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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 351 MULTI SYN
Summary of Contents for LOKERMANN GRAND MIG 351 MULTI SYN
- Page 1 USER MANUAL INVERTER Based Welding Machines GRAND MIG 351 M U L T I S Y N GRAND MIG 501 M U L T I S Y N IMPORTANT: Read this OPERATOR MANUAL together with PRESCRIPTION AND COMPLIANCE MANUAL before to use this equipment.
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Page 2: Table Of Contents
CONTENT 1 INSTALLATION WARNING 2 OVERVIEW 2.1 Features 2.2 Technical Data 2.3 Brief Introduction 2.4 Duty cycle and Over-heat 2.5 Working Principle 2.6 Volt-Ampere Characteristic 3 INSTALLATION & OPERATION 3.1 Machine Layout Description 3.1.1 Front and rear panel layout of welding machine 3.1.2 Front and rear panel layout of wire feeder 3.1.3 Front and rear panel layout of water cooling 3.2 Power supply input Connection... -
Page 3: Installation Warning
INSTALLATION WARNING This machine is certified according to 60974-10:2014 Arc Welding Equipment Part 10: Electromagnetic compatibility (EMC) requirement and the EUT belongs to Group 2 Class A. WARNING: This Class A equipment is intended for industrial use and it is not intended for use in residential locations where the elctrical power is provided by the public low-voltage supply system. -
Page 4: Overview
Overview Features New PWM technology and IGBT inverter technology. Intelligent digital wire feeder with all MIG controls and display located on wire feeder control panel MMA function (Stick electrode) VRD (Voltage Reduction Device) Hot start (improves electrode starting) Adjustable Arc Force DC TIG Lift Arc ignition (prevents tungsten sticking during arc ignition) 2T /4T Trigger Control... -
Page 5: Brief Introduction
4. IGBT technology, low power consumption; 5. Rated Duty Cycle ： GRAND MIG 351 MULTI SYN = 350A @ 60%(40°C) GRAND MIG 501 MULTI SYN = 500A @ 60%(40°C) GRAND MIG is suitable for all positions welding for various plates made of stainless steel, carbon steel, alloyed steel etc. -
Page 6: Working Principle
Working Principle The working principle of GRAND MIG is shown as the following figure. Three-phase 380V work frequency AC is rectified into DC （530V） , then is converted to medium frequency AC (about 20KHz) by inverter device (IGBT), after reducing voltage by medium transformer (the main transformer) and rectifying by medium frequency rectifier (fast recovery diodes), and is outputted by inductance filtering. -
Page 7: Installation & Operation
Installation & Operation 1. Negative (-) Welding Power Output Connection Socket 2. Remote Connection Plug 3. Tig Torch Gas Connect Machine 4. Negative (+) Welding Power Output Connection Socket 5. Input power cable Layout 6. Water Cooler Interface Connection Description 7. - Page 8 Further Controls Explained Power Source Display Meter (11) Displays value for parameter adjusted by control knob (27). During welding, displays welding current or voltage depending on welding mode. MMA Hot Start (12) MMA mode only, provides extra power when the weld starts to counteract the high resistance of the electrode and workpiece as the arc is started.
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Page 9: Front And Rear Panel Layout Of Wire Feeder
3.1.2 Front and rear panel 1. Euro Mig Torch/Spool Gun Connector 2. Spool Gun Power Supply Connection (9 Pin Remote Socket) layout of 3. Torch Water Cooling Outlet Connection (blue) wire feeder 4. Torch Water Cooling Return Connection (red) 5. Interconnect Cable Gas Inlet Connection 6. - Page 10 Further Controls Explained Wire Feeder LH Digital Display (10) Before welding, displays synergic program number (Pr), welding voltage (V), crater voltage or stitch weld time (S), depending on the parameter being adjusted. During welding, displays welding voltage. The parameter displayed is indicated by the LED below the display and can be changed pushing knob Using Pr1 is possible to weld in manual mode (without any synergy).
- Page 11 Gas Post Flow Controls the period of time the shielding gas continues to flow for after the arc is stopped. This protects the weld area from contamination while it is still hot enough to react with atmospheric gases, after the weld is finished Soft Start When a weld is started, the workpiece and the wire will be 'cold' compared to welding temperature, this...
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Page 12: Front And Rear Panel Layout Of Water Cooling
The synergic programs are given a number from 1-24, this is accessed on the LH display (10) using the LH knob (21), indicator 'Pr'. To select the relevant program for the welding application, check the chart printed on the inside door of the wire feeder or further on in this manual. 501F 351F Stitch Welding... -
Page 13: Power Supply Input Connection
Power supply input GRAND MIG is designed to operate on a 400V AC power supply. When the power supply voltage is over the safe work voltage, there are over voltage and under Connection voltage protection inside the welder, the alarm light will on, at the same time, the current output will be cut off. -
Page 14: Operation For Mma Welding
3.3.2 Operation (1) According to the above method to install is correct, turn the power switch, so that the power for MMA switch is “ON” position, then the power indicator light, the fan comes on, the device work properly. Welding (2) Select MMA or MMA VRD using the process select button (26). -
Page 15: Installation & Operation For Tig Welding
Installation Switch the ON/OFF Switch (located on the rear panel) to OFF. & Connect the earth lead to “+”, tighten clockwise; Connect the earth clamp to the work piece. Operation Contact with the work piece must be firm contact with clean, bare metal, with no corrosion, paint or scale at the contact point. -
Page 16: Operation For Tig Welding
According to the above method to install is correct, turn the power switch to the “ON” position, 3.4.2 the power LED light should illuminate, the fan comes on, the device work properly. Operation Carefully open the valve of the gas cylinder, set the required gas flow rate. Set the welding mode to ‘Lift TIG’... -
Page 17: Dc Tig Welding Trouble Shooting
3.4.4 3.4.6 The following chart addresses some of the common problems of DC TIG welding. In all cases of DC TIG TIG Welding equipment malfunction, the manufacturer’s recommendations should be strictly adhered to and followed. trouble welding shooting trouble Trouble Possible Reason Suggested Remedy Use pure Argon. -
Page 18: Installation & Operation For Mig Welding
Installation & Operation for MIG Welding 3.5.1 Set up installation for MIG Welding Connect the earth cable quick connector to the negative welding power output socket. Connect the earth clamp to the work piece. Contact with the work piece must be firm contact with clean, bare metal, with no corrosion, paint or scale at the contact point. - Page 19 (11) Check spool gun switch is in the 'off' position. (12) Place the Wire Spool onto the Spool Holder. Snip the wire from the spool being sure to hold the wire to prevent rapid uncoiling. Feed the wire into the wire feeder inlet guide tube through to the drive roller.
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Page 20: Wire Feed Roller Selection
3.5.2 Wire Feed Roller Selection The importance of smooth consistent wire feeding during MIG welding cannot be emphasized enough. Simply put the smoother the wire feed then the better the welding will be. Feed rollers or drive rollers are used to feed the wire mechanically along the length of the welding gun. Feed rollers are designed to be used for certain types of welding wire and they have different types of grooves machined in them to accommodate the different types of wire. -
Page 21: Wire Installation And Set Up Guide
3.5.3 Wire Installation Again the importance of smooth consistent wire feeding during MIG welding cannot be emphasized enough. The correct installation of the wire spool and the wire into the wire feed unit is critical to and Set Up achieving an even and consistent wire feed. A high percentage of faults with mig welders emanate from poor set up of the wire into the wire feeder. -
Page 22: Mig Torch Liner Types And Information
3.5.4 MIG Torch Liner Types MIG Torch Liners The liner is both one of the simplest and most important components of a MIG gun. Its sole purpose Information is to guide the welding wire from the wire feeder, through the gun cable and up to the contact tip. 3.5.5 Spool Gun Overview Spool Gun... - Page 23 Connect the earth cable quick connector to the negative welding power output socket. Connect the earth clamp to the work piece. Contact with the work piece must be firm contact with clean, bare metal, with no corrosion, paint or scale at the contact point. Connect the spool gun Euro plug to the wire feeder Euro connector.
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Page 24: Mig Welding
3.5.6 MIG Welding Definition of MIG Welding MIG (metal inert gas) welding also known as GMAW (gas metal arc welding) or MAG (metal active gas welding), is a semi-automatic or automatic arc welding process in which a continuous and consumable wire electrode and a shielding gas are fed through a welding gun. - Page 25 Travel Angle - Travel angle is the right to left angle relative to the direction of welding. A travel angle of 5°- 15° is ideal and produces a good level of control over the weld pool. A travel angle greater that 20°...
- Page 26 Travel Speed - Travel speed is the rate that the gun is moved along the weld joint and is usually measured in mm per minute. Travel speeds can vary depending on conditions and the welders skill and is limited to the welders ability to control the weld pool. Push technique allows faster travel speeds than Drag technique.
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Page 27: Welding Trouble Shooting
Welding trouble shooting 3.6.1 welding The following chart addresses some of the common problems of MIG welding. In all cases of equipment trouble malfunction, the manufacturer’s recommendations should be strictly adhered to and followed. shooting Trouble Possible Reason Suggested Remedy Wire feed speed set too high Select lower wire feed speed Voltage too high... -
Page 28: Mig Wire Feed Trouble Shooting
3.6.2 MIG wire The following chart addresses some of the common WIRE FEED problems during MIG welding. In all feed cases of equipment malfunction, the manufacturer’s recommendations should be strictly adhered trouble to and followed. shooting NO. Trouble Possible Reason Suggested Remedy Check that the TIG/MMA/MIG selector Wrong mode selected... -
Page 29: Operation Environment
Process reference for CO2 corner welding of low carbon steel solid welding wire Material Wire Welding Welding Welding Gas-flow thickness diameter current voltage speed rate (MM) (MM) (CM/MIN) (L/MIN) 70-80 17-18 50-60 10-15 85-90 18-19 50-60 10-15 1.0/1.2 100-110 18-19.5 50-60 10-15 120-130... -
Page 30: Maintenance
Maintenance & In order to guarantee safe and proper operation of welding machines, they must be maintained regularly. Troublesho- Let customers understand the maintenance procedure of welding machines. Enable customers to carry on simple examination and inspections. Do your best to reduce the fault rate and repair times of welding oting machines to lengthen service life of arc welding machine. -
Page 31: Troubleshooting
Troublesho- oting - Before the welding machines are dispatched from the factory, they have already been tested and calibrated accurately. It is forbidden for anyone who is not authorized by our company to do any change to the equipment! - Maintenance course must be operated carefully. If any wire becomes flexible or is misplaced, it maybe potential danger to user! - Only professional maintenance staff that isauthorized by our company could overhaul the machine! - Be sure to shut off the Main Input Power before doing any repair work on the welding machine! -
Page 32: List Of Error Code
List of error code Error Type Error code Description Lamp status Yellow lamp(thermal Over-heating(1st thermal relay) protection) always on Yellow lamp(thermal Over-heating(2nd thermal relay) protection) always on Yellow lamp(thermal Thermal relay Over-heating(3rd thermal relay) protection) always on Yellow lamp(thermal Over-heating(4th thermal relay) protection) always on Yellow lamp(thermal Over-heating(Program in default) -
Page 33: Electrical Schematic Drawing
Electrical schematic drawing... - Page 34 LOKERMANN Srl, Via Produzione 16/18, 37044, Cologna Veneta, (VR)-Italy, Tel: +39 0442 1722469 lokermann@lokermann.eu - www.lokermann.eu...
- Page 35 Troublesho- oting...