Longevity MigWeld 100 User manual

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Operating Manual
For
MIGWELD™ 100
100AMP MIG Welder 120v

MigWeld™ 100 - 100AMP MIG Welder 120v
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Specifications
Rated AC Output Amps Duty Cycle Volts
Max setting 80 20% 22.5Max OCV
30V Min setting 60 20% 20.5
Rated AC Input 120VAC, 60Hz,18Amps(For use on a 20Amps branch circuit)
Ground Cable 6AWG, single insulation, 6 foot
Torch Power cable 6AWG, single insulation, 6 foot
Power Cord 3-core, double insulated, 14AWG
Thermal Overload Both settings: 6min.shutdown, 10min.back on with light
Welder Tip 0.030” and 0.040”
Wire Size 0.030” –0.040” flux core wire
Wire Spool Size 4”diameter
Overall Dimensions 37×21×31cm
Weight 15.6kgs
Accessories 0.040” welder tip, Welding Face Shield,
Wire Brush/ Hammer Combination
Save This Manual
You will need the manual for the safety warnings and precautions, assembly instructions, operating
and maintenance procedures, parts list and diagram. Keep your invoice with this manual. Write the invoice
number on the inside of the front cover. Keep the manual and invoice in a safe and dry place for future
reference.
Safety Warnings and Precautions
WARNING: When using tool, basic safety precautions should always be followed to
reduce the risk of personal injury and damage to equipment.
Read all instructions before using this tool！
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use machines or power tools in damp or wet locations. Don’t
expose to rain. Keep work area well-lighted .Do not use electrically powered tools in the presence of
flammable gases or liquids.
3. Keep children away. Children must never be allowed in the work area. Don not let them handle
machines, tools or extension cords.
4. Store idle equipment. When not in use, tools must be stored in a dry location to inhibit rust. Always
lock up tools and keep out of reach of children.
5. Do not force tool. It will do the job better and more safely at the rate for which it was intended. Do not
use inappropriate attachments in an attempt to exceed the tool capacity.
6. Use the right tool for the job. Do not attempt to force a small tool or attachment to do the work of a
larger industrial tool. There are certain applications for which this tool was designed. Do not modify
this tool and do not use this tool for a purpose for which it was not intended.
7. Dress properly. Do not wear loose clothing or jewelry as they can be caught in moving parts. Protective,

MigWeld™ 100 - 100AMP MIG Welder 120v
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electrically non-conductive clothes and non-skid footwear are recommended when working. Wear
restrictive hair covering to contain long hair.
8. Use eye and ear protection. Always wear arc shaded, impact safety face shield. Always use the full-face
shield (provided) when arc welding. Wear dust mask or respirator when working around metal,
chemical dusts, fumes and mists.
9. Do not overreach. Keep proper footing and balance at all times. Do not reach over or across running
machines.
10. Maintain tools with care. Keep tools sharp and clean for better and safer performance. Follow
instructions for lubricating and changing accessories. Inspect tool cords periodically and, if damaged,
have them repaired by a authorized technician. The handles must be kept clean, dry, and free from oil
and grease at all times.
11. Disconnect power. Unplug tool when not in use.
12. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are removed from the
tool or machine work surface before plugging it in.
13. Avoid unintentional starting. Be sure the switch is in the OFF positions when not in use and before
plugging in .Do not carry any tool with your finger on the trigger, whether it is plugged in or not.
14. Stay alert. Watch what you are doing m use common sense. Do not operate any tool when you are tired.
15. Check for damaged parts. Before using any tool, any part that appears damaged should be carefully
checked to determine that it would operate properly and perform its intended function. Check for
alignment and binding of moving parts; any broken parts or mounting fixtures; and any other condition
that may affect proper operation. Any part that is damaged should be properly repaired or replaced by a
qualified technician. Do not use the tool if any switch does not turn ON and OFF properly.
16. Guard against electric shock. Prevent body contact with grounded surfaces such as pipes, radiators,
ranges, and refrigerator enclosures.
17. Do not operate tool if under the influence of alcohol or drugs. Read warning labels on prescriptions to
determine if your judgment or reflexes are impaired while taking drugs. If there is any doubt, do not
operate the tool.
18. Maintenance. For your safety, a qualified technician should preform service and maintenance regularly.
19. Use proper size and type extension cord. If an extension cord is required, it must be of the proper size
and type to supply the correct current to the tool without hearting up. Otherwise, the extension cord
could melt and catch fire, or cause electrical damage to the tool. This tool requires use of an extension
cord of 20amps minimum capability (up to 30 feet), with wire size rated at 12AWG. Longer extension
cords require larger size wire. If you are using the tool outdoors, use an extension cord rated for
outdoor use.
Note: Performance of this tool may vary depending on variations in local line voltage. Extension cord
usage may also affect tool performance.
Warning: The warnings, cautions, and instructions discussed in this instruction manual
cannot cover all possible conditions and situations that may occur. It must be understood
by the operator that common sense and caution are factors, which cannot be built into
this product, but must be supplied by the operator.

MigWeld™ 100 - 100AMP MIG Welder 120v
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Arc Welding Safety Warning and Precautions
Warning: This product, when used for welding and similar applications, produces
chemicals known to the State of California to cause cancer and birth defects (or other
reproductive harm).
1. Avoid electrical shock. Do not permit electrically live parts, cables, or electrodes to contact skin,
clothing, or gloves. Protective clothing should be hole-free, dry.
This unit draws enough current to cause serious injury or death. Before turning the welder on , check
the electrode holder to be sure that there are no protruding screw heads, and that all insulation is secure.
Do not weld unless you are insulated from ground and the work piece.
2. Avoid breathing fumes or gases. They can cause serous health problems. Use and active ventilation
system directly above the welding area. Keep your head out of the fumes.
3. Avoid eye and body damage. Arc rays and infrared radiation can injure eyes and burn skin. Wear eye
and body protection. Do not allow viewing by visitors without proper eye and body protection. Use the
provided Face Shield with arc shaded filter plate.
4. Know proper arc welding practices. Read and understand the manufacturer’s instructions, as well as
your employer’s safety practices for arc welding.
5. Connect only to a code approved power source. Connect only to a grounding power source conforming
to the National Electrical Code and Local Codes.
6. Avoid fire and explosion. Remove flammable and explosive material from at least 35 feet from the
welding arc to prevent welding sparks or molten metal form starting a fire. Keep a type ABC fire
extinguisher within easy reach. Thoroughly clean the object being welded of any paint, grease, or other
foreign material.
7. Avoid being burned.Always wear welding gear: leather gloves, leather apron, and shoes.

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Unpacking
When unpacking, check to make sure the following parts are included.
Assembly
1. Attach the handle (30) to the cover (31) using screw (29) insert from the handle top-rear. Refer to the
photo at the top of page 6, and the Assembly Drawing on page11.
2. Attach the cover Locking Spring (8) to the front of the Base Frame (14) using the supplied self-tapping
screw.
MIGWELD 100 Welder
Power Cord (32)
Ground Cable (33)
Torch (1)
Face Shield (38)
Cover Locking Spring (8)
Wire Reel (27)
Wire Brush/Hammer (39)
Cover (31)

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Operation
The MIGWELD100 Welder is used to welding sheet metal and light carbon steel.
Caution: Before arc welding read and understands all safety precautions and warnings
listed.
1. Securely clamp the Ground Cable Clamp (33) as close as possible to the metal object to be welded, or
to the metal workbench where the object is mounted and electrically connected.
2. Set the switch on the control panel as appropriate.
3. Verify that the Power Switch is in the OFF position, then plug the MIGWELD100 Welder plug into a
dedicated, 110VAC, 20amp line with delayed action type circuit breaker or fuses.
4. While holding the Torch Cable Clamp with electrode wire clearly out of the way of any grounded
objects, turn the Power Switch to the ON position.
5. Momentarily press the Torch switch to test the wire feed speed.
Adjust the speed by turning the Wire Feed Speed Knob (16).
6. Orient yourself on the area to be welded, and then place the Face Shield over your eyes.
Warning: Never look at the ignited arc without arc shaded, eye protection in a full-face
shield. Permanent eye damage or blindness can occur. Skin burns can occur. Never
breath arc fumes.
7. Press (and hold) the Torch button and stroke the area to welded with the electrode wire to ignite the arc.
Never tap the electrode wire into the welding surface to ignite the arc. This damages its external
coating on the electrode, which prevents oxygen in the air from coming into contact with the molten
metal, causing it to oxidize.
8. Once the arc is ignited, tilt the electrode wire forward at an angle of approximately 35 angle .The wire
feeds automatically at a speed dependent on the Current setting.
Overload Indicator Light (22)
Switch (7) Power ON/OFF
Power Cord (32)
Ground Cable (33)
Wire Feed Speed Knob (16)
Torch (1) Cable
Switch (7) Current Min./Max

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Note: If too much current is drawn from the MIG Welder, the Thermal Overload protector will activate,
the amber indicator will light, and the Arc Welder will turn off until it cools down. If this happens, turn the
Power Switch to the OFF position and wait about 3-5minutes.
9. When the weld is complete, lift the electrode wire clearly away from any grounded object, set the Face
Shield down and turn toward the MIGWELD100 Welder and turn the Power Switch to the OFF
position.
10. Unplug the Power Cord from the electrical outlet.
Maintenance
Caution: Before performing any maintenance on the MIG welder, unplug the Power
Cord from the electrical outlet.
1. Periodically remove the Right and Left side panels (12 and 13), and using compressed Air, blow out all
dust from the interior.
2. Store in a clean and dry location.
Replacing the Wire Reel
1. Press on the Cover Locking Spring (8), and then lift the Cover (31) using Handle (30) to expose the
Wire Feed Unit (23).
2. Unscrew the Wing Nut (25) and remove the Reel Locking Knob. (26)
3. Remove the empty Wire Reel. (27)
4. Place the new Wire Reel over the shaft and pressed by the Reel Spring (24).
The wire on the reel should unwind counterclockwise (see photo above).
5. Replace the Reel Locking Knob and the Wing Nut. Tighten well.
6. Lift the Wire Feed Adjusting Spring (36) to remove tension.
7. Guide at least 12 inches of wire into the Torch Sheath. If the end of the wire is crimped or bent, cut it
off.
8. Replace tension to the Wire Feed Adjusting Spring (36).
9. Turn the Torch Handle Nozzle Counterclockwise and pull to remove.
10. Turn the Contact Tip counterclockwise and remove.
11. Lay the Torch Sheath out in a straight line so that the wire moves through it easily.
Warning: The following steps require applying power to the welder. Do not touch
Wire Sheath
Tension Adjusting Screw (37)
Handle (30)
Cover (31)
Wire Feed Adjusting Spring (36)

MigWeld™ 100 - 100AMP MIG Welder 120v
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anything with the Torch Handle or an arc may be ignited.
12. Plug the Power Cord into its electrical outlet, presses the Current Switch to appropriate current and turn
the welder ON.
13. Lift the Torch Handle and continue pressing the Trigger until the wire feeds through two inches.
If the wire does not fed, view the Wire Feed Unit and see if the wire is being pushed.
If it is not, turn the welder OFF and add more tension to the Wire Feed Adjusting Spring (36).
14. Turn the welder ON again and press the Trigger.
15. Once the wire is exposed, turn the welder OFF.
16. Slide the Contact Tip over the wire and screw it into Torch Handle.
17. Replace the Nozzle and cut off any excess wire over two inches.
18. Secure the Cover.
NOTE: Duty Cycle: is a welding equipment specification, which defines the number of minutes , within a
10-minute period, during which a given welder can safely produce a particular welding current .
MIGWELD 100 Welder Parts List
Item# Description Qty. Item# Description Qty.
1 Torch 21 Middle Partition Board
2 Contact Tip 22 Overload Indicator Lamp
3 Nozzle 23 Wire Feed Unit
4 Liner 24 Reel Spring
5 Fixing Pole (A) for Gun Body 25 Wing Nut, M6
6 Fixing Pole (B) for Gun Body 26 Reel Locking Knob
7 Switch 27 Wire Reel
8 Cover Locking Spring 28 Reel Holder
9 Knob Cover 29 Self-tapping Screw, ST4.2×25
10 Nut 30 Handle
11 Speed Control Circuit Board 31 Cover
12 Right Side Panel 32 Power Cord
13 Left Side Panel 33 Ground Cable
14 Base Frame 34 Wire Feed Roller
15 Foot 35 Wire Feed Bearing
16 Wire Speed Knob 36 Wire Feed Adjusting Spring
17 Self-tapping screw.ST4.2*13 37 Adjustment Screw
18 Transformer Carriage 38 Face Shield
19 Thermostat 39 Wire Brush/ Hammer
20 Transformer

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Assembly Drawings
Note: Some parts are listed and shown for
illustration purposes only and are not available
individually as replacement parts.