Door Latches 2. Wire Spool Holder 5. Cabinet Light 3. Drive Roller Storage 6. Settings Guide RAZOR MULTI 250 Manual APR23.indd 11 RAZOR MULTI 250 Manual APR23.indd 11 6/04/2023 4:01:36 PM 6/04/2023 4:01:36 PM...

  • Page 12: Geared Wire Drive System

    5.4 Geared Wire Drive System 1. Drive Roller Assemblies 2. Upper Roller Assembly 3. Tensioner Knob 4. Guide Tube 5. Wire Inlet Guide Tube RAZOR MULTI 250 Manual APR23.indd 12 RAZOR MULTI 250 Manual APR23.indd 12 6/04/2023 4:01:36 PM 6/04/2023 4:01:36 PM...

  • Page 13: Control Panel Layout

    (Volts, Inductance, Arc Force, Burnback) 15. VRD Indicator Light 10. Remote Mode Button 4. Adjustment Knob B 11. Synergic Mode Button 5. Weld Mode Selection Button RAZOR MULTI 250 Manual APR23.indd 13 RAZOR MULTI 250 Manual APR23.indd 13 6/04/2023 4:01:36 PM 6/04/2023 4:01:36 PM...

  • Page 14: Control Panel Details

    Press the Wire Diameter Size Selection Button to cycle through the wire diameter sizes available for synergic programming. Note: Not all sizes are available for all material/gas types. RAZOR MULTI 250 Manual APR23.indd 14 RAZOR MULTI 250 Manual APR23.indd 14...
  • Page 15 Gas Test Press this button to activate the gas solenoid. This allows you to ensure the gas system is functioning correctly without wasting wire. RAZOR MULTI 250 Manual APR23.indd 15 RAZOR MULTI 250 Manual APR23.indd 15 6/04/2023 4:01:36 PM 6/04/2023 4:01:36 PM...

  • Page 16: Advanced Settings Menu

    Hot Start Current (MMA) 0-60 (Amps) Slow Wire Feed Speed (Disabled) (1/3 speed) (1/2 speed) (2/3 speed) Remote Mode Type (Wireless) (Wired) RAZOR MULTI 250 Manual APR23.indd 16 RAZOR MULTI 250 Manual APR23.indd 16 6/04/2023 4:01:36 PM 6/04/2023 4:01:36 PM...

  • Page 17: Mig Manual Mode

    Inductance and Burnback by pressing the knob in. Note: Available adjustment voltage with Knob B is based on your settings with Knob A. RAZOR MULTI 250 Manual APR23.indd 17 RAZOR MULTI 250 Manual APR23.indd 17 6/04/2023 4:01:36 PM...

  • Page 18: Mig: Machine Setup

    Do this for both the key slot on each assembly. assemblies. RAZOR MULTI 250 Manual APR23.indd 18 RAZOR MULTI 250 Manual APR23.indd 18 6/04/2023 4:01:37 PM 6/04/2023 4:01:37 PM...
  • Page 19 Euro Connect Port. Ensure you line up the internal ports correctly. RAZOR MULTI 250 Manual APR23.indd 19 RAZOR MULTI 250 Manual APR23.indd 19 6/04/2023 4:01:38 PM 6/04/2023 4:01:38 PM...
  • Page 20 Ensure the upper roller assembly is in the upright position. RAZOR MULTI 250 Manual APR23.indd 20 RAZOR MULTI 250 Manual APR23.indd 20 6/04/2023 4:01:38 PM 6/04/2023 4:01:38 PM...
  • Page 21 15. Connect the plug into a power point, then switch the 16. Prepare the torch for having wire fed through by machine ON. removing the gas nozzle and unscrewing the wire tip. RAZOR MULTI 250 Manual APR23.indd 21 RAZOR MULTI 250 Manual APR23.indd 21 6/04/2023 4:01:38 PM 6/04/2023 4:01:38 PM...
  • Page 22 Too much pressure WHEN IN MOTION. and you might experience wire birdnesting or feeding issues. Too much pressure can also deform the wire. RAZOR MULTI 250 Manual APR23.indd 22 RAZOR MULTI 250 Manual APR23.indd 22 6/04/2023 4:01:39 PM 6/04/2023 4:01:39 PM...
  • Page 23 22. Screw in the supplied gas hose to the outlet port of the 23. Plug the quick connect end of the gas hose to the port regulator. on the back of the machine. RAZOR MULTI 250 Manual APR23.indd 23 RAZOR MULTI 250 Manual APR23.indd 23 6/04/2023 4:01:40 PM 6/04/2023 4:01:40 PM...
  • Page 24 MIG push method is recommended for optimum weld mode selected using the WELD MODE button. quality. Release trigger to end the weld. RAZOR MULTI 250 Manual APR23.indd 24 RAZOR MULTI 250 Manual APR23.indd 24 6/04/2023 4:01:41 PM 6/04/2023 4:01:41 PM...

  • Page 25: Mig Welding Further Explained

    The heat of the arc melts the end of the wire slightly as it feeds towards the base metal. RAZOR MULTI 250 Manual APR23.indd 25 RAZOR MULTI 250 Manual APR23.indd 25 6/04/2023 4:01:41 PM...
  • Page 26 Side View Side View Flat, even weld profile, light penetration. Narrower weld profile, even penetration. Narrower and higher weld profile, more penetration. RAZOR MULTI 250 Manual APR23.indd 26 RAZOR MULTI 250 Manual APR23.indd 26 6/04/2023 4:01:42 PM 6/04/2023 4:01:42 PM...
  • Page 27 Even arc, good penetration Unstable arc, spatter, over heat Unstable arc, spatter, poor even fusion, good finish. contact tip. penetration and fusion. RAZOR MULTI 250 Manual APR23.indd 27 RAZOR MULTI 250 Manual APR23.indd 27 6/04/2023 4:01:42 PM 6/04/2023 4:01:42 PM...
  • Page 28 Argon-CO2 5/2 is a good all-round mix suitable for most applications. Argon-CO RAZOR MULTI 250 Manual APR23.indd 28 RAZOR MULTI 250 Manual APR23.indd 28 6/04/2023 4:01:42 PM...
  • Page 29 Using poor quality milled wire can result in poor performance and appearance. To ensure optimal performance when welding, use standards approved wire such as UNIMIG HYPERMIG wire. Use a smaller diameter wire for thin base metals. For thicker materials use a larger wire diameter and larger machine.
  • Page 30 Duty Cycle - CO2 60% @ 250A U41010 U41011 Duty Cycle - MIxed Gas 60% @ 220A Wire Size 0.8-1.2mm Standard EN60974-7 RAZOR MULTI 250 Manual APR23.indd 30 RAZOR MULTI 250 Manual APR23.indd 30 6/04/2023 4:01:43 PM 6/04/2023 4:01:43 PM...
  • Page 31 1.2 - 1.6mm TLY4M Yellow Aluminium Liner 4 Metre 1.2 - 1.6mm NKSTL Neck Spring for Aluminium DESCRIPTION U41013 M24 Torch Swan Neck RAZOR MULTI 250 Manual APR23.indd 31 RAZOR MULTI 250 Manual APR23.indd 31 6/04/2023 4:01:46 PM 6/04/2023 4:01:46 PM...

  • Page 32: Tig: Machine Setup

    (+) dinse port, and twist it to lock it in place. RAZOR MULTI 250 Manual APR23.indd 32 RAZOR MULTI 250 Manual APR23.indd 32 6/04/2023 4:01:47 PM 6/04/2023 4:01:47 PM...
  • Page 33 7. Connect gas hose to the flowmeter outlet using the on the back of the machine. twist nut to tighten the fitting securely. RAZOR MULTI 250 Manual APR23.indd 33 RAZOR MULTI 250 Manual APR23.indd 33 6/04/2023 4:01:47 PM 6/04/2023 4:01:47 PM...
  • Page 34 11. Select TIG mode using the WELD MODE button 12. Connect earth clamp to your workpiece. located on the front panel. Then input your desired settings for amperage. RAZOR MULTI 250 Manual APR23.indd 34 RAZOR MULTI 250 Manual APR23.indd 34 6/04/2023 4:01:48 PM 6/04/2023 4:01:48 PM...
  • Page 35 13. Press the button on the torch to initiate the gas flow. 14. Touch the tip of the tungsten to the workpiece. 15. Lift the torch up slightly to initiate the arc. RAZOR MULTI 250 Manual APR23.indd 35 RAZOR MULTI 250 Manual APR23.indd 35 6/04/2023 4:01:48 PM...

  • Page 36: Tig Welding Guide

    & direction, the arc will ignite as the hold momentarily. tungsten lifts off the work. RAZOR MULTI 250 Manual APR23.indd 36 RAZOR MULTI 250 Manual APR23.indd 36 6/04/2023 4:01:48 PM 6/04/2023 4:01:48 PM...
  • Page 37 Add TIG filler wire Gas shield Add TIG filler wire Move the torch forward to the Repeat the process front of the weld pool RAZOR MULTI 250 Manual APR23.indd 37 RAZOR MULTI 250 Manual APR23.indd 37 6/04/2023 4:01:49 PM 6/04/2023 4:01:49 PM...
  • Page 38 • Have better weld penetration Included • Have a narrower arc shape Flat spot angle diameter • Can handle more amperage without eroding RAZOR MULTI 250 Manual APR23.indd 38 RAZOR MULTI 250 Manual APR23.indd 38 6/04/2023 4:01:49 PM 6/04/2023 4:01:49 PM...
  • Page 39 12 - 180 2.4mm 15 - 150 15 - 250 3.2mm 20 - 200 20 - 300 3.2mm 25 - 250 25 - 350 RAZOR MULTI 250 Manual APR23.indd 39 RAZOR MULTI 250 Manual APR23.indd 39 6/04/2023 4:01:49 PM 6/04/2023 4:01:49 PM...

  • Page 40: Mma: Machine Setup

    4. Ensure that MMA mode is activated on the front panel machine ON. by pressing the WELD MODE button. Then set your desired amperage using ADJUSTMENT KNOB A. RAZOR MULTI 250 Manual APR23.indd 40 RAZOR MULTI 250 Manual APR23.indd 40 6/04/2023 4:01:50 PM 6/04/2023 4:01:50 PM...
  • Page 41 6. Place electrode into electrode holder. 7. Twist electrode holder to tighten and securely grip 8. Connect earth clamp to your workpiece. electrode. RAZOR MULTI 250 Manual APR23.indd 41 RAZOR MULTI 250 Manual APR23.indd 41 6/04/2023 4:01:50 PM 6/04/2023 4:01:50 PM...
  • Page 42 9. Strike electrode to the workpiece to initiate arc. 10. Drag along workpiece to weld. Pull the electrode away from the workpiece to finish weld. RAZOR MULTI 250 Manual APR23.indd 42 RAZOR MULTI 250 Manual APR23.indd 42 6/04/2023 4:01:50 PM...

  • Page 43: Mma: Welding Guide

    Covered electrodes serve many purposes in addition to adding filler metal to the molten pool. These additional functions are provided mainly by the covering on the electrode. RAZOR MULTI 250 Manual APR23.indd 43 RAZOR MULTI 250 Manual APR23.indd 43 6/04/2023 4:01:50 PM...
  • Page 44 In all cases, edges should be clean and free of any contaminates. The chosen application will determine the type of joint. RAZOR MULTI 250 Manual APR23.indd 44 RAZOR MULTI 250 Manual APR23.indd 44...

  • Page 45: Mig Troubleshooting

    5. Excessive penetration - Weld metal melting through base metal • Too much heat: Select a lower voltage range and/or adjust the wire speed to suit. Increase travel speed. RAZOR MULTI 250 Manual APR23.indd 45 RAZOR MULTI 250 Manual APR23.indd 45...
  • Page 46 • Wire crossed over on the spool or tangled: Remove the spool, untangle the wire or replace the wire. • Contaminated MIG wire: Use clean, dry, rust-free wire. Do not lubricate the wire with oil, grease etc. RAZOR MULTI 250 Manual APR23.indd 46 RAZOR MULTI 250 Manual APR23.indd 46...

  • Page 47: Tig Troubleshooting

    • Tungsten is contaminated: Remove 10mm of contaminated tungsten and re-grind the tungsten. • Arc length too long: Lower torch so that the tungsten is off of the work piece 2-5mm. RAZOR MULTI 250 Manual APR23.indd 47 RAZOR MULTI 250 Manual APR23.indd 47...

  • Page 48: Mma (Stick) Troubleshooting

    • Workpiece dirty, contaminated or moisture: Remove moisture and materials like paint, grease, oil, and dirt, including mill scale, from base metal. • Poor welding technique: Use the correct welding technique or seek assistance for the correct technique. RAZOR MULTI 250 Manual APR23.indd 48 RAZOR MULTI 250 Manual APR23.indd 48 6/04/2023 4:01:51 PM...
  • Page 49 Seek assistance for the correct joint design and fit up. 9. Electrode welds with different or unusual arc characteristic • Incorrect polarity: Change the polarity, check the electrode manufacturer for correct polarity. RAZOR MULTI 250 Manual APR23.indd 49 RAZOR MULTI 250 Manual APR23.indd 49 6/04/2023 4:01:51 PM...

  • Page 50: Factory Reset

    Service Support. WARNING: There are extremely dangerous voltage and power levels present inside this unit. Do not attempt to diagnose or repair unit by removing external cover unless you are an authorised repair agent for UNIMIG. 22. Error Codes Error Code...

  • Page 51: Wiring Diagrams

    RAZOR MULTI 250 OPERATING MANUAL 23. Wiring Diagrams RAZOR MULTI 250 Manual APR23.indd 51 RAZOR MULTI 250 Manual APR23.indd 51 6/04/2023 4:01:51 PM 6/04/2023 4:01:51 PM...

  • Page 52: Machine Breakdown And Parts List

    RAZOR MULTI 250 OPERATING MANUAL 24. Machine Breakdown and Parts List RAZOR MULTI 250 Manual APR23.indd 52 RAZOR MULTI 250 Manual APR23.indd 52 6/04/2023 4:01:53 PM 6/04/2023 4:01:53 PM...
  • Page 53 Display Board Support Plate 51000760 Main Transformer 51003302 51001760 Heat Sink 51001247 Transceiver 51001424 Filtering Capacitor 51000968 Polarity Switching Cable 51001565 9-Pin Socket Assembly RAZOR MULTI 250 Manual APR23.indd 53 RAZOR MULTI 250 Manual APR23.indd 53 6/04/2023 4:01:53 PM 6/04/2023 4:01:53 PM...
  • Page 54 RAZOR MULTI 250 OPERATING MANUAL Notes RAZOR MULTI 250 Manual APR23.indd 54 RAZOR MULTI 250 Manual APR23.indd 54 6/04/2023 4:01:54 PM 6/04/2023 4:01:54 PM...
  • Page 55 RAZOR MULTI 250 OPERATING MANUAL Notes RAZOR MULTI 250 Manual APR23.indd 55 RAZOR MULTI 250 Manual APR23.indd 55 6/04/2023 4:01:54 PM 6/04/2023 4:01:54 PM...
  • Page 56 FAX: (02) 9780 4210 FAX: (07) 3274 5829 FAX: (03) 9333 7867 FAX: (08) 9417 4781 EMAIL: sales@unimig.com.au EMAIL: qld@unimig.com.au EMAIL: sales@unimig.com.au EMAIL: wasales@unimig.com.au RAZOR MULTI 250 Manual APR23.indd 56 RAZOR MULTI 250 Manual APR23.indd 56 6/04/2023 4:01:54 PM 6/04/2023 4:01:54 PM...

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