Miller Electric DWF3 User Manual

August 2000 Form: OM-179 078 Effective With Serial No. KG041900
OWNER’S
MANUAL
cyclomatic
Model DWF–3 Cold Wire Feeder System
Automatic Control For Supplying Filler Wire Into The Weld GTAW And PAW Stepper Motor For Accurate, Repeatable Feed Rates 120/240 Volts AC Input Power To Control Unit Overload Protection Automatic Wire Retract At End Of Weld Cycle
Read and follow these instructions and all safety blocks carefully.
Have only trained and qualified persons install, operate, or service this unit.
Call your distributor if you do not understand the directions.
cover 5/94 PRINTED IN USA
1996 MILLER Electric Mfg. Co.
For help, call your distributor or: MILLER Electric Mfg. Co., P.O. Box 1079,
Appleton, WI 54912 414-734-9821
From Miller to You
Thank you and congratulations on choosing Miller. Now you can get the job done and get it done right. We know you don’t have time to do it any other way.
That’s why when Niels Miller first started building arc welders in 1929, he made sure his products offered long-lasting value and superior quality. Like you, his customers couldn’t afford anything less. Miller products had to be more than the best they could be. They had to be the best you could buy.
Today, the people that build and sell Miller products continue the tradition. They’re just as committed to providing equipment and service that meets the high standards of quality and value established in 1929.
This Owner’s Manual is designed to help you get the most out of your Miller products. Please take time to read the Safety precautions. They will help you protect yourself against potential hazards on the worksite. We’ve
made installation and operation quick and easy. With Miller you can count on years of reliable service with proper maintenance. And if for some reason the unit needs repair, there’s a Troubleshooting section that will help you
Miller is the first welding equipment manufacturer in the U.S.A. to be registered to the ISO 9001 Quality System Standard.
Miller Electric manufactures a full line of welders and welding related equipment. For information on other quality Miller products, contact your local Miller distributor to receive the latest full line catalog or individual catalog sheets. To locate your nearest
distributor or service agency call 1-800-4-A-Miller, or visit us at www.MillerWelds.com on the web.
figure out what the problem is. The parts list will then help you to decide which exact part you may need to fix the problem. Warranty and service information for your particular model are also provided.
Working as hard as you do – every power source from Miller is backed by the most hassle-free warranty in the business.
Miller offers a Technical Manual which provides more detailed service and parts information for your unit. T o obtain a Technical Manual, contact your local distributor. Your distributor can also supply you with Welding Process Manuals such as SMAW, GTAW, GMAW, and GMA W-P.
ARC WELDING SAFETY PRECAUTIONS
WARNING
ARC WELDING can be hazardous.
PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER WEARERS KEEP AWAY UNTIL CONSULTING YOUR DOCTOR.
In welding, as in most jobs, exposure to certain hazards occurs. Welding is safe when precautions are taken. The safety information given below is only a summary of the more complete safety information that will be found in the Safety Standards listed on the next page. Read and follow all Safety Standards.
HAVE ALL INSTALLATION, OPERATION, MAINTENANCE, AND REPAIR WORK PERFORMED ONLY BY QUALIFIED PEOPLE.
ELECTRIC SHOCK can kill.
Touching live electrical parts can cause fatal shocks or severe burns. The electrode and work circuit is electrically live whenever the output is on. The input power circuit and machine internal circuits are also live when power is on. In semiautomatic or automatic wire welding, the wire, wire reel, drive roll housing, and all metal parts touching the welding wire are electrically live. Incorrectly installed or improperly grounded equipment is a hazard.
1. Do not touch live electrical parts.
2. Wear dry , hole-free insulating gloves and body protection.
3. Insulate yourself from work and ground using dry insulating mats or covers big enough to prevent any physical contact with the work or ground.
4. Disconnect input power or stop engine before installing or servicing this equipment. Lockout/tagout input power according to OSHA 29 CFR 1910.147 (see Safety Standards).
5. Properly install and ground this equipment according to its Owners Manual and national, state, and local codes.
6. Always verify the supply ground – check and be sure that input power cord ground wire is properly connected to ground terminal
in disconnect box or that cord plug is connected to a properly grounded receptacle outlet.
7. When making input connections, attach proper grounding conductor first – double-check connections.
8. Frequently inspect input power cord for damage or bare wiring – replace cord immediately if damaged – bare wiring can kill.
9. Turn off all equipment when not in use.
10. Do not use worn, damaged, undersized, or poorly spliced cables.
11. Do not drape cables over your body.
12. If earth grounding of the workpiece is required, ground it directly with a separate cable – do not use work clamp or work cable.
13. Do not touch electrode if you are in contact with the work, ground, or another electrode from a different machine.
14. Use only well-maintained equipment. Repair or replace damaged parts at once. Maintain unit according to manual.
15. Wear a safety harness if working above floor level.
16. Keep all panels and covers securely in place.
17. Clamp work cable with good metal-to-metal contact to workpiece or worktable as near the weld as practical.
ARC RAYS can burn eyes and skin; NOISE can damage hearing; FLYING SLAG OR SPARKS can injure eyes.
Arc rays from the welding process produce intense visible and invisible (ultraviolet and infrared) rays that can burn eyes and skin. Noise from some processes can damage hearing. Chipping, grinding, and welds cooling throw off pieces of metal or slag.
NOISE
1. Use approved ear plugs or ear muffs if noise level is high.
FUMES AND GASES can be hazardous to your health.
Welding produces fumes and gases. Breathing these fumes and gases can be hazardous to your health.
1. Keep your head out of the fumes. Do not breathe the fumes.
2. If inside, ventilate the area and/or use exhaust at the arc to remove welding fumes and gases.
3. If ventilation is poor, use an approved air-supplied respirator.
4. Read the Material Safety Data Sheets (MSDSs) and the manufacturer’s instruction for metals, consumables, coatings, cleaners, and degreasers.
CYLINDERS can explode if damaged.
Shielding gas cylinders contain gas under high pressure. If damaged, a cylinder can explode. Since gas cylinders are normally part of the welding process, be sure to treat them carefully.
1. Protect compressed gas cylinders from excessive heat, mechanical shocks, slag, open flames, sparks, and arcs.
2. Install cylinders in an upright position by securing to a stationary support or cylinder rack to prevent falling or tipping.
3. Keep cylinders away from any welding or other electrical circuits.
ARC RAYS
2. Wear a welding helmet fitted with a proper shade of filter to protect your face and eyes when welding or watching (see ANSI Z49.1 and Z87.1 listed in Safety Standards).
3. Wear approved safety glasses with side shields.
4. Use protective screens or barriers to protect others from flash and glare; warn others not to watch the arc.
5. Wear protective clothing made from durable, flame-resistant material (wool and leather) and foot protection.
5. Work in a confined space only if it is well ventilated, or while wearing an air-supplied respirator. Always have a trained watchperson nearby. Welding fumes and gases can displace air and lower the oxygen level causing injury or death. Be sure the breathing air is safe.
6. Do not weld in locations near degreasing, cleaning, or spraying operations. The heat and rays of the arc can react with vapors to form highly toxic and irritating gases.
7. Do not weld on coated metals, such as galvanized, lead, or cadmium plated steel, unless the coating is removed from the weld area, the area is well ventilated, and if necessary, while wearing a n air-supplied respirator. The coatings and any metals containing these elements can give off toxic fumes if welded.
4. Never drape a welding torch over a gas cylinder .
5. Never allow a welding electrode to touch any cylinder.
6. Never weld on a pressurized cylinder – explosion will result.
7. Use only correct shielding gas cylinders, regulators, hoses, and fittings designed for the specific application; maintain them and associated parts in good condition.
8. Turn face away from valve outlet when opening cylinder valve.
9. Keep protective cap in place over valve except when cylinder is in use or connected for use.
10. Read and follow instructions on compressed gas cylinders, associated equipment, and CGA publication P-1 listed in Safety Standards.
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WELDING can cause fire or explosion.
Welding on closed containers, such as tanks, drums, or pipes, can cause them to blow up. Sparks can fly off from the welding arc. The flying sparks, hot workpiece, and hot equipment can cause fires and burns. Accidental contact of electrode to metal objects can cause sparks, explosion, overheating, or fire. Check and be sure the area is safe before doing any welding.
1. Protect yourself and others from flying sparks and hot metal.
2. Do not weld where flying sparks can strike flammable material.
3. Remove all flammables within 35 ft (10.7 m) of the welding arc. If this is not possible, tightly cover them with approved covers.
4. Be alert that welding sparks and hot materials from welding can easily go through small cracks and openings to adjacent areas.
5. Watch for fire, and keep a fire extinguisher nearby .
6. Be aware that welding on a ceiling, floor, bulkhead, or partition can cause fire on the hidden side.
7. Do not weld on closed containers such as tanks, drums, or pipes, unless they are properly prepared according to A WS F4.1 (see Safety Standards).
8. Connect work cable to the work as close to the welding area as practical to prevent welding current from traveling long, possibly unknown paths and causing electric shock and fire hazards.
9. Do not use welder to thaw frozen pipes.
10. Remove stick electrode from holder or cut off welding wire at contact tip when not in use.
11. Wear oil-free protective garments such as leather gloves, heavy shirt, cuffless trousers, high shoes, and a cap.
12. Remove any combustibles, such as a butane lighter or matches, from your person before doing any welding.
WARNING
ENGINE EXHAUST GASES can kill.
Engines produce harmful exhaust gases.
ENGINE FUEL can cause fire or explosion.
Engine fuel is highly flammable.
1. Stop engine and let it cool off before checking or adding fuel.
2. Do not add fuel while smoking or if unit is near any sparks or open flames.
MOVING PARTS can cause injury.
Moving parts, such as fans, rotors, and belts can cut fingers and hands and catch loose clothing.
1. Keep all doors, panels, covers, and guards closed and securely in place.
2. Stop engine before installing or connecting unit.
SPARKS can cause BATTERY GASES TO EXPLODE; BATTERY ACID can burn eyes and skin.
Batteries contain acid and generate explosive gases.
ENGINES can be hazardous.
1. Use equipment outside in open, well-ventilated areas.
2. If used in a closed area, vent engine exhaust outside and away from any building air intakes.
3. Do not overfill tank – allow room for fuel to expand.
4. Do not spill fuel. If fuel is spilled, clean up before starting engine.
3. Have only qualified people remove guards or covers for maintenance and troubleshooting as necessary.
4. To prevent accidental starting during servicing, disconnect negative ( –) battery cable from battery.
5. Keep hands, hair, loose clothing, and tools away from moving parts.
6. Reinstall panels or guards and close doors when servicing is finished and before starting engine.
1. Always wear a face shield when working on a battery.
2. Stop engine before disconnecting or connecting battery cables.
3. Do not allow tools to cause sparks when working on a battery.
4. Do not use welder to charge batteries or jump start vehicles.
5. Observe correct polarity (+ and –) on batteries.
STEAM AND PRESSURIZED HOT COOLANT can burn face, eyes, and skin.
It is best to check coolant level when engine is cold to avoid scalding.
PRINCIPAL SAFETY STANDARDS
Safety in Welding and Cutting, ANSI Standard Z49.1, from American Welding Society, 550 N.W. LeJeune Rd, Miami FL 33126
Safety and Health Standards, OSHA 29 CFR 1910, from Superinten­dent of Documents, U.S. Government Printing Office, Washington, D.C.
20402.
Recommended Safe Practices for the Preparation for Welding and Cut­ting of Containers That Have Held Hazardous Substances, American
Welding Society Standard AWS F4.1, from American Welding Society , 550 N.W. LeJeune Rd, Miami, FL 33126
National Electrical Code, NFP A Standard 70, from National Fire Protec­tion Association, Batterymarch Park, Quincy, MA 02269.
sr1.1.1 2/94
1. If the engine is warm and checking is needed, follow steps 2 and 3.
2. Wear safety glasses and gloves and put a rag over cap.
3. Turn cap slightly and let pressure escape slowly before completely removing cap.
Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1, from Compressed Gas Association, 1235 Jefferson Davis Highway, Suite 501, Arlington, VA 22202.
Code for Safety in Welding and Cutting, CSA Standard W117.2, from Canadian Standards Association, Standards Sales, 178 Rexdale Bou­levard, Rexdale, Ontario, Canada M9W 1R3.
Safe Practices For Occupation And Educational Eye And Face Protec- tion, ANSI Standard Z87.1, from American National Standards Institute, 1430 Broadway, New York, NY 10018.
Cutting And Welding Processes, NFPA Standard 51B, from National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
! IMPORTANT !
THIS MANUAL HAS BEEN DESIGNED FOR EXPERIENCED WELDING EQUIPMENT OPERATORS AND MUST BE READ COMPLETELY BEFORE USING THIS EQUIPMENT. IF YOU LACK EXPERIENCE OR ARE UNFAMILIAR WITH THE PRACTICES AND SAFE OPERATION OF WELDING EQUIPMENT, PLEASE CONSULT YOUR FOREMAN. DO NOT ATTEMPT TO INSTALL, OPERATE, OR PERFORM MAINTENANCE ON THIS EQUIPMENT UNLESS YOU ARE QUALIFIED AND HAVE READ AND UNDERSTAND THIS MANUAL. IF IN DOUBT ABOUT INSTALLING OR OPERATING THIS EQUIPMENT, CONTACT YOUR DISTRIBUTOR OR THE CUSTOMER SERVICE DEPARTMENT.
DEFINITIONS
NOTE CAUTION WARNING DANGER
Throughout this manual, NOTE, CAUTION, WARNING and DANGER are inserted to call attention to particular information. The methods used to identity these highlights and the purpose for which each is used, are as follows:
NOTE
OPERATIONAL, PROCEDURAL, AND BACKGROUND INFORMATION WHICH AIDS THE OPERATOR IN THE USE OF THE MACHINE, HELPS THE SERVICEMAN IN THE PERFORMANCE OF MAINTENANCE, AND PREVENTS DAMAGE TO THE EQUIPMENT.
CAUTION
AN OPERATIONAL PROCEDURE WHICH, IF NOT FOLLOWED, MAY CAUSE MINOR INJURY TO THE OPERATOR, SERVICE PERSONNEL AND/OR BYSTANDERS.
WARNING
AN OPERATIONAL PROCEDURE WHICH, IF NOT FOLLOWED, MAY CAUSE SEVERE INJURY TO THE OPERATOR, SERVICE PERSONNEL, OR OTHERS IN THE OPERATING AREA.
DANGER
AN OPERATIONAL PROCEDURE WHICH, IF NOT FOLLOWED, WILL CAUSE SEVERE INJURY OR EVEN DEATH TO THE OPERATOR, SERVICE PERSONNEL OR BYSTANDERS.
EMF INFORMATION
NOTE
The following is a quotation from the General Conclusions Section of the U.S. Congress, Office of Technology Assessment, Biological
Effects of Power Frequency Electric & Magnetic Fields – Background Paper, OTA-BP-E-53 (Washington, DC: U.S.
Government Printing Office, May 1989): . . . there is now a very large volume of scientific findings based on experiments at the cellular level and from studies with animals and people which clearly establish that low frequency magnetic fields can interact with, and produce changes in, biological systems. While most of this work is of very high quality, the results are complex. Current scientific understanding does not yet allow us to interpret the evidence in a single coherent framework. Even more frustrating, it does not yet allow us t o draw definite conclusions about questions of possible risk or to offer clear science-based advice on strategies to minimize or avoid potential risks.
Considerations About Welding And The Effects Of Low Frequency Electric And Magnetic Fields
To reduce magnetic fields in the workplace, use the following procedures:
1. Keep cables close together by twisting or taping them.
2. Arrange cables to one side and away from the operator.
3. Do not coil or drape cables around the body.
4. Keep welding power source and cables as far away as practical.
5. Connect work clamp to workpiece as close to the weld as possible.
About Pacemakers:
The above procedures are among those also normally recommended for pacemaker wearers. Consult your doctor for complete information.
TABLE OF CONTENTS
DESCRIPTION
1.1 INTRODUCTION 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 CONTROL UNIT 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 WIRE DRIVE UNIT 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 WIRE GUIDE ASSEMBLY 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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INSTALLATION
2.1 GENERAL SET–UP 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 CONTROL UNIT LOCATION 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 WIRE DRIVE UNIT MOUNTING 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 WIRE GUIDE MOUNTING 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 CONDUIT LENGTH ADJUSTMENT 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 REMOTE CONTROLS 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 CHANGING RETRACT DISTANCE 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION
3.1 PRECAUTIONS 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 CONTROL DESCRIPTION – DWF–3 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 SEQUENCE OF OPERATION 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 REMOTE SIGNALS 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE AND REPAIR
4.1 MAINTENANCE REQUIREMENTS 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 GENERAL PRECAUTIONS 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 CONTROL UNIT CALIBRATION 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 DRIVE UNIT ASSEMBLY 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 TROUBLESHOOTING 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CIRCUIT DESCRIPTION
5.1 SPEED CONTROL CIRCUITS 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 DELAY TIMER CIRCUITS 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 DIGITAL DISPLAY CIRCUIT 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 MOTOR POWER SUPPLY CIRCUIT 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 1 DESCRIPTION
1.1 INTRODUCTION
Cold wire feed systems are designed for accurate application of filler wire into the weld or braze area. The DWF–3 is designed to be used for GTAW and PA W processes. The Digital Wire Feeder System is made up of a positive feeding wire drive with a zero backlash 3–axis wire manipulator. This combination of components produces exceptionally good wire feeding characteristics. Systems will accommodate wire sizes from .020 in diameter (.50 mm) to .094 in diameter (2.39 mm) and feed at an adjustable rate, continuously variable from 0 to 300 inches per minute. A standard DWF–3 system is shown in Figure 1.1.
1.2 CONTROL UNIT
The control unit uses solid state circuitry in its motor supply and control circuits and operates from a 115/230 VAC, 50/60 Hz line supply. Provisions have been made for forward or reverse jog to allow easy pre–positioning of the filler wire. Start of wire feed and control of speed may be accomplished both manually from the front panel or remotely through the interface connector located on the rear panel. The speed at which the wire will feed is pre–set through use of the ”PUSH TO SET” function on the front panel and can be controlled within 0.10 inch per minute increments. A digital readout of wire speed is provided. Start delay and stop delay timers are also provided for cycle control. Timers can be pre–set within 0.10 second intervals from 0 to 9.9 seconds.
1.3 WIRE DRIVE UNIT
The wire drive unit uses urethane rollers to grip the wire and feed it in either direction depending on the signals from the control unit. These rollers eliminate the need to change rollers when changing wire sizes from .020 in (.50 mm) diameter through .062 in (1.57 mm) diameter wire. Special rollers are required for .094 in (2.39 mm) diameter wire. All wire can be loaded into the drive while it is operating. There is no need to hand–feed the wire through the mechanism before operating. Inlet and exit guides are provided with the wire drive. One inlet guide covers the entire range of wire sizes from .020 in diameter (.50 mm) to .094 in (2.39 mm) diameter. Three exit guides cover the range of wire diameters. Two of the exit guides are for the .020 in through .062 in range. The third is for the .094 in wire. The guides are stored inside the drive housing. If a drive for .020 in – .062 in wire is ordered, then two exit and one inlet guide will be supplied. If a drive for .094 in wire is ordered, then one exit and one inlet guide will be supplied.
1.4 WIRE GUIDE ASSEMBLY
The wire guide assembly which is used with the DWF–3 wire drive unit consists of a guide mechanism, conduit, liners, and tip. The guide mechanism is constructed to allow full position adjustment for vertical, cross seam, feed angle and distance from the electrode. Tips and liners can be changed to suit the wire size being used (see information listed in Table 1.1) Standard length of the conduit supplied with the system is 36 in (914.4 mm). The length may be shortened by following steps 2.5A through 2.5D in the installation section.
TABLE 1.1 WIRE GUIDE DETAILS
WIRE SIZE ROLLER EXIT GUIDE LINER GUIDE TIP .020 in (.50 mm) 179 170 179 173 179 184 – .030 in (.76 mm) 179 170 179 173 179 184 – .035 in (.89 mm) 179 170 179 173 179 184 – .045 in (1.1 mm) 179 170 179 173 179 184 – .062 in (1.5 mm) 179 170 179 185
OM-179 078 1-1
SECTION 1 DESCRIPTION
You may also order a combination of the wire guide mechanism, tip, conduit assembly, and conduit liner together as follows:
.020 – .062 in dia. 179 165*
*This includes all tips necessary for operation of .020 – .062 in dia. wire in one package.
Figure 1.1, DIGITAL WIRE FEED SYSTEM
OM-179 078 1-2
SECTION 2 INSTALLATION
2.1 GENERAL SET–UP
A standard DWF–3 system is illustrated in Figure 2.1 with the necessary interconnections shown for a typical installation. The parts are listed below:
DWF–3 (.020 – .062) CONTROL UNIT 179 166 WIRE DRIVE UNIT 179 164 WIRE GUIDE ASSEMBLY 179 165
2.2 CONTROL UNIT LOCATION
The control unit should be placed in a location which provides easy access to the controls and proper air ventilation for cooling. Adequate ventilation is provided by maintaining a minimum of 5 in (127 mm) of unrestricted space between the control unit sides and rear and the nearest obstruction. The location should be selected to minimize any dust, dirt, moisture or corrosive vapors the control unit could be subjected to. Control unit outline dimensions are given in Figure 2.2.
CAUTION
THE CONTROL UNIT CAN OPERATE ON EITHER 100/120 VOLTS OR 208/230 VOL TS AC, 50 OR 60 HZ. BE SURE TO SELECT THE PROPER INPUT VOLTAGE ON THE REAR PANEL BEFORE CONNECTING TO POWER.
2.3 WIRE DRIVE UNIT MOUNTING
Figure 2.3 is an outline and a mounting dimension guide. The drive unit may be mounted using the inlet guide surface or the bottom surface (opposite the adjusting knob) through use of the existing tapped holes in the housing. The wire drive exit guide has a 7/16 – 20 UNF external thread for mating with the supplied wire guide conduit for a DWF–3 system.
CAUTION
IN APPLICATIONS WHERE HIGH FREQUENCY OR CAPACITIVE DISCHARGE START IS USED THE DRIVE HOUSING SHOULD BE GROUNDED TO THE SAME POTENTIAL AS THE WORKPIECE. THIS WILL PREVENT POSSIBLE DAMAGE TO THE WIRE FEED DRIVE,CAUSED BY ARCING. GROUNDING CAN BE ACCOMPLISHED THROUGH THE UNUSED THREADED MOUNTING HOLES IN THE DRIVE HOUSING.
OM-179 078 2-1
SECTION 2 INSTALLATION
Figure 2.1, DIGITAL WIRE FEED INSTALLATION
OM-179 078 2-2
SECTION 2 INSTALLATION
Figure 2.2, CONTROL UNIT OUTLINE
OM-179 078 2-3
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