Miller MigMatic 380 User Manual

72 pages

To Next Page

To Next Page

Page #1 background image

Loading...

Page #1 background image

OWNER’S MANUAL

Processes

Description

MIG (GMAW) Welding

Flux Cored (FCAW) Welding

Arc Welding Power Source

Wire Feeder

OM-251958F 2018-02

MigMatic 300/380 And DX

R

CE

File: MIG (GMAW)

For product information,

Owner’s Manual translations,

and more, visit

www.MillerWelds.com

Table of Contents

Questions and Answers:

D
Daniel DiazAug 9, 2025
How to fix low, high, or erratic wire speed on Miller MigMatic 380?
- K
  Kimberly FlynnAug 10, 2025
  To address inconsistent wire speed issues on your Miller Welding System, try the following: * Readjust the front panel settings. * Ensure you're using the correct size drive rolls. * Readjust the drive roll pressure. * Replace the inlet guide, contact tip, or liner if needed. * Check the position of the input jumper links. * Reset circuit breaker CB1. * Rotate the Wire Speed control to a higher setting. If the problem continues, it is recommended to have a Factory Authorized Service Agent check the Wire Speed control, diodes in main rectifier, and main control board.
C
Caitlin BernardAug 16, 2025
What to do if Miller Welding System has no weld output and wire doesn't feed?
- J
  Juan FoleyAug 16, 2025
  If your Miller Welding System isn't producing any weld output and the wire isn't feeding, there are several things you can check: * Ensure the line disconnect switch is On. * Replace the building line fuse or reset the circuit breaker if it's open. * Make sure the gun trigger connections are secure. * Check the continuity of the power switch and replace it if necessary. If these steps don't resolve the issue, it is recommended to have a Factory Authorized Service Agent check the main transformer, thermostats, and main control board.
L
Lindsey GibsonAug 25, 2025
Why is the weld output low on my Miller MigMatic 380?
- A
  alvarezvictoriaAug 26, 2025
  If you're experiencing low weld output on your Miller Welding System, consider the following: * Ensure the unit is connected to the correct input voltage, and check for low line voltage. * Verify the input voltage jumper links are in the correct position. If the problem persists, it is recommended to have a Factory Authorized Service Agent check the main rectifier and voltage switches. Also, adjust the input line voltage.
T
Thomas WatsonAug 31, 2025
What to do if Miller MigMatic 380 Welding System has no weld output but wire feeds?
- D
  dgambleAug 31, 2025
  If your Miller Welding System is feeding wire but not producing a weld, try these solutions: * Ensure the work clamp is connected to establish good metal-to-metal contact. * Replace the contact tip. Also, the overload condition might have occurred. If the issue persists, it is recommended to have a Factory Authorized Service Agent check the diodes in the main rectifier, the stabilizer, the main transformer, and the voltage switches.

Miller MigMatic 380 Specifications

General

Brand	Miller
Model	MigMatic 380
Category	Welding System
Language	English

Summary

MigMatic 300/380 And DX CE OWNER'S MANUAL

SECTION 1 - SAFETY PRECAUTIONS

1-2. Arc Welding Hazards

Details hazards associated with arc welding processes and safety measures.

SECTION 3 – SPECIFICATIONS

3-2. Specifications

3-3. Duty Cycle And Overheating

Explains duty cycle and precautions against overheating the equipment.

SECTION 4 – INSTALLATION

4-1. Installing Gas Supply

Provides instructions and diagrams for connecting the gas supply cylinder and regulator.

4-2. Installing Wire Spool And Adjusting Hub Tension

Guides on how to install wire spools and set up hub tension.

4-3. Positioning Jumper Links (230/400V 3-Phase Models)

4-4. Electrical Service Guide

Provides recommendations for electrical service requirements and circuit protection.

4-5. Connecting 3-Phase Input Power

Details the procedure for safely connecting the 3-phase input power to the unit.

4-6. Changing Drive Rolls and Wire Inlet Guide

4-7. Aligning Drive Rolls and Wire Guide

4-8. Threading Welding Wire And Adjusting Pressure Roll Tension

Guides on threading welding wire and setting pressure roll tension.

SECTION 5 – OPERATION

Controls Overview

Parameter Selection and Settings

DX Model Operation Modes

Advanced DX Model Settings

SECTION 6 – MAINTENANCE & TROUBLESHOOTING

6-1. Routine Maintenance

6-4. Troubleshooting

Provides a guide to diagnose and resolve common operational problems with the unit.

SECTION 7 – ELECTRICAL DIAGRAMS

SECTION 8 – PARTS LIST

Related product manuals

Preview: Miller MigMatic 300

Miller MigMatic 300

Preview: Miller MigMatic 220

Miller MigMatic 220

Preview: Miller Migmatic 175

Miller Migmatic 175

Miller MIGMATIC 250

Preview: Miller MigMatic S400i

Miller MigMatic S400i

Miller MigMatic S400iP

Preview: Miller MILLERMATIC 135

Miller MILLERMATIC 135

Preview: Miller Millermatic 251

Miller Millermatic 251

Preview: Miller Millermatic 252

Miller Millermatic 252

Preview: Miller Millermatic 300

Miller Millermatic 300

Preview: Miller Millermatic 211

Miller Millermatic 211

Preview: Miller Millermatic 250X

Miller Millermatic 250X