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Magnum MMWMP143i Owner's Manual

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OWNER'S MANUAL
MMWMP143i
WARNING:
Read carefully and understand all ASSEMBLY
AND OPERATION INSTRUCTIONS before
operating. Failure to follow the safety rules and
other basic safety precautions may result in
serious personal injury.

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Summary of Contents for Magnum MMWMP143i

  • Page 1 OWNER’S MANUAL MMWMP143i WARNING: Read carefully and understand all ASSEMBLY AND OPERATION INSTRUCTIONS before operating. Failure to follow the safety rules and other basic safety precautions may result in serious personal injury.

  • Page 2: General Safety Instruction

    Operating Instructions and Parts Manual Please read and save these instructions. Read through this owner’s manual carefully before using product. Protect yourself and others by observing all safety information, warnings, and cautions. Failure to comply with instructions could result in personal injury and/or damage to product or property.
  • Page 3 GENERAL SAFETY INSTRUCTION -Wear proper gloves and protective clothing to prevent your skin from being exposed to hot metals, UV and IR rays. -Do not overuse or overheat your welder. Allow proper cooling time between duty cycles. -Keep hands and fingers away from moving parts and stay away from the drive rolls.
  • Page 4 GENERAL SAFETY INSTRUCTION The welding arc produces ultraviolet (UV) and infrared (IR) rays that can cause injury to your eyes and skin. Do not look at the welding arc without proper eye protection. -Always use a helmet that covers your full face from the neck to top of head and to the back of each ear.
  • Page 5 GENERAL SAFETY INSTRUCTION Welding creates hot sparks that can cause injury. Chipping slag off welds creates flying debris. -Wear protective apparel at all times: ANSI-approved safety glasses or shield, welder’s hat and ear plugs to keep sparks out of ears and hair. Electromagnetic Field -Electromagnetic fields can interfere with various electrical and electronic devices such as pacemakers.
  • Page 6 GENERAL SAFETY INSTRUCTION Description The Cornwell MMWMP143i is an Inverter-Powered wire feed welder for Flux Core, MIG, DC STICK (Optional Purchase- MMW105200087) and DC TIG.(Optional Purchase- MMWACTT1) It uses Leading edge Inverter Technology to provide high quality welds that are crisp, clean and consistent with plenty of power.
  • Page 7 GENERAL SAFETY INSTRUCTION Specifications and Dimension Description Specification Model MMWMP143i Input power Frequency 50/60 Rated input current 13.5 Rated input capacitance No-load voltage MIG:15.5-18.5V; STICK:21.2-23V; Rated working voltage TIG:11-14.4V; MIG:30～140A welding current STICK:30～75A TIG:25～110A Rated duty cycle MIG:30; STICK:40 TIG:20 MIG:30%@90A;...

  • Page 8: Know Your Welder

    GENERAL SAFETY INSTRUCTION Insulation class Enclosure protection Cooling type Fan cooled Machine dimensions 18.70 X 9.44 X 14.76 Inch L×W×H Weight 26.45 Know your Welder Power switch Selection Switch Wire s peed Welding Voltage Enclosure Output socket...

  • Page 9: Welding Voltage

    GENERAL SAFETY INSTRUCTION SELECTION SWITCH Welding mode selection(MIG or lift TIG or MMA) POWER INDICATOR When the machine is turned on, the power indicator will be on. ALARM INDICATOR When the thermal indictor is on, it shows the machine is overloaded and the internal temperature is too high.
  • Page 10 GENERAL SAFETY INSTRUCTION 2. Extension cord During normal use an extension cord is not necessary. It is strongly recommended that an extension cord should not be used because of the voltage drop they produce. This drop in voltage can affect the performance of the welder.

  • Page 11: Operation

    GENERAL SAFETY INSTRUCTION 4. Ground clamp connection Clear any dirt, rust, scale, oil or paint on the ground clamp. Make certain you have a good solid ground connection. A poor connection at the ground clamp will waste power and heat. Make sure the ground clamp touches the metal.
  • Page 12 GENERAL SAFETY INSTRUCTION Voltage selector - The voltage selector controls the welding heat. This unit has infinite voltage control. Refer to the label inside the welder side door for recommended voltage selector settings for your welding job. Wire speed control - The wire speed control adjusts the speed at which the wire is fed out of the welding torch.

  • Page 13: Welding Techniques

    GENERAL SAFETY INSTRUCTION done before starting each welding job or whenever any of the following variables are changed: heat setting, wire diameter, or wire type. EXPOSURE TO A WELDING ARC IS EXTREMELY HARMFUL TO THE EYES AND SKIN! Prolonged exposure to the welding arc can cause blindness and burns. Never strike an arc or begin welding until you are adequately protected.
  • Page 14 GENERAL SAFETY INSTRUCTION Moving the torch too fast, too slow, or erratically will prevent proper fusion or create a lumpy, uneven bead. Travel direction is the direction the torch is moved along the weld joint in relation to the weld puddle. The torch is either PUSHED into the weld puddle or PULLED away from the weld puddle.
  • Page 15 GENERAL SAFETY INSTRUCTION It is best if you can weld in the flat position if at all possible as good results are easier to achieve. HORIZONTAL POSITION Is performed very much the same as the flat weld except that angle B (see HOLDING THE TORCH) is such that the wire, Directed more toward the metal above the weld joint is to help prevent the weld puddle from running downward while still allowing slow enough travel speed .A good starting point for angle B is about 30 degrees DOWN from being perpendicular to...
  • Page 16 GENERAL SAFETY INSTRUCTION 6.4 Multiple pass welding Butt Weld Joints When butt welding thicker materials you will need to prepare the edges of the material to be joined by grinding a bevel on the edge of one or both pieces of the metal being joined. When this is done, a “V” is created between the two pieces of metal that will have to be welded closed.
  • Page 17 GENERAL SAFETY INSTRUCTION 6.5 Spot welding There are three methods of spot welding: Burn-Through, Punch and Fill, and Lap. Each has advantages and disadvantages depending on the specific application as well as personal preference. 1. The BURN-THROUGH METHOD welds two overlapped pieces of metal together by burning through the top piece and into the bottom piece.
  • Page 18 Dc Stick Welding Assembly (optional purchase - mmw105200087) Be aware that the ELECTRODE HOLDER will be electrically hot when the input Power switch is turned on. 1. Install the ground cable to the Negative Weld output Connector. 2. Secure the ground clamp to the work piece. 3.
  • Page 19 GENERAL SAFETY INSTRUCTION 6.6 Spot welding instructions 1. Select the wire diameter and heat setting recommended above for the method of spot welding you intend to use. 2. Tune in the wire speed as if you were going to make a continuous weld. 3.
  • Page 20 GENERAL SAFETY INSTRUCTION The best way to teach yourself how to weld is with short periods of practice at regular intervals. All practice welds should be done on scrap metal that can be discarded. Do not attempt to make any repairs on valuable equipment until you have satisfied yourself that your practice welds are of good appearance and free of slag .

  • Page 21: Troubleshooting Chart

    GENERAL SAFETY INSTRUCTION As the coating on the outside of the electrode burns off, it forms an envelope of protective around the weld. This prevents air from reaching the molten metal and creating an undesirable chemical reaction. The burning coating, however, forms slag. The slag formation appears as an accumulation of dirty metal scale on the finished weld.
  • Page 22 GENERAL SAFETY INSTRUCTION not working Wire broken or Replace or repair the fan or turning falling off very slowly Too large contact Check the connection tip makes the current unsteady Too thin power Change the proper contact tip or cable makes the roller power astaticism Too low input...
  • Page 23 GENERAL SAFETY INSTRUCTION Main Circuit chart...

  • Page 24: General Safety Instruction

    GENERAL SAFETY INSTRUCTION Spare part list Parts List CODE DESCRIPTION Latch 105200080 Left panel 155200125 Wire Spool 105200009...
  • Page 25 GENERAL SAFETY INSTRUCTION Wire feeder 105200053 Wire feeder plate 155200089 Front Panel PCB 155200112 Front panel fixing plate 155200110 MIG Gun Clamp 155200111 MIG Gun Clamp 155200111 Knob 105200063 Welding Function Select Switch 105200453 Cable clip 105300154 Quick connector 125300100 Plastic front panel 105500092 Feet...

  • Page 26: Power Switch

    GENERAL SAFETY INSTRUCTION Wind Deflector 155200118 Heat Sink Support 155200119 105200468 Back panel 155200120 Power Cord 155200121 Cable Clamp 105200112 Gas Connector 105200441 Gas Valve Connector 155200122 Power switch 105300155 Plastic back panel 105500091 Middle Plate 155200123 Enclosure 155200007 Handle 155200093 Service，...
  • Page 27 GENERAL SAFETY INSTRUCTION MINOR AND ROUTINE MAINTENANCE Temperature range from 10°F~120°F and the relative humidity not more than 90%. When transporting or storing the welder after use, it is recommended to repack the product as it was received for protection. (Cleaning is required before storage and you must seal the plastic bag in the box for storage.)

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