Table of Contents
Advertisement
Quick Links
MMIG125
Flux-cored 125 Amp Welder
Assembly & Operating Instructions
READ ALL INSTRUCTIONS AND WARNINGS BEFORE USING THIS PRODUCT.
This manual provides important information on proper operation & maintenance. Every effort has been
made to ensure the accuracy of this manual. These instructions are not meant to cover every possible
condition and situation that may occur. We reserve the right to change this product at any time
without prior notice.
IF THERE IS ANY QUESTION ABOUT A CONDITION BEING SAFE OR UNSAFE, DO
NOT OPERATE THIS PRODUCT!
HAVE QUESTIONS OR PROBLEMS? DO NOT RETURN THIS PRODUCT TO THE
RETAILER - CONTACT CUSTOMER SERVICE.
If you experience a problem or need parts for this product, visit our website http://www.buffalotools.com
or call our customer help line at 1-888-287-6981, Monday-Friday, 8 AM - 4 PM Central Time. A copy of
the sales receipt is required.
FOR CONSUMER USE ONLY – NOT FOR PROFESSIONAL USE.
KEEP THIS MANUAL, SALES RECEIPT & APPLICABLE WARRANTY FOR FUTURE
REFERENCE.
Advertisement
Table of Contents
Summary of Contents for Buffalo MMIG125
- Page 1 MMIG125 Flux-cored 125 Amp Welder Assembly & Operating Instructions READ ALL INSTRUCTIONS AND WARNINGS BEFORE USING THIS PRODUCT. This manual provides important information on proper operation & maintenance. Every effort has been made to ensure the accuracy of this manual. These instructions are not meant to cover every possible condition and situation that may occur.
- Page 2 GENERAL PRODUCT SPECIFICATIONS SPECIFICATIONS • Thermal Overload Protection • Output: 80A (rated current)@18V-20%, 125A (peak current) • Input: 120V, 60Hz, 20A, 1Ph • Duty Cycle 20%@80 AMPS • Wire Size: .030 - .035 Inch • Heat Settings: Two • MAX Metal Thickness: 18 Gauge / 3/16" FEATURES: •...
-
Page 3: Safety Summary
SAFETY SUMMARY TABLE OF CONTENTS Note: • The following safety alert symbols The warnings, cautions and instructions dis- identify important safety messages in this cussed in this instruction manual cannot manual. cover all possible conditions or situations that • When you see one of the symbols shown here, be alert to the possibility of person- could occur. -
Page 4: Shock Hazards
SHOCK HAZARDS into the power source if the ground prong on power cord plug is bent over, broken off, or missing. WARNING • Do not allow the welder to be connected to the power source or attempt to weld if the welder, welding cables, welding site, or welder power cord are exposed to any ELECTRIC SHOCK CAN KILL! To reduce... -
Page 5: Fire Hazards
• Do not wear a cracked or broken helmet • Do not wear gloves or other clothing that contains oil, grease, or other flammable and replace any cracked or broken filter lenses IMMEDIATELY. substances. • Do not wear flammable hair preparations. •... -
Page 6: Fume Hazards
• Make sure welding area has a good, • Do not weld, cut, or heat lead, zinc, cad- mium, mercury, beryllium, or similar met- solid, safe floor, preferably concrete or masonry, not tiled, carpeted, or made of als without seeking professional advice and inspection of the ventilation of the any other flammable material. -
Page 7: Important Safety Instructions
? Be sure your work area is clean and secure. Be sure the area is free from all foreign material, nails, staples, or any other material. ? Always use the appropriate safety gear when operating. Including but not limited to, goggles, dust mask or respirator. MMIG125 MIG / Fluxcore Welder Instructions... - Page 9 Power Cord – This is a standard, grounded KNOW YOUR WELDER 120 volt power cord. (Make sure you are using a properly grounded 120 Vac, 60Hz, single phase, 20 amp power source.) Ground Clamp – Attaching the ground clamp to your work piece “completes” the welding current circuit.
-
Page 10: Welder Installation
WELDER INSTALLATION Select a properly grounded extension cord that will mate directly with the power source receptacle and the welder power cord with- POWER SOURCE CONNECTION out the use of adapters. Make certain that the extension cord is properly wired and in good electrical condition. -
Page 11: Align And Set The Drive Roller
ALIGN AND SET THE DRIVE ROLLER towards the face mask (4), while at the same time pushing upwards (5). Before installing any welding wire into the (Alignment of the second tab is made unit, the proper sized groove must be placed easier by applying pressure to the point into position on the wire drive mechanism. - Page 12 Note: The drive roller has two wire size so will cause burn through (blowing holes) in the metal you are intending to weld. grooves built into it. When installing the drive • If a spool has developed heavy oxidation, roller, the number stamped on the drive roller the only solution to the problem is to dis- for the wire size you are using should be fac- card the spool of wire.
- Page 13 Note: If TOO MUCH tension is applied to the wire spool, the wire will slip on the drive roller or will not be able to feed at all. If TOO LIT- TLE tension is applied, the spool of wire will want to unspool itself.
-
Page 14: Set The Wire Drive Tension
SET THE WIRE DRIVE TENSION heat. There are two voltage heat selec- tions (labeled MIN and MAX) available on this welder. Position MIN provides the WARNING lowest voltage (heat) and position MAX the highest voltage (heat). 16. Set the WIRE SPEED control to the mid- dle of the wire speed range. -
Page 15: Operation
TUNING IN THE WIRE SPEED OPERATION This is one of the most important parts of Operation of this welder consists of selecting MIG welder operation and must be done and adjusting operating controls for optimum before starting each welding job or whenever voltage (welding heat) and wire speed any of the following variables are changed: settings. -
Page 16: Learning To Weld
You can use the wire speed control to slightly tions until you find the one that seems to increase or decrease the heat and penetra- work best for you. Refer to WELDING tion for a given heat setting by selecting POSITIONS - p.17) higher or lower wire speed settings. -
Page 17: Welding Techniques
On a fillet weld joint, the nozzle is generally the weld joint. Moving the torch too fast, too positioned in such a manner so as to split the slow, or erratically will prevent proper fusion angle between the horizontal and vertical or create a lumpy, uneven bead. -
Page 18: Welding Positions
There are two basic types of weld beads, the 2. The HORIZONTAL POSITION (Figure 15) is next in difficulty level. It is performed very stringer bead and the weave bead. much the same as the flat weld except that angle B (see HOLDING THE TORCH - p.15) 1. -
Page 19: Multiple Pass Welding
The illustrations in Figure 18 show the sequence for laying multiple pass beads into WARNING a single V butt joint. NOTE: WHEN USING SELF-SHIELDING FLUX-CORE WIRE it is very important to Hot slag can cause fires and serious injury from burns! Be sure to wear protective cloth- thoroughly chip and brush the slag off each completed weld bead before making another ing, eye, and ear gear when using the... -
Page 20: Spot Welding Instructions
SPECIAL WELDING METHODS allowed to fill up the hole leaving a spot weld that is smooth and flush with the surface of the top piece. SPOT WELDING The purpose of a spot weld is to join pieces Select the wire diameter, heat setting, of metal together with a spot of weld instead and tune in the wire speed as if you were of a continuous weld bead. -
Page 21: Consumable Maintenance
MAINTENANCE Always use a contact tip stamped with the same diameter as the wire it will be used with. GENERAL Note: Due to inherent variances in flux-cored This welder has been engineered to give welding wire, it may be necessary to use a many years of trouble-free service providing contact tip one size larger than your flux core that a few very simple steps are taken to... -
Page 22: Preventive Maintenance
A SHORTED nozzle results when spatter removing four phillips head screws. buildup bridges the insulation in the nozzle, 8. Remove the hanging hook from the two allowing welding current to flow through it as case halves by carefully pulling it apart well as the contact tip. - Page 24 TABLE 5 – TROUBLESHOOTING...
- Page 25 MMIG125 WIRING DIAGRAM...
- Page 26 MMIG125 PARTS LIST No. Part # Description No. Part # Description 1.1.01.02.0070 Left Board 1.1.05.02.0168 Control PCB 2.07.40.357 Wire Feeder 2.05.05.106 PCB Holder 1.2.01.01.0538 Spool Holder 2.07.11.009 Potentiometer Knob 1.1.02.01.0604 Middle Vertical Board 1 1.1.01.03.0209 Front Panel 1.1.01.04.0112 Underpan 2.05.05.201 Cable Holder 1.1.01.03.0207...
- Page 27 1-888-287-6981...