Ryobi MMA-140 Owner's Operating Manual
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Ryobi MMA-140 Owner's Operating Manual

Ryobi MMA-140 Owner's Operating Manual

Mma inverter welder
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Rated input power supply......................................................AC 230V±5% 50/60Hz
Rated input capacity......................................................................................5.3KVA
Current adjustment range........................................................................... 20-140A
Rated duty cycle................................................................................................ 80%
Rated voltage..........................................................................................20.8-25.6
No load voltage.................................................................................................. 63V
Overall efficiency................................................................................................80%
Housing protection grade................................................................................IP21S
Power factor.............................................................................................. 0.73 cosφ
Insulation grade...................................................................................................... F
Electrode diameter...................................................................................1.6-3.2mm
Noise......................................................................................................... <70dB(A)
Dimensions............................................................................... 287 x 120 x 247mm
Net weight........................................................................................................ 3.8kg
THANK YOU FOR BUYING A RYOBI
Your new inverter generator has been engineered and manufactured to Ryobi's
high standard of dependability, ease of operation and operator safety. Properly
cared for, it will give you years of rugged, trouble free performance. If you use
your inverter generator properly and only for what it is intended, you will enjoy
years of safe, reliable service.
CAUTION: Carefully read through this entire owner' s
KE E P THIS MANUAL FOR FUTURE RE FE RE NCE
OWNER'S OPERATING MANUAL
MMA INVERTER WELDER
MODEL MMA-140
SPE CIFICATIONS
MMA INVERTER WELDER
manual, paying close attention to the general
safety rules and rules for safe operation,
before using.
1
V

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Summary of Contents for Ryobi MMA-140

  • Page 1 THANK YOU FOR BUYING A RYOBI MMA INVERTER WELDER Your new inverter generator has been engineered and manufactured to Ryobi’s high standard of dependability, ease of operation and operator safety. Properly cared for, it will give you years of rugged, trouble free performance. If you use your inverter generator properly and only for what it is intended, you will enjoy years of safe, reliable service.

  • Page 2: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS The purpose of safety rules is to attract your 3. Do not coil or drape cables around your body. attention to possible dangers. The safety symbols 4. Keep welding power source and cables as far and the explanations with them, require your away from operator as practical.
  • Page 3 IMPORTANT SAFETY INSTRUCTIONS...

  • Page 4: Electric Shock

    IMPORTANT SAFETY INSTRUCTIONS 13. In confined spaces or damp locations, do not ELECTRIC SHOCK use a welder with AC output unless it is Can Kill equipped with a voltage reducer. Use equipment with DC output. 14. Wear a safety harness to prevent falling if Touching live electrical parts can cause fatal working above floor level.
  • Page 5 IMPORTANT SAFETY INSTRUCTIONS FLYING SPARKS WELDING Can Can Cause Injury Cause Fire or Injury FLYING SPARKS AND HOT METAL can cause WELDING can cause fire or explosion. injury. Sparks and spatter fly off from the welding arc. Chipping and grinding cause flying metal. The flying sparks and hot metal, weld spatter, hot workpiece, and hot equipment can cause As welds cool, they can throw off slag.
  • Page 6 IMPORTANT SAFETY INSTRUCTIONS MOVING PARTS SPARKS Can Cause Can Cause Injury BATTERY GASES TO EXPLODE Moving parts, such as fans, rotors, and belts can cut fingers and hands and catch loose STEAM AND PRESSURIZED HOT COOLANT clothing. can burn face, eyes, and skin. Keep all doors, panels, covers, and guards The coolant in the radiator can be very hot and closed and securely in place.
  • Page 7 IMPORTANT SAFETY INSTRUCTIONS ELECTRIC AND FOR ELECTRICALLY MAGNETIC FIELDS Powered Equipment May Be Dangerous Turn off input power using the disconnect switch at the fuse box before working on the Electric current flowing through any conductor equipment. causes localized Electric and Magnetic Fields (EMF).

  • Page 8: Additional Safety Instructions

    If you have a problem with the machine contact 22. Before installation, inspection, or service of your local RYOBI dealer. equipment, shut OFF all power and remove line fuses to prevent accidental turning ON 10.

  • Page 9: Installation

    ADDITIONAL SAFETY INSTRUCTIONS 24. If, in an emergency, it must be disconnected, 26. Fully insulated lock-type connectors should be guard against shock burns, or flash from switch used to join welding cable. arcing. Always shut OFF and disconnect all 27. Frequently inspect cables for wear, cracks and power to equipment.

  • Page 10: Duty Cycle

    INSTALLATION CONNECTION OF INPUT CABLE The Mains supply voltage should be within ± 5% of In order to ensure personal safety and avoid the rated Mains supply voltage. Too low a electric shock, please ground the machine reliably voltage may cause poor welding performance. Too by connecting the ground wire of the machine to high a supply voltage will cause components to the grounding device in the switching box.
  • Page 11 ELECTROMAGNETIC COMPATIBILITY The health of people around, e.g. the use of Welding Cables pacemakers and hearing aids. The welding cables should be kept as short as Equipment used for calibration and possible and should be positioned close measurement. together, running at or close to the floor level. The time of day that welding or other activities Equipotential Bonding are to be carried out.

  • Page 12: Symbol Chart

    SYMBOL CHART...
  • Page 13 DE SCRIPTION 1. Carry handle 8. Electrode holder 2. On/Off switch 9. Earth clamp 3. Current control knob 10. Chipping hammer and wire brush 4. Power indicator 11. Cooling fan 5. Thermal cutout indicator 12. Power lead 6. Earth clamp connection point (- negative) 13.
  • Page 14 UNPACKING CAUTION. This packaging contains If any parts are found to be missing, the machine sharp objects. Take care when and its accessories should be returned together in unpacking. Remove the machine, their original packaging to the retailer. Do not throw together with the accessories supplied, from the the packaging away, keep it safe throughout the packaging.

  • Page 15: Operation

    ASSEMBLY Note: Before carrying out any assembly or disassembly of the unit please ensure that the unit is not connected to the electrical supply. Round ASSEMBLING THE WELDING MASK Attach the handle to the Welding Shield by lining up the two rectangular tabs on the handle with the corresponding holes in the welding shield and: Handle A.
  • Page 16 OPERATION Important: Ensure also that the earth clamp is attached to clean, solid metal. If necessary thoroughly clean with a wire brush or similar to guarantee a good connection. The earth clamp must only be connected to the work piece. The area to be welded must be clean and free from dirt, rust, paint, grease and oil.

  • Page 17: Stick (Mmaw) Basic Welding Technique

    STICK (MMAW) BASIC WELDING TECHNIQUE A WORD TO BEGINNERS For those who have not yet done any welding, the simplest way to commence is to run beads on a piece of scrap plate. Use mild steel plate about 6.0mm thick and a 3.2mm electrode. Clean any paint, loose scale or grease off the plate and set it firmly on the work bench so that welding can be carried out in the downhand position.

  • Page 18: Arc Length

    STICK (MMAW) BASIC WELDING TECHNIQUE ARC LENGTH The securing of an arc length necessary to produce a neat weld soon becomes almost automatic. You will find that a long arc produces more heat. A very long arc produces a crackling or spluttering noise and the weld metal comes across in large, irregular blobs.

  • Page 19: Care Of Electrodes

    STICK (MMAW) BASIC WELDING TECHNIQUE Weld penetration is low and the quality of the weld Basic electrodes contain a high proportion of deposit is highly dependent on the skill of the calcium carbonate (limestone) and calcium fluoride welder. (fluorspar) in the coating. This makes their slag coating more fluid than rutile coatings - this is also TYPES OF FLUX/ELECTRODES fast-freezing which assists welding in the vertical...

  • Page 20: Stick (Mmaw) Welding Troubleshooting

    STICK (MMAW) WELDING TROUBLESHOOTING Problem Possible Cause Remedy Control knob is set at a value that Reduce the control knob until welding Welding current causes the welding current to vary current is reasonably constant while varying. excessively with the arc length. prohibiting the electrode from sticking to the workpiece when you “dig”...
  • Page 21 STICK (MMAW) WELDING TROUBLESHOOTING Problem Possible Cause Remedy Small electrodes used on heavy Use larger electrodes and preheat the Portions of the weld run cold plate. plate. do not fuse to the surface of the metal or Welding current is too low. Increase welding current.

  • Page 22: Routine Maintenance

    WARNING. Do not open this machine NEVER use any dark filter lens other than that and do not introduce anything into its provided by RYOBI, or one with the same certified openings. Power supply must be ‘Optical class’ (degree of protection).

  • Page 23: Troubleshooting

    TROUBLESHOOTING DANGER! Follow all safety precautions whenever diagnosing or servicing the tool. Dis connect power supply before service. Problem Possible Cause Remedy The welding arc cannot The primary supply voltage has not Switch ON the primary supply voltage. been switched ON. be established.
  • Page 24 TROUBLESHOOTING Problem Possible Cause Remedy Bad weld connections. Clean and tighten weld connections. Erratic or improper arc or welding output. Polarity incorrect. Connect polarity correctly. Workpiece painted or dirty. Clean workpiece thoroughly. Nozzle obstructed by welding Clean or replace nozzle. spatter.
  • Page 25 SYMBOLS Symbols and Technical Data EN 60974-1 European standard relating to Welding Power Supply’s for limited use MMA-140 Type ID Single phase transformer Symbol for manual arc welding and covered electrodes 50Hz Nominal mains frequency Ø Diameter of electrodes No load voltage …A/…V to …A/…V...
  • Page 26 NOTES...
  • Page 27 NOTES...

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