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GRAND MIG 351
M U L T I
GRAND MIG 501
M U L T I
USER MANUAL
INVERTER Based Welding Machines
S Y N
S Y N
IMPORTANT: Read this OPERATOR MANUAL together
with PRESCRIPTION AND COMPLIANCE MANUAL before
to use this equipment. In case of loss one of two parts
contact immediately your dealer.
Allow the operator to consult this manual.
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Table of Contents
Troubleshooting
Related Manuals for LOKERMANN GRAND MIG 501 MULTI SYN
Summarization of Contents
Installation Warning and Safety Precautions
Area Assessment for Electromagnetic Compatibility
Evaluates potential electromagnetic problems in the surrounding area for safe installation.
Reducing Emissions via Public Supply System
Connects to public supply system and takes precautions to reduce emissions.
Arc Welding Equipment Maintenance
Routine maintenance and proper fastening of covers for safe operation.
Welding Cables Positioning Guidelines
Positioning and keeping welding cables short for safety.
Equipotential Bonding for Safety
Bonding metallic objects in the surrounding area to prevent electric shock.
Workpiece Earthing for Emission Reduction
Connecting the workpiece to earth to reduce emissions and ensure safety.
Screening and Shielding for Interference Alleviation
Using screening and shielding to alleviate interference problems.
Overview of Welding Machine Features
Key Features of the GRAND MIG Series
Lists the key features of the GRAND MIG welding machines.
Detailed Technical Specifications
Provides detailed technical specifications for the GRAND MIG models.
Introduction and Technical Principles
Brief Introduction to MIG Welding Technology
Introduces PWM/IGBT technology, MIG series, and machine features.
Duty Cycle and Overheating Protection
Explains duty cycle definition and how over-heat protection works.
Working Principle of the Welding Machine
Details the internal working principle of the GRAND MIG welding machine.
Volt-Ampere Characteristic Explained
Explains the volt-ampere characteristic graph of the welding machine.
Installation and Operation Guide
Machine Layout Description
Describes the overall layout and components of the welding machine.
Front and Rear Panel Layout Identification
Identifies and explains the controls and connectors on the front and rear panels.
Welding Machine Control Explanations
MMA Hot Start and Arc Force Settings
Explains the function and adjustment of MMA Hot Start and Arc Force.
Down Slope and Cooling Selection Controls
Details Down Slope function and Water/Air Cooling Selection button.
2T/4T Trigger and Mode Control Functions
Explains 2T/4T trigger modes and the Mode Control button.
Parameter Adjustment and Error Indicators
Describes parameter adjustment knob and error indicators like overload.
Wire Feeder Overview and Controls
Wire Feeder Panel Layout Identification
Identifies and explains controls and displays on the wire feeder panels.
Wire Feeder Digital Display Functions
Explains the functions of the Left Hand (LH) and Right Hand (RH) digital displays.
Wire Feeder Mode and Parameter Buttons
Details buttons like Air Check, Cooling Selection, 2T/4T, Parameter Selection.
Wire Feeder Functions and Indicators
Wire Feeder Display Parameter Explanations
Explains the parameters displayed on the LH and RH digital displays.
MIG Wave Control and Inductance Adjustment
Details the MIG Wave Control/Inductance knob and its effect on arc.
Wire Feeder Indicators and Cooling Selection
Explains Spool Gun Indicator, Overload/Error Indicator, and Cooling Selection.
MIG Welding Setup and Parameter Optimization
Gas Flow and Burn Back Setting Adjustments
Explains Gas Post Flow, Soft Start, and Burn Back adjustments.
Parameter Adjustment and Selector Knobs
Describes LH and RH MIG Parameter Adjustment/Selector Knobs.
MIG Voltage and Wire Speed Optimization
Provides guidance on setting MIG voltage and wire speed for optimal results.
Synergic Functionality for Simplified Setup
Explains how the synergic function simplifies MIG welding setup.
MIG Synergic Programs and Stitch Welding
SYN Parameter Reference Chart for MIG Welding
Provides a reference chart for synergic programs based on material, wire, and gas.
Stitch Welding Functionality Explained
Explains the stitch welding setting for tack welding or short runs.
Water Cooling System Connection Layout
Shows the front and rear panel layout related to water cooling connections.
Power Supply and MMA Welding Installation
Power Supply Input Requirements and Connection
Details the requirements and connection for the 400V AC power supply.
MMA Welding Output Cable Connection Guide
Explains how to connect output cables for MMA welding (DCEP/DCEN).
MMA Welding Operation and Troubleshooting
MMA Welding Operation Step-by-Step Guide
Step-by-step guide for operating the MMA welding mode.
Common MMA Welding Problems and Solutions
Common problems and solutions for MMA welding.
TIG Welding Setup and Connections
TIG Welding Installation Procedure
Guides on connecting the torch, gas, and water cooler for TIG welding.
TIG Torch Remote Control Socket Pinout
Details the remote control socket pinout for TIG torch control.
TIG Welding Operation and Arc Ignition
TIG Welding Operation Steps
Step-by-step guide for performing TIG welding operations.
Lift Arc DC TIG Ignition Process
Explains the Lift Arc ignition process for DC TIG welding.
TIG Gun Control Functions Explained
Details the functions of trigger switch, remote amps, and other TIG gun controls.
DC TIG Welding Troubleshooting Guide
DC TIG Welding Problem Diagnosis and Remedies
Common problems and suggested remedies for DC TIG welding.
MIG Welding Setup and Connections
MIG Welding Installation Procedure
Guides on connecting MIG torch, wire feeder, and power source.
MIG Torch Connection Importance and Risks
Emphasizes the importance of secure MIG torch connection to prevent arcing.
MIG Wire Installation and Feed Setup
Wire Installation and Spool Loading Procedure
Step-by-step instructions for installing wire onto the spool and feeding it.
Wire Feed Roller and Tension Adjustment
Details on adjusting drive rollers and wire tension for smooth feed.
MIG Wire Feed Roller Selection Guide
Solid Wire Drive Roller Selection
Describes V-groove rollers for solid wires like steel.
Soft Wire Drive Roller Selection
Describes U-groove rollers for soft wires like aluminum.
Flux Core Wire Drive Roller Selection
Describes knurled rollers for flux core wire, noting potential wear.
MIG Wire Feed Setup and Tensioning
Spool Loading and Wire Feeding Procedure
Instructions for fitting the spool and feeding wire into the feeder.
Drive Roller and Tension Adjustment Guide
Details on adjusting drive rollers and wire tension for smooth feed.
MIG Torch Liners and Spool Gun System
MIG Torch Liner Functionality
Explains the purpose and importance of the MIG gun liner.
Spool Gun System Overview and Advantages
Advantages and applications of using a spool gun.
Spool Gun Setup and Connection Illustration
Illustrates the setup and connections for a spool gun.
Spool Gun Operation and Settings
Spool Gun Installation and Wire Loading Guide
Step-by-step guide for connecting and setting up the spool gun.
Gas Flow and Cooling Mode Settings for Spool Gun
Instructions for gas flow adjustment and air/water setting for the spool gun.
MIG Welding Fundamentals and Techniques
Definition and Methods of MIG Welding
Explains MIG/GMAW/MAG welding and its primary methods.
Principles and Diagrams of MIG Welding
Illustrates the basic MIG welding process with diagrams.
Basic MIG Welding Techniques Overview
Covers gun position, push, perpendicular, and drag techniques.
MIG Welding Technique Details and Angles
Detailed MIG Welding Techniques Explained
Detailed explanation of push, perpendicular, and drag techniques.
Travel, Work Angles, and Stick Out Impact
Explains the importance of angles and stick out for weld quality.
MIG Welding Parameters and Gas Selection
Correct Travel Speed for MIG Welding
Explains travel speed and its effect on weld quality.
Wire Type, Size, and Gas Selection Guidance
Guidance on selecting correct wire types/sizes and shielding gases.
MIG Welding Troubleshooting Guide
Excessive Spatter Issues in MIG Welding
Common reasons and solutions for excessive spatter in MIG welding.
Porosity and Weld Appearance Problems
Causes and remedies for porosity and poor weld appearance.
MIG Wire Feed Troubleshooting and Parameters
No Wire Feed Troubleshooting Steps
Troubleshooting steps when there is no wire feed.
Inconsistent Wire Feed Troubleshooting
Addresses problems with inconsistent or interrupted wire feed.
CO2 Butt Welding Parameter Reference
Provides reference data for CO2 butt welding parameters.
Welding Parameters and Operational Guidelines
CO2 Corner Welding Parameter Reference
Reference data for CO2 corner welding parameters.
Recommended Operation Environment
Specifies the recommended operating environment for the machine.
Important Operation Notices and Safety
Important notes and safety precautions for operating the machine.
Machine Maintenance Schedule and Checks
Daily Maintenance Checks
Checks for knobs, switches, and operational sounds/smells.
Monthly Maintenance Checks
Checks display values, fan operation, and connectors.
Quarterly and Yearly Maintenance Checks
Checks output cables, internal components, and insulation impedance.
General Troubleshooting and Error Diagnosis
Power and Fan Troubleshooting Solutions
Solutions for power light not on or fan not working after overheating.
Output and Wire Feed Troubleshooting
Troubleshooting no output, no gas, or wire feeder issues.
Arc and Control Circuit Troubleshooting
Addresses problems with striking arc, welding stops, or potentiometer issues.
Error Code Reference and Descriptions
Thermal Relay and Machine Operational Errors
Lists error codes for thermal protection, phase loss, no water, no gas, voltage, current.
Switch, Accessory, and Communication Errors
Covers errors related to panel buttons, torch, water cooler, and communication.
Electrical Schematics
Power Supply and Control PCB Schematic
Provides the schematic for the power supply and control board.
Driver and Internal Circuit Schematic
Shows the driver circuit and internal connections schematic.
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