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Summary of Contents for Cornwell Tools MMWM141I
- Page 1 MMWM141I OWNER’S MANUAL 2/2017 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 WELDER WARRANTY CORNWELL QUALITY TOOLS EFFECTIVE JANUARY 1, 2015 LIMITED WARRANTY This warranty applies to the original purchaser and is subject to the terms and conditions listed below. This Limited Warranty is for new equipment sold after the above date, providing coverage for defects in material and workmanship at the time it is shipped from the factory.
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Page 3: General Safety Rules
GENERAL SAFETY RULES WARNING: Read and understand all instructions. Failure to follow all instructions listed below may result in serious injury. CAUTION: Do not allow persons to operate or assemble this welder until they have read this manual and have developed a thorough understanding of how the welder works. WARNING: The warnings, cautions, and instructions discussed in this instruction manual cannot cover all possible conditions or situations that could occur. - Page 4 material being welded, ground or electrode from another welder. -Do not weld if you are in an awkward position. Always have a secure stance while welding to prevent accidents. Wear a safety harness if working above ground. -Do not drape cables over or around your body. -Wear a full coverage helmet with appropriate shade (see ANSI Z87.1 safety standard) and safety glasses while welding.
- Page 5 -Always use a helmet that covers your full face from the neck to top of head and to the back of each ear. -Use a lens that meets ANSI standards and safety glasses. For welders under 160 Amps output, use a shade 10 lens; for above 160 Amps, use a shade 12. Refer to the ANSI standard Z87.1 for more information.
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Page 6: Technical Specifications
Electromagnetic Field -Electromagnetic fields can interfere with various electrical and electronic devices such as pacemakers. -Consult your doctor before using any electric arc welder or cutting device -Keep people with pacemakers away from your welding area when welding. -Do not wrap cable around your body while welding. -Wrap MIG gun and ground cable together whenever possible. - Page 7 It features infinite wire feed speed control and voltage control giving you total control to tune in the arc you want. The MMWM141I also features a cooling fan and thermal overload protection to help protect your investment. The Inverter Technology is evident from the moment you take this unit out of the box.
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Page 8: Installation
Power Indicator When the unit is plugged in and the power switch on the back panel is in the “On” position, the power indicator light will come on indicating power has been applied to the unit. Thermal Overload Indicator If the duty cycle of the welder is exceeded the internal temperature will exceed safe temperatures and the machine will shut down. - Page 9 2. EXTENSION CORD - We do not recommend an extension cord because of the voltage drop they produce. This drop in voltage can affect the performance of the welder. If you need to use an extension cord, it must be a size #12 or larger. Check with a qualified electrician and your local electrical codes for your specific area.
- Page 10 NOTE: - Metal thinner than 24 gauge cannot be welded with this machine. Attempting to do so will cause burn through in the metal you are intending to weld. - Do not use rusty wire. Remove any wire that is rusty. If the whole spool is rusty, discard it and use another roll.
- Page 11 4.2.5 The welder can use either 4 inch or 8 inch spools. See the following figure for additional reference. The wing nut controls the tension on the spool. 8 Inch 4 Inch 4.2.6 Setting the wire spool tension. a) Turn the spool of wire with one hand. b) Increase the spool tension by tightening (turn clockwise) the wing nut while turning the spool.
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Page 12: Gas Installation
-The welding wire is electrically hot when the power is on and the torch trigger is activated. 4.2.16 Set the WIRE SPEED control to the middle of the wire speed range. 4.2.17 Straighten the MIG torch cable and pull the trigger in the gun handle to feed the wire through the torch assembly. - Page 13 6.2 Connect one end of the gas hose to the gas hose connection on the back of the welder. Connect the other end of the gas hose to the gas hose connection on the supplied regulator/flowgauge. 6.4 Before installing the regulator, it is good practice to make certain no debris is in the gas bottle connection.
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Page 14: Operation
OPERATION High voltage danger from power source! Consult a qualified electrician for proper installation of receptacle at the power source. This welder must be grounded while in use to protect the operator from electrical shock. If you are not sure if your outlet is properly grounded, have it checked by a qualified electrician. -
Page 15: Welding Techniques
6. DISTANCE FROM THE WORK PIECE - If the nozzle is held off the work piece, the distance between the nozzle and the work piece should be kept constant and should not exceed 1/4 inch or the arc may begin sputtering, signaling a loss in welding performance. 7. - Page 16 ELECTRIC SHOCK CAN KILL! To prevent ELECTRIC SHOCK, do not perform any welding while standing, kneeling, or lying directly on the grounded workpiece. 8.1 Moving the torch Torch travel refers to the movement of the torch along the weld joint and is broken into two elements: Direction and Speed.
- Page 17 8.3 Welding position FLAT POSITION is easiest of the welding positions and is most commonly used. 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.
- Page 18 falling into the nozzle. Angle B should be held at zero degrees so that the wire is aiming directly into the weld joint. If you experience excessive dripping of the weld puddle, select a lower heat setting. Also, the weave bead tends to work better than the stringer. 8.4 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.
- Page 19 8.5 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.
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Page 20: Maintenance
MAINTENANCE • Maintain your welder. It is recommended that the general condition of any welder be examined before it is used. Keep your welder in good repair by adopting a program of conscientious repair and maintenance. Have necessary repairs made by qualified service personnel. •... -
Page 21: Diagram & Parts List
DIAGRAM & PARTS LIST Page of 24... - Page 22 105200241 WELD OUTPUT CONNECTOR - NEGATIVE 105200242 WELD OUTPUT CONNECTOR - POSITIVE 155200009 DOOR 155200010 WELD SET-UP CHART MMWM141I 105200080 DOOR LATCH 105200243 CENTER PANEL 155200011 OPERATOR'S MANUAL MMWM141I For replacement parts or technical questions, please contact our welder help line at 1-888-762-4045.
- Page 23 Page of 24...
- Page 24 Distributed by CORNWELL QUALITY TOOLS 667 SEVILLE RD WADSWORTH OH 44281 www.conwelltools.com Made in China Page of 24...
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