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Jegs MIG100 - User Manual

Jegs MIG100
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Page 1
Installation Instructions for 81540
MIG100 Gasless Welder
PLEASE READ MANUAL CAREFULLY BEFORE USING.
SAFETY INFORMATION
Before using welder, please ensure that you know:
1. Arc welding can be dangerous.
2. This welding machine must be connected to a power source in accordance with appliance electrical codes.
3. For safety turn off and unplug machine when installing new wire spool, adjusting wire tension roller or replacing
contact tip.
4. The contact tip is electrically “hot” and if it contacts the grounded work piece it will cause damage.
5. All installation, maintenance, repair operation of this equipment should be performed by qualified technicians in
accordance with national, state and local codes.
6. Electric shock could kill.
7. Disconnect from power source before assembling, disassembly or maintenance of the torch or contact tip or
changing wire spools.
8. Fumes and welding gases can be dangerous.
9. Welding sparks can cause fire or explosion.
10. Arc rays can burn.
11. Hot metal will burn.
12. Electromagnetic fields may be dangerous.
WARNING!
PLEASE BE REMINDED TO WEAR ALL PROTECTION DEVICES BEFORE WELDING IN A SAFE PLACE.
SPECIFICATION
Process(s)
Flux-Cored MIG
welding
GAS/FLUX
Flux
Input Voltage
110 V AC
Input Current
20 A
Input Frequency
60 Hz
Output Current Range
50-90A
Rated Duty Cycle
20% @90A
Open Circuit Voltage
27V AC
Wire Feed Speed
Infinite adjustable
Current Settings
4 Position
Flux cored welding wire dia.(inch)
0.03’’-0.035’’
Insulation class
F
Protection class
IP21S
1-800-345-4545 jegs.com

Questions and Answers

  • R
    Ryan ChavezJul 27, 2025
    Why does my Jegs Welding System lack weld penetration?
    • W
      William CharlesJul 27, 2025
      Lack of weld penetration in your Jegs Welding System can occur if the welding output is too low, so try increasing it. Also, check if the torch is moved too fast and decrease the torch speed if needed. Finally, ensure that the input voltage is adequate; check and adjust it if it's too low.
  • C
    cavilaAug 2, 2025
    What to do if my Jegs Welding System is burning holes in the work piece?
    • J
      Jacqueline PatrickAug 2, 2025
      If your Jegs Welding System is burning holes, it could be due to the welding output being too high. Reduce the welding output. Also, check if the torch is moving too slowly and increase the torch speed.
  • B
    Brian HopkinsAug 9, 2025
    How to fix a break in the welding circuit of my Jegs Welding System?
    • C
      carterfrancesAug 9, 2025
      A break in the welding circuit of your Jegs Welding System can be caused by several factors. Ensure you're using the correct size of contact tip for the wire; if not, replace it. Inspect the contact tip for damage and replace if necessary. Make sure the contact tip is tightened correctly. Check the feed rollers for wear and replace if needed. Replace the welding wire if it's corroded. Ensure the pressure roller adjustment is correct; adjust the roller if needed. If the pressure roller is sticking, lubricate or replace it.
  • V
    Valerie KleinAug 14, 2025
    What to do if my Jegs Welding System welder does not operate with the trigger pressed?
    • K
      Kelsey StoneAug 15, 2025
      If your Jegs Welding System doesn't operate when the trigger is pressed, check the main supply connection and the supply fuse. Inspect the torch trigger and its connections. If the thermal overload has cut out, allow the welder to cool. As a final step, check the PCB and replace it if it is not correct.
  • J
    Jeffrey SmithAug 20, 2025
    Why is my Jegs Welding System producing an unable arc and excessive spatter?
    • N
      Natalie EspinozaAug 20, 2025
      An unable arc and excessive spatter with your Jegs Welding System can happen if the welding output is too high; in this case, reduce the welding output. Another potential cause is moving the torch too slowly; increase the torch speed to resolve this.

Summary

Safety Information

General Safety Precautions

Key safety points to be aware of before operating the welding machine.

Protective Gear Warning

Mandatory use of all protection devices before welding in a safe place.

Specification

Operation

Connecting the Welder to a Power Source

Instructions for connecting the MIG100 welder to a 120V AC, 60Hz power supply.

Changing the Drive Roller

Step-by-step guide to adjust the drive roller for various wire sizes.

Installing and Threading Wire

Installing the Wire Spool

Procedure for opening the welder door and mounting the 4" wire spool.

Threading Welding Wire

Guide for threading flux-core wire through the drive motor to the welding gun.

Usage and Welding Technique

Basic steps for connecting ground clamp, cleaning area, and positioning the gun.

Troubleshooting

Arc Issues and Spatter

Diagnosing problems like excessive spatter or inability to start an arc.

Weld Penetration Problems

Addressing issues with lack of weld penetration or burning holes in work piece.

Welder Not Operating

Troubleshooting steps when the welder does not power on or respond to trigger.

Break in Welding Circuit

Identifying causes for a break in the welding circuit, like contact tip or wire issues.

Jegs MIG100 Specifications

General IconGeneral
Input Voltage120V
Duty Cycle20% @ 90A
Wire Feed SpeedVariable
Welding TypeMIG
Welding Wire Diameter0.030 in
Wire Feed Speed ControlVariable
Welding CapacityUp to 1/8 inch

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