Lincoln Electric SVM186-A service manual Input and Grounding Connections

Page 13

A-5

INSTALLATION

A-5

 

 

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

MACHINE GROUNDING AND HIGH FRE- QUENCY INTERFERENCE PROTECTION

Locate the Precision TIG® 225 away from radio controlled machinery. The normal operation of the Precision TIG® 225 may adversely affect the operation of RF controlled equipment, which may result in bodily injury or damage to the equipment.

This welder must be grounded! See your local and national electrical codes for proper grounding meth- ods.

The high frequency generator, being similar to a radio transmitter, may cause radio, TV and electronic equip- ment interference problems. These problems may be the result of radiated interference. Proper grounding methods can reduce or eliminate radiated interference.

Radiated interference can develop in the following four ways:

1.Direct interference radiated from the welder.

2.Direct interference radiated from the welding leads.

3.Direct interference radiated from feedback into the power lines.

4.Interference from re-radiation of “pickup” by unground- ed metallic objects.

Keeping these contributing factors in mind, installing equipment per the following instructions should minimize problems.

1.Keep the welder power supply lines as short as possi- ble and enclose as much of them as possible in rigid metallic conduit or equivalent shielding for a distance of 50 feet (15.2m). There should be good electrical con- tact between this conduit and the welder case ground. Both ends of the conduit should be connected to a dri- ven ground and the entire length should be continuous.

2.Keep the work and electrode leads as short as possi- ble and as close together as possible. Lengths should not exceed 25 ft (7.6m). Tape the leads together when practical.

3.Be sure the torch and work cable rubber coverings are free of cuts and cracks that allow high frequency leak- age.

4.Keep the torch in good repair and all connections tight to reduce high frequency leakage.

5.The work piece must be connected to an earth ground close to the work clamp, using one of the following methods:

a)A metal underground water pipe in direct contact with the earth for ten feet or more.

b)A 3/4” (19mm) galvanized pipe or a 5/8” (16mm)solid galvanized iron, steel or copper rod driven at least eight feet into the ground.

The ground should be securely made and the ground- ing cable should be as short as possible using cable of the same size as the work cable, or larger. Grounding to the building frame electrical conduit or along pipe system can result in re-radiation, effectively making these members radiating antennas.

6.Keep covers and all screws securely in place.

7.Electrical conductors within 50 ft (15.2m) of the welder should be enclosed in grounded rigid metallic conduit or equivalent shielding, wherever possible. Flexible metallic conduit is generally not suitable.

8.When the welder is enclosed in a metal building,the metal building should be connected to several good earth driven electrical grounds (as in 5 (b) above) around the periphery of the building.

Failure to observe these recommended installation proce- dures can cause radio or TV and electronic equipment interference problems and result in unsatisfactory welding performance resulting from lost high frequency power.

INPUT AND GROUNDING CONNECTIONS

Only a qualified electrician should connect the PRECI- SION TIG® 225. Installation should be made in accor- dance with the appropriate National Electrical Code, all local codes and the information in this manual.

Be sure the voltage, phase, and frequency of the input power is as specified on the rating plate, located on the rear of the machine.

208/230 volt models have a NEMA 6-50P plug attached to the #6-3 input power cord and a NEMA 6 -50R receptacle is included with the Ready-Pak™ models. Other voltage models have an #12-3 input power cord but no plug or receptacle.

Have a qualified electrician provide input power supply to the receptacle or cord in accordance with all local and national electrical codes. Use a single phase line or one phase of a two or three phase line. Choose an input and grounding wire size according to local or national codes. Refer to the Technical Specifications page at the begin- ning of this section. Fuse the input circuit with the recom- mended super lag fuses or delay type1 circuit breakers. Using fuses or circuit breakers smaller than recommend- ed may result in “nuisance” shut-offs from welder inrush currents even if not welding at high currents.

1Also called “inverse time” or “thermal/magnetic” circuit breakers; circuit breakers which have a delay in tripping action that decreases as the magnitude of the current increases.

PRECISION TIG® 225

Page 12 Page 14
Image 13
Page 12 Page 14
Contents Precision TIG ISAFETYi Fumes and Gases SafetyFor Electrically Powered equipmentSûreté Pour Soudage a LʼArc Précautions DE SûretéElectromagnetic Compatibility EMC Safety Master Table of Contents for ALL Sections Table of Contents Installation Section Input Single Phase only InstallationK2533-2 Input at Rated Output Model Height Width Depth WeightSelect Suitable Location Mounting Safety PrecautionsLifting and Moving TiltingInput and Grounding Connections Return Section TOC Input Reconnect ProcedureConnections for Stick Smaw Welding Connections for TIG Gtaw WeldingPrecision TIG Table of Contents Operation Section Operation Recommended Processes and EQUIP- Ment Product DescriptionControl Functionality Figure B.1 Control PanelPOWER-UP Sequence Machine Rating Plate Case Rear ComponentsOperating Steps Welding in TIG ModePulse TIG Control Operation Turn the power switch to on Welding in Stick ModePrecision TIG Table of Contents Accessories Section Standard Equipment Packages AccessoriesTable C.1 Table C.2 Factory Installed OptionsK2348-1 Under-Storage Cart Field Installed OptionsTable of Contents Maintenance Section Safety Precautions MaintenanceRoutine and Periodic Maintenance Spark GAP Adjustment1TABLE of CONTENTS-THEORY of Operation Section E-1 Theory of Operation Input Power CircuitGeneral Description Protected Output Rectification Feedback ControlFigure E.2 High Voltage/High Frequency Circuit High Voltage / High Frequency CircuitFigure E.5 DC Welding Current Generation DC Welding OutputFigure E.6 AC Square Wave Welding Current Generation AC Welding OutputFigure E.7 SCR Operation SCR OperationThermal Protection Protective CircuitsOverload Protection VAC Receptacle1TABLE of Contents Troubleshooting and Repair F-1 HOW to USE Troubleshooting Guide Troubleshooting and RepairWorkstations PC Board Troubleshooting ProceduresPerform the T1 Transformer Amptrol is depressed Troubleshooting and Repair Perform the SCR Bridge Test Possible Areas Misadjustments Problems SymptomsRecommended Course of Action Troubleshooting and Repair Troubleshooting and Repair Problems Symptoms Electric Shock can Perform the SCR Bridge Test Stick electrode Blasts Off when Weld current may be set too Test Description High Frequency Circuit Disable ProcedureMaterials Needed Figure F.1 Spark GAP Assembly ProcedureT1 Transformer Test T1 Transformer Test Primary Windings Primary Voltages Precision TIG Static SCR Test Precision TIG 225 Control Test ProcedureCase Cover Removal and Replacement Procedure Precision TIG Active SCR Test Active SCR Test Figure F.6 SCR Gate Locations Precision TIG Scope Settings Normal Open Circuit Voltage Waveform AC TIG ModeNormal Open Circuit Voltage Waveform DC TIG Mode Normal Open Circuit Voltage Waveform AC Stick Mode Normal Open Circuit Voltage Waveform DC Stick Mode Typical Output Voltage Waveform Machine Loaded AC TIG ModeMachine Loaded to 180 Amps AT 16VDC DC TIG Mode Machine Loaded to 180 Amps AT 26VDC AC Stick ModeDC Stick Mode Troubleshooting and Repair Precision TIG SCR Bridge Assembly Removal and Replacement Procedure Figure F.7 Case Back Mounting Screws SCR Bridge AssemblyProcedure Plug J2 Removed Replacement Procedure Precision TIG Polarity Switch Removal and Replacement Procedure Removal Procedure Polarity SwitchReplacement Procedure Precision TIG High Voltage Transformer Removal and Replacement Procedure Transformer Secondary Leads High Voltage TransformerFigure F.12 High Voltage Transformer Mounting Insulators Precision TIG 53F-53 Perform the SCR Bridge Assembly Replacement Procedure Input Idle Amps Retest After RepairRecommended Meters for Machine Output Tests Precision TIG Table of Contents Diagram Section Electrical Diagrams Schematic Complete Machine ALL Codes G5647 Schematic Control PC Board #1 G5640 Schematic Control PC Board #2 G5640 Schematic Control PC Board #3 G5640 PC Board Assembly Control #1 G5641 PC Board Assembly Control #2 G5641 1B0-S22530 PC Board Assembly Bypass L10121

SVM186-A specifications

The Lincoln Electric SVM186-A is a versatile and highly efficient welding machine that stands out in the competitive landscape of industrial welding equipment. Designed to meet the needs of both professionals and hobbyists, this machine combines advanced technology with robust construction, delivering outstanding performance in various welding applications.

One of the standout features of the SVM186-A is its multi-process capability. This welding machine can handle MIG, TIG, and Stick welding processes, making it suitable for a diverse range of projects, from light fabrication to heavy-duty work. This flexibility reduces the need for multiple machines, saving time and space for users who require versatility in their welding operations.

The SVM186-A is powered by a reliable and durable inverter technology, which ensures a stable arc and efficient operation across different materials, including stainless steel, aluminum, and mild steel. This inverter technology not only enhances performance but also reduces energy consumption, making it an environmentally friendly choice.

Another notable characteristic of the SVM186-A is its user-friendly interface. The digital display provides real-time information on voltage and wire feed speed, allowing welders to easily adjust settings for optimal results. This intuitive control panel design makes it accessible for both novice welders and seasoned professionals who value precision.

The machine is also built with safety features in mind. It comes equipped with overcurrent protection and thermal overload protection to prevent damage during operation. This ensures that users can work confidently, knowing that the equipment is designed to handle demanding tasks while prioritizing safety.

Portability is another advantage of the SVM186-A. Weighing in at a relatively light weight compared to other industrial welders, this machine is designed for ease of transport. Whether working on-site or in a workshop, welders can easily move the equipment as needed.

In summary, the Lincoln Electric SVM186-A is a sophisticated welding machine that merges technology and practicality. Its multi-process capability, inverter technology, user-friendly interface, safety features, and portability make it a top choice for those seeking dependable and efficient welding solutions. Whether for professional fabrication or personal projects, the SVM186-A is equipped to handle the demands of modern welding tasks with exceptional ease and effectiveness.
Top Page Image Contents