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BRIMA MIG 250-1 Operator's Manual

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OPERATORS' MANUAL
MIG 250-1
INVERTER MIG Welding Machine
IMPORTANT: Read this Owner's Manual Completely before attempting to use this
equipment. Save this manual and keep it handy for quick reference. Pay particular
attention to the safety instructions we have provided for your protection. Contact your
distributor if you do not fully understand this manual.

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  • Page 1 OPERATORS’ MANUAL MIG 250-1 INVERTER MIG Welding Machine IMPORTANT: Read this Owner’s Manual Completely before attempting to use this equipment. Save this manual and keep it handy for quick reference. Pay particular attention to the safety instructions we have provided for your protection. Contact your...

  • Page 2: Table Of Contents

    CONTENT CONTENT §1 Safety · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 1 §1.1 Symbols Explanation ·...

  • Page 3: Safety

    SAFETY §1 Safety Welding and cutting equipment can be dangerous to both the operator and people in or near the surrounding working area, if the equipment is not correctly operated. Equipment must only be used under the strict and comprehensive observance of all relevant safety regulations.
  • Page 4 SAFETY ELECTRIC SHOCK CAN KILL Touching live electrical parts can cause fatal shocks or severe burns. The electrode and work circuit is electrically live whenever the output is on. The input power circuit and internal machine circuits are also live when power is on. In MIG/MAG welding, the wire, drive rollers, wire feed housing, and all metal parts touching the welding wire are electrically live.
  • Page 5 SAFETY should you get an electric shock! FUMES AND GASES CAN BE DANGEROUS Smoke and gas generated whilst welding or cutting can be harmful to people’s health. Welding produces fumes and gases. Breathing these fumes and gases can be hazardous to your health. ...
  • Page 6 SAFETY them not to watch the arc nor expose themselves to the arc rays or to hot spatter or metal. 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.
  • Page 7 SAFETY  Do not heat, cut or weld tanks, drums or containers until the proper steps have been taken to insure that such procedures will not cause flammable or toxic vapors from substances inside. They can cause an explosion even though they have been “cleaned”. ...

  • Page 8: Gas Cylinders

    SAFETY  Valve protection caps should always be in place and hand tight except when the cylinder is in use or connected for use. Gas Cylinders. Shielding gas cylinders contain gas under high pressure. If damaged, a cylinder can explode. Because gas cylinders are normally part of the welding process, be sure to treat them carefully.

  • Page 9: Noise Can Damage Hearing

    SAFETY  Never coil the power cable around your body.  Make sure welding machine and power cable to be far away from the operator as far as possible according to the actual circumstance.  Connect the work cable to the workpiece as close as possible to the area being welded.

  • Page 10: Emc Measure

    SAFETY §1.4 EMC measure In the special situation, the specified area may be affected, the standard of radiation limit value has been complied with (eg: The device, which is easy effected by electromagnetism, is used at the installation location, or there is radio or TV near the installation location).

  • Page 11: Overview

    3. Waveform control, stable welding arc; 4. IGBT technology, low power dissipation; 5. Rated duty circle: MIG 250-1 is 60% (40℃). MIG SERIES arc welding machine is suitable for all positions welding for various plates made of stainless steel, carbon steel, alloyed steel etc, which is also applied to pipe installment, mould mend, petrochemical, architecture decoration, car repair, bicycle, handicraft and common manufacture.

  • Page 12: Technical Data

    OVERVIEW §2.2 Technical Data Models MIG 250-1 Parameters Input Voltage (V) 1~220/230/240± 10% Frequency (HZ) 50/60 Input Current (A) Input Power (KW) Welding Current (A) 50-250 Welding Voltage (V) 16.5-26.5 No-load Voltage (V) 60% 250A Duty cycle (40℃) 100% 200A Fe: 0.6、0.8、0.9、1.0 、1.2...

  • Page 13: Working Principle

    OVERVIEW the over-heat pilot lamp on the front panel. In that case, the machine should not be operated for 10-15 minutes to cool down with the fanrunning. When operating the machine again, the welding output current or the duty cycle should be reduced. §2.4 Working Principle The working principle of MIG SERIES arc welding machine is shown as the following figure.

  • Page 14: Panel Functions & Descriptions

    PANEL FUNCTIONS & DESCRIPTIONS §3 Panel Functions & Descriptions §3.1 Machine Layout Description Front and rear panel layout of welding machine 1. MIG torch euro connector. 2. Negative (-) Output socket. 3. Gas Inlet. 4. Power switch. 5. Input power cable. 6.

  • Page 15: Control Panel Of Welding Machine

    PANEL FUNCTIONS & DESCRIPTIONS §3.2 Control Panel of welding machine 1. LH digital display: Show welding voltage, during welding it shows welding voltage. 2. RH digital display: Show wire speed or welding current, during welding it shows welding current. 3. Wire feed indicator. 4.
  • Page 16 PANEL FUNCTIONS & DESCRIPTIONS Controls Explained Alarm Indicator (6) Illuminates when the power supply has exceeded duty-cycle and entered an over-temperature condition. The unit will automatically reset once cooled and lamp will go off. LH parameter knob (7) Rotate the knob to adjust welding voltage. Range: 0-10. RH parameter knob (8) Rotate the knob to adjust welding current or wire speed (M/Min).

  • Page 17: Installation & Operation

    INSTALLATION & OPERATION §4 Installation & Operation §4.1 Installation & Operation for MIG Welding §4.1.1 Set up installation for MIG Welding- Gas shielded wire (1) Insert the earth cable plug into the negative socket on the front of the machine and tighten it.
  • Page 18 INSTALLATION & OPERATION (6) Place wire onto spool holder - (spool retaining nut is left hand thread) Feed the wire through the inlet guide tube on to the drive roller. (7) Carefully feed the wire over the drive roller into the outlet guide tube, feed through about ½”...
  • Page 19 INSTALLATION & OPERATION (10) Remove Tip (11) Press and hold manual wire button to feed wire down torch cable through to torch head. (12) Fit the correct size contact tip (13) Fit the nozzle to the torch head. over the wire and fasten tightly into the tip holder.

  • Page 20: Wire Feed Roller Selection

    INSTALLATION & OPERATION (16) Select the required welding parameters using the knobs and button. §4.1.2 Wire Feed Roller Selection The importance of smooth consistent wire feeding during MIG welding cannot be emphasized enough. Simply put the smoother the wire feed then the better the welding will be.

  • Page 21: Wire Installation And Set Up Guide

    INSTALLATION & OPERATION wire. Softer wires also require less tension from the top pressure roller to avoid deforming the shape of the wire, too much tension will push the wire out of shape and cause it to catch in the contact tip. Flux Core / Gasless Wire - these wires are made up of a thin metal sheath that has fluxing and metal compounds layered onto it and then rolled into a cylinder to form the finished wire.
  • Page 22 INSTALLATION & OPERATION...
  • Page 23 INSTALLATION & OPERATION...

  • Page 24: Mig Welding

    INSTALLATION & OPERATION §4.1.4 MIG Welding Definition of MIG Welding MIG (metal inert gas) welding also known as GMAW (gas metal arc welding) or MAG (metal active gas welding), is a semi-automatic or automatic arc welding process in which a continuous and consumable wire electrode and a shielding gas are fed through a welding gun.
  • Page 25 INSTALLATION & OPERATION The wire approaches the work The wire cannot support all The current flow creates a piece and touches the work the current flow, resistance magnetic field that begins to creating a short circuit between builds up and the wire pinch melting wire...
  • Page 26 INSTALLATION & OPERATION Basic MIG Welding Good weld quality and weld profile depends on gun angle, direction of travel, electrode extension (stick out), travel speed, thickness of base metal, wire feed speed and arc voltage. To follow are some basic guides to assist with your setup. Gun Position - Travel Direction, Work Angle: Gun position or technique usually refers to how the wire is directed at the base metal, the angle and travel direction chosen.
  • Page 27 INSTALLATION & OPERATION Narrow higher weld Flat even weld profile Narrower weld profile profile more light penetration even penetration penetration Travel Angle - Travel angle is the right to left angle relative to the direction of welding. A travel angle of 5° - 15° is ideal and produces a good level of control over the weld pool. A travel angle greater than 20°...
  • Page 28 INSTALLATION & OPERATION Correct angle Not enough angle Too much angle good level of control less control over the weld poor control, unstable over the weld pool, pool more spatter. arc, less penetration, lots even flat weld. of spatter. Stick Out- Stick out is the length of the unmelted wire protruding from the end of the contact tip.
  • Page 29 INSTALLATION & OPERATION quickly trapping gases inside the weld metal causing porosity. Undercutting of the base metal can also occur and an unfilled groove in the base metal is created when the travel speed is too fast to allow molten metal to flow into the weld crater created by the arc heat.
  • Page 30 INSTALLATION & OPERATION Wire types and sizes - Use the correct wire type for the base metal being welded. Use stainless steel wire for stainless steel, Aluminum wires for Aluminum and steel wires for steel. Use a smaller diameter wire for thin base metals. For thicker materials use a larger wire diameter and larger machine, check the recommended welding capability of your machine.
  • Page 31 INSTALLATION & OPERATION unstable arc conditions. Too high flow can cause air to be drawn into the gas column and contaminate the weld zone. Use the correct shielding gas. CO is good for steel and offers good penetration characteristics, the weld profile is narrower and slightly more raised than the weld profile obtained from Argon CO mixed gas.

  • Page 32: Diagram For Gun

    INSTALLATION & OPERATION §4.1.5 Diagram for Gun...
  • Page 33 INSTALLATION & OPERATION...
  • Page 34 INSTALLATION & OPERATION...

  • Page 35: Operation Environment

    INSTALLATION & OPERATION §4.2 Operation environment ▲Height above sea level ≤1000 M. ▲Operation temperature range -10～+40° C. ▲Air relative humidity is below 90% (20° C). ▲Preferable site the machine some angles above the floor level, the maximum angle does not exceed 15℃. ▲Protect the machine against heavy rain and against direct sunshine.

  • Page 36: Maintenance & Troubleshooting

    MAINTENANCE & TROUBLESHOOTING §5 Maintenance & Troubleshooting §5.1 Maintenance In order to guarantee safe and proper operation of welding machines, they must be maintained regularly. Let customers understand the maintenance procedure of welding machines. Enable customers to carry on simple examination and inspections. Do your best to reduce the fault rate and repair times of welding machines to lengthen service life of arc welding machine.

  • Page 37: Troubleshooting

    MAINTENANCE & TROUBLESHOOTING Using the dry compressed air to clear the inside of arc welding machine. Especially for clearing up the dusts on radiator, main voltage transformer, inductors, IGBT modules, fast recover diodes, PCB’s, etc. Monthly examination Check the screws and bolts in the machine. If any is loose, please screw it tight. If it is shaved, please replace.

  • Page 38: Mig Welding Trouble Shooting

    MAINTENANCE & TROUBLESHOOTING No gas in the gas cylinder Change it No output Press the Gas hose leaks gas Change it gas when gun switch, test gas Electromagnetic valve Change it no output damaged shielded Output gas Control switch damaged Repair the switch when test Control circuit damaged...
  • Page 39 MAINTENANCE & TROUBLESHOOTING Voltage too high Select a lower voltage setting select the correct polarity for the wire Wrong polarity set being used - see machine setup guide Stick out too long Bring the torch closer to the work Remove materials like paint, grease, Contaminated base metal oil, and dirt, including mill scale from base metal...

  • Page 40: Mig Wire Feed Trouble Shooting

    MAINTENANCE & TROUBLESHOOTING Bring the torch closer to the work and Holding the torch too far away maintain stick out of 5-10mm Wire stubbing Welding voltage set too low Increase the voltage during welding Wire Speed set too high Decrease the wire feed speed Remove materials like paint, grease, Contaminated base metal oil, and dirt, including mill scale from...
  • Page 41 MAINTENANCE & TROUBLESHOOTING should be strictly adhered to and followed. Trouble Possible Reason Suggested Remedy Check that the TIG/MMA/MIG selector Wrong mode selected switch set to MIG position Check that the Wire Feeder /Spool Gun No wire feed selector switch is set to Wire Feeder Wrong torch selector switch position for MIG welding and Spool Gun when using the Spool gun...

  • Page 42: List Of Error Code

    MAINTENANCE & TROUBLESHOOTING §5.5 List of error code Error Type Error code Description Lamp status Yellow lamp (thermal Over-heating (1st thermal relay) protection) always on Yellow lamp (thermal Over-heating (2nd thermal relay) protection) always on Yellow lamp (thermal Thermal relay Over-heating (3rd thermal relay) protection) always on Yellow lamp (thermal...

  • Page 43: Electrical Schematic Drawing

    MAINTENANCE & TROUBLESHOOTING §5.6 Electrical schematic drawing...

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