Lincoln POWER MIG 300 User Manual (English)

Questions and Answers:

C
christinenortonSep 7, 2025
Why does wire bird nest while welding with Lincoln POWER MIG 300?
- H
  Hunter MitchellSep 7, 2025
  If wire bird nests while welding with your Lincoln Welding System, ensure the torch liner conduit is fully inserted so that it touches the inner black plastic wire guide. If the inner black plastic wire guide is worn out, replace it. Check that the Push-Pull torch drive rolls aren't set too tight, referring to the owner's manual for the proper setting. If the problem continues, lower your Stall Factor Number.
R
regina13Sep 9, 2025
Why doesn't gas flow when trigger is pulled on Lincoln POWER MIG 300?
- D
  denise79Sep 9, 2025
  If gas does not flow when the gun trigger is pulled on your Lincoln Welding System, first, ensure that the gas supply is properly connected and turned 'on'. If the gas solenoid actuates (clicks) when the trigger is pulled, there may be a restriction in the gas supply line. The gun cable assembly may be faulty, so check or replace it. If the gas solenoid does not operate when the gun trigger is pulled, the problem is within the POWER MIG 300. Also, make sure the gun is pushed all the way into the gun mount and is properly seated.
J
James ScottSep 12, 2025
Why does arc length vary while welding with Lincoln Welding System?
- S
  Shelby CampbellSep 12, 2025
  If the arc length varies while welding (arc length is not constant) with your Lincoln Welding System, the PM 300 drive rolls may be set too tight; the tension arm should be set at 1 to 1-1/2. Check that the spindle brake is not set too tight and that there is an aluminum spacer behind it. Clean or replace the contact tip. If the problem continues, the Stall Factor Number needs to be increased.
E
Elizabeth GarciaSep 12, 2025
Why does wire burn back to the tip during welding on Lincoln Welding System?
- L
  Lisa SandovalSep 12, 2025
  If, during welding, the wire continues to burn back to the tip on your Lincoln Welding System, ensure the spindle brake isn't set too tight and that an aluminum spacer is behind it. Check that the POWER MIG 300 drive rolls aren't too tight; the tension arm should be set to 1 to 1-1/2. For Push-Pull torches, ensure the drive rolls aren't too tight, referring to the owner's manual for the proper setting. If pulse welding, the trim value may be set too high. Clean or replace the contact tip. If the problem continues, the Stall Factor Number needs to be increased.
L
leonjenniferSep 14, 2025
What to do if there is physical damage to Lincoln POWER MIG 300?
- E
  edwardsalexisSep 14, 2025
  If you observe major physical or electrical damage when the sheet metal covers are removed from your Lincoln Welding System, contact your local Lincoln Authorized Field Service Facility.

Lincoln POWER MIG 300 Specifications

General

Brand	Lincoln
Model	POWER MIG 300
Category	Welding System
Language	English

Summary

Safety Depends on You

User Responsibility for Safe Operation

Emphasizes user responsibility for safe operation and installation of the equipment.

Safety Precautions: Engine Powered Equipment

California Proposition 65 Warnings

Warnings regarding chemicals in diesel and engine exhaust known to cause cancer or birth defects.

Engine-Powered Equipment Safety Guidelines

Safety precautions for operating engine-powered equipment, including fuel handling and maintenance.

Electric and Magnetic Field Hazards

Information on potential interference of EMF fields with pacemakers and health effects.

Safety Precautions: Arc and Fume Hazards

Electric Shock Hazards and Prevention

Precautions to prevent electric shock, including insulation, dry gloves, and avoiding wet conditions.

Arc Ray Protection Measures

Protection against arc rays using shields, proper filter lenses, and flame-resistant clothing.

Fumes and Gases Hazards and Mitigation

Guidance on ventilation, avoiding toxic fumes, and precautions when welding near chlorinated vapors.

Safety Precautions: Fire and Cylinder Hazards

Welding Sparks and Fire Prevention

Measures to prevent fires and explosions, including removing hazards and using fire extinguishers.

Compressed Gas Cylinder Safety Guidelines

Safety guidelines for handling compressed gas cylinders, including securing and positioning them.

Electrically Powered Equipment Safety Rules

Electrical safety precautions for installation, grounding, and servicing of equipment.

Post-Purchase Information

Examine Carton and Equipment for Damage

Instructions for checking equipment for damage upon arrival and filing claims.

Product Registration Options

Information on how to register the product online or via fax.

Safety Level Indicators

WARNING Indicator Meaning

Indicates information that must be followed exactly to avoid serious personal injury or loss of life.

CAUTION Indicator Meaning

Indicates information that must be followed to avoid minor personal injury or damage to equipment.

Installation: Technical Specifications

Machine Technical Specifications

Detailed technical specs: input voltage, duty cycle, output ratings, physical dimensions, wire speed.

Input Power Requirements

Information on standard voltage/frequency and input current requirements for single-phase operation.

Rated Output Specifications

Specifications for the machine's output ratings in Amps and Volts at rated amperes.

Recommended Input Wire and Fuse Sizes

Guidance on selecting appropriate wire sizes and fuse/breaker sizes for single-phase input.

Physical Dimensions and Wire Speed

Specifications for the machine's height, width, depth, weight, and wire speed range.

Installation: Setup Procedures

Installation Safety Precautions

General safety warnings related to electric shock, fumes, sparks, and arc rays during installation.

Requirement for Qualified Installers

Mandatory requirement for installation, use, and servicing to be performed by qualified individuals.

Uncrating and Location Guidelines

Instructions for safely removing the welder from packaging and selecting an optimal location.

Input Power, Grounding, and Connection

Guidance on checking power supply adequacy and connecting input power and grounding.

Installation: Input Power Connections

Triple Voltage Input Connections Diagram

Diagram illustrating input connections for 230V, 460V, and 575V single-phase operation.

Receptacle Connection Diagram

Diagram showing how to connect the receptacle to system grounding and hot wires.

Installation: Gun and Gas Setup

Gun and Cable Installation Procedure

Instructions for connecting the welding gun and cable assembly to the welder.

Liner Installation and Trimming Instructions

Detailed steps for installing and trimming the liner for the welding gun.

Shielding Gas Supply Setup

Information on providing shielding gas supply, including cylinder setup and regulator connection.

Installation: Shielding Gas Procedures

Shielding Gas Installation Steps

Steps for connecting the gas regulator and hose, including cracking the cylinder valve.

Operation: Overview and Safety

Operation Safety Precautions

General safety warnings for operating the welding machine, including shock, fumes, sparks, and rays.

Welding Mode Definitions

Explanation of Non-Synergic and Synergic welding modes and their operation.

Common Welding Abbreviations

List of common abbreviations used in welding, such as WFS, CC, CV, GMAW, GTAW, SMAW, FCAW.

Operation: Product and Controls

Product Description and Capabilities

Overview of the POWER MIG 300's capabilities, including multi-process DC welding and duty cycle.

Available Optional Accessories

Availability of optional kits for push-pull welding, spool gun operation, and dual cylinder mounting.

Control Panel and Settings Overview

Detailed description of the machine's controls, including meters, knobs, and switches.

Operation: Control Functions

Volt / Trim Meter Functionality

Function of the meter displaying voltage or trim value, with LED indicators for units.

Output Control Knobs Description

Description of the two encoder knobs used to adjust weld parameters like current and output.

Thermal Status Indicator Explained

Explanation of the thermal status light indicating overload or overheating.

Multi-Process Panel Functions

Panel for selecting weld modes and adjusting parameters like Preflow, Postflow, Run-In, Start, etc.

Operation: Setting Up for Welding

Configuring the Welder for Operation

Procedure for setting up the machine, including checking polarity, selecting weld modes, and adjusting parameters.

Multi-Process Panel Diagram Reference

Illustration of the Multi-Process Panel with weld mode selections and parameter adjustments.

Adjustable Weld Parameter Table Reference

Table showing adjustable weld parameters for different weld modes like CC-STICK, CV-GMAW, etc.

Operation: Weld Process Settings

Weld Mode Selection Process

Selecting weld modes based on application, metal type, shielding gas, and electrode size.

Preflow and Postflow Gas Timing

Settings for pre-flow and post-flow gas times before and after welding for arc protection.

Run-In Speed Adjustment

Function to set independent wire feed speed for starting the arc, avoiding stubbing.

Start Procedure Configuration

Setting up a starting procedure, such as Hot Start or Cold Start, for improved weld initiation.

Operation: Arc Control and Specialized Processes

Arc Control Adjustment Functionality

Adjusting arc force, inductance, or pulsed frequency for different welding processes.

Crater Fill Control Mechanism

Control to fill the weld crater, preventing stresses and cracks, with ramp-down transition.

Burnback Time Setting

Setting the time delay between wire feed stop and arc stop to prevent wire sticking.

Spot Weld Timer Function

Timer for adjusting arc on-time for spot or tack welds, with automatic cycle progression.

Wire Drive Roll Information

Information on drive rolls, their grooves, and matching them to wire size for proper feeding.

Operation: Wire Feeding Procedures

Wire Electrode Feeding Procedure

Procedure for feeding the electrode wire through the gun and cable assembly.

Idle Roll Pressure Setting Guide

How to set the idle roll pressure for optimal wire feeding based on wire type and diameter.

Avoiding Wire Feeding Problems

Tips and procedures for preventing wire feeding issues, including gun handling and cable maintenance.

Operation: Roll and Reel Management

Procedure for Changing Drive and Idle Roll Sets

Step-by-step instructions for replacing drive and idle rolls for different wire sizes.

Wire Reel Loading Procedures

Instructions for mounting Readi-Reels, spools, or coils onto the wire drive spindle.

Operation: Wire Feeding Troubleshooting

Wire Feeding Troubleshooting Steps

Troubleshooting common wire feeding issues like birdnesting or jams.

Idle Roll Pressure Setting Adjustment

Fine-tuning idle roll pressure for optimal wire feeding based on wire characteristics.

Preventing Wire Feeding Problems

Guidelines to prevent wire feeding issues, focusing on cable management and electrode quality.

Operation: Pulse Welding Process

Pulse Welding (GMAW-P) Explained

Explanation of the pulsed-arc process, its benefits, and how arc control affects it.

Operation: Pulse-on-Pulse Process

Pulse-on-Pulse™ (GMAW-PP) Process Details

Description of the Pulse-on-Pulse process for thin aluminum, its benefits, and parameters.

Aluminum Pulse-on-Pulse Welding Procedures

Recommended settings for Pulse-on-Pulse welding of aluminum based on material and wire size.

Operation: Power Mode Process

Power Mode™ Process Explanation

Explanation of the Power Mode process for stable low-setting welding, especially for thin aluminum.

Power Mode Procedure Setup Guidance

Steps for setting wire feed speed and Volts/Trim for Power Mode welding.

Power Mode Welding Procedures Table

Recommended settings for Power Mode welding of steel, stainless steel, and aluminum.

Accessories

Drive Roll Kits Availability

Available drive roll kits for various wire sizes and types, with standard items listed.

Aluminum Feeding Kit (K2153-1)

Kit to facilitate push feeding of aluminum wire using the standard feeder and gun.

Readi-Reel Adapter (K363P)

Adapter for mounting 22-30 lb. Readi-Reels onto the 2" spindle.

Dual Cylinder Mounting Kit (K1702-1)

Kit for stable side-by-side mounting of two full-size gas cylinders.

Alternative Magnum GMAW Gun and Cable Assemblies

Description of separately available gun and cable assemblies for the POWER MIG 300.

Magnum Gun Connection Kit (Optional K466-6)

Kit enabling use of standard Magnum 200, 300, or 400 gun and cable assemblies.

Spool Gun (Prince™ XL) Operation

Information on using the Prince XL spool gun with the POWER MIG 300.

Weld Procedure with Prince XL or Cobra Gold Torch

Procedure for making welds using the Prince XL or Cobra Gold torch.

Maintenance: Safety and General Care

Maintenance Safety Precautions

Safety warnings for performing maintenance, including electrical hazards and power disconnection.

General Machine Cleaning

Routine cleaning to prevent dirt buildup, especially in dusty environments.

Drive Rolls and Guide Plates Care

Inspection and cleaning of drive rolls and guide plates, and when to change them.

Contact Tip and Gas Nozzle Installation

Instructions for installing correct contact tips and gas nozzles for different welding processes.

Gun Tubes and Nozzles Maintenance

Replacing worn contact tips and cleaning spatter from gun tubes and nozzles.

Gun Cable Liner Cleaning

Procedure for cleaning the cable liner to prevent wire feeding problems.

Maintenance: Liner Procedures

Liner Removal and Replacement Instructions

Instructions for removing, installing, and trimming the gun cable liner.

Troubleshooting: Guide Overview

Troubleshooting Guide Structure

Explanation of the three-step troubleshooting procedure: locate problem, find cause, and recommended action.

Troubleshooting: Machine Issues

Physical Damage and Fuse Problems

Addressing physical damage, tripping breakers, or blowing fuses.

Power Up and Output Troubleshooting

Troubleshooting when the machine does not power up or fails to produce output.

Thermal Indicator Troubleshooting

Checking fan operation and air passages when the thermal symbol is lit.

Troubleshooting: Output and Arc Issues

Output Problems Diagnosis

Addressing issues like voltage/wire feed present without trigger, or low output welds.

Arc Striking and Blasting Diagnosis

Troubleshooting poor arc striking, electrode sticking, or blasting off.

Troubleshooting: Wire Feeding Issues

Rough Wire Feeding Resolution

Resolving rough wire feeding issues when drive rolls are turning but wire is not feeding.

Wire Feed Stoppage During Welding

Diagnosing wire feed stoppage that resumes after trigger release and re-pull.

Troubleshooting: Gas Flow Problems

Gas Flow Troubleshooting

Addressing issues where gas does not flow when the gun trigger is pulled.

Troubleshooting: Fault Codes and Displays

Understanding Fault Codes

Understanding and resolving fault codes related to primary overcurrent, CPU, or motor overloads.

Interpreting Display Indicators

Interpreting machine status indicators like scrolling dashes, Err messages, and steady/blinking displays.

Troubleshooting: Push Pull Wire Feeding (Loading)

Push Pull Wire Loading Issues

Resolving wire birdnesting or drive roll stopping during push-pull wire loading.

Troubleshooting: Push Pull Wire Feeding (Arc)

Push Pull Arc Length and Birdnesting

Addressing wire birdnesting and inconsistent arc length during push-pull welding.

Troubleshooting: Push Pull Wire Feeding (Burnback)

Push Pull Burnback and Birdnesting Resolution

Resolving wire burnback to the tip and wire birdnesting during push-pull operation.

Troubleshooting: Push Pull Stall Factor

Push Pull Stall Factor Adjustment Procedure

Procedure for adjusting the Stall Factor Number for push-pull wire feeding.

Wiring Diagrams

Wiring Diagram for Code 10562

Schematic of the internal wiring for POWER MIG 300, Code 10562.

Wiring Diagrams

Wiring Diagram for Code 10952

Schematic of the internal wiring for POWER MIG 300, Code 10952.

Wiring Diagrams

Wiring Diagram for Codes 10958 and 11000

Schematic of the internal wiring for POWER MIG 300, Codes 10958 and 11000.

Wiring Diagrams

Wiring Diagram for Codes 11097, 11098

Schematic of the internal wiring for POWER MIG 300, Codes 11097 and 11098.

Dimension Print

Machine Physical Dimensions

Visual representation of the POWER MIG 300 with key physical dimensions indicated.

Multilingual Safety Warnings

Spanish Safety Precautions Summary

Spanish safety warnings covering electrical, flammable, and eye protection.

French Safety Precautions Summary

French safety warnings covering electrical, flammable, and eye protection.

German Safety Precautions Summary

German safety warnings covering electrical, flammable, and eye protection.

Portuguese Safety Precautions Summary

Portuguese safety warnings covering electrical, flammable, and eye protection.

Japanese Safety Precautions Summary

Japanese safety warnings covering electrical, flammable, and eye protection.

Chinese Safety Precautions Summary

Chinese safety warnings covering electrical, flammable, and eye protection.

Korean Safety Precautions Summary

Korean safety warnings covering electrical, flammable, and eye protection.

Arabic Safety Precautions Summary

Arabic safety warnings covering electrical, flammable, and eye protection.

General Safety Instruction Statement

Read and understand manufacturer's instructions and employer's safety practices.

Multilingual Safety Precautions: Operational

Fume Removal Safety Precautions

Keep head out of fumes, use ventilation or exhaust to remove fumes from breathing zone.

Servicing and Panel Operation Safety

Turn power off before servicing and do not operate with panel open or guards off.

Spanish Operational Safety

Spanish safety precautions for fume removal, servicing, and panel operation.

French Operational Safety

French safety precautions for fume removal, servicing, and panel operation.

German Operational Safety

German safety precautions for fume removal, servicing, and panel operation.

Portuguese Operational Safety

Portuguese safety precautions for fume removal, servicing, and panel operation.

Japanese Operational Safety

Japanese safety precautions for fume removal, servicing, and panel operation.

Chinese Operational Safety

Chinese safety precautions for fume removal, servicing, and panel operation.

Korean Operational Safety

Korean safety precautions for fume removal, servicing, and panel operation.

Arabic Operational Safety

Arabic safety precautions for fume removal, servicing, and panel operation.

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Lincoln POWER MIG 300 User Manual

Table of Contents

Questions and Answers:

Lincoln POWER MIG 300 Specifications

Summary

Safety Depends on You

User Responsibility for Safe Operation

Safety Precautions: Engine Powered Equipment

California Proposition 65 Warnings

Engine-Powered Equipment Safety Guidelines

Electric and Magnetic Field Hazards

Safety Precautions: Arc and Fume Hazards

Electric Shock Hazards and Prevention

Arc Ray Protection Measures

Fumes and Gases Hazards and Mitigation

Safety Precautions: Fire and Cylinder Hazards

Welding Sparks and Fire Prevention

Compressed Gas Cylinder Safety Guidelines

Electrically Powered Equipment Safety Rules

Post-Purchase Information

Examine Carton and Equipment for Damage

Product Registration Options

Safety Level Indicators

WARNING Indicator Meaning

CAUTION Indicator Meaning

Installation: Technical Specifications

Machine Technical Specifications

Input Power Requirements

Rated Output Specifications

Recommended Input Wire and Fuse Sizes

Physical Dimensions and Wire Speed

Installation: Setup Procedures

Installation Safety Precautions

Requirement for Qualified Installers

Uncrating and Location Guidelines

Input Power, Grounding, and Connection

Installation: Input Power Connections

Triple Voltage Input Connections Diagram

Receptacle Connection Diagram

Installation: Gun and Gas Setup

Gun and Cable Installation Procedure

Liner Installation and Trimming Instructions

Shielding Gas Supply Setup

Installation: Shielding Gas Procedures

Shielding Gas Installation Steps

Operation: Overview and Safety

Operation Safety Precautions

Welding Mode Definitions

Common Welding Abbreviations

Operation: Product and Controls

Product Description and Capabilities

Available Optional Accessories

Control Panel and Settings Overview

Operation: Control Functions

Volt / Trim Meter Functionality

Output Control Knobs Description

Thermal Status Indicator Explained

Multi-Process Panel Functions

Operation: Setting Up for Welding

Configuring the Welder for Operation

Multi-Process Panel Diagram Reference

Adjustable Weld Parameter Table Reference

Operation: Weld Process Settings

Weld Mode Selection Process

Preflow and Postflow Gas Timing

Run-In Speed Adjustment

Start Procedure Configuration

Operation: Arc Control and Specialized Processes

Arc Control Adjustment Functionality

Crater Fill Control Mechanism

Burnback Time Setting

Spot Weld Timer Function

Wire Drive Roll Information

Operation: Wire Feeding Procedures

Wire Electrode Feeding Procedure

Idle Roll Pressure Setting Guide

Avoiding Wire Feeding Problems

Operation: Roll and Reel Management

Procedure for Changing Drive and Idle Roll Sets

Wire Reel Loading Procedures