MK Products CobraMig 260 PS User Manual

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CobraMig 260 Power Supply/Wire Feeder

208V 230V 416V 480V Multi-Tap Voltage Version

16882 Armstrong Ave., Irvine, California 92606 TEL(949)863-1234 FAX(949)474-1428 www.mkproducts.com

SAFETY CONSIDERATIONS

ELECTRIC ARC WELDING EQUIPMENT

CAUTION : READ BEFORE ATTEMPTING INSTALLATION, OPERATION OR

MAINTENANCE OF THIS EQUIPMENT

1-1 INTRODUCTION

This equipment is intended for ultimate application by commercial/industrial users and for operation by persons trained and experienced in the use and maintenance of welding equipment. Operation should not be undertaken without adequate training in the use of such equipment. Training is available from many public and private schools or similar facilities.

Safe practices in the installation, operation and maintenance of this equipment requires proper training in the art, a careful study of the information provided with the equipment, and the use of common sense. Rules for safe use are generally provided by suppliers of welding power sources, compressed gas suppliers, and electrode suppliers. Careful compliance with these rules will promote safe use of this equipment.

The following Safety Rules cover some of the more generally found situations. READ THEM CAREFULLY. In case of any doubt, obtain qualiﬁ ed help before proceeding.

1-2 GENERAL PRECAUTIONS

A. Burn Prevention

ELECTRIC ARC WELDING PRODUCES HIGH INTENSITY HEAT AND ULTRAVIOLET RADIANT ENERGY WHICH MAY CAUSE SERIOUS AND PERMANENT EYE DAMAGE AND WHICH MAY DAMAGE ANY EXPOSED SKIN AREAS.

Wear helmet with safety goggles or glasses with side shields underneath, appropriate ﬁ lter lenses or plates (protected by clear cover glass). This is a must for welding or cutting (and chipping) to protect the eyes from radiant energy and ﬂ ying metal. Replace cover glass when broken, pitted, or spattered.

Medical ﬁ rst aid and eye treatment. First aid facilities and a qualiﬁ ed ﬁ rst aid person should be available for each shift unless medical facilities are close by for immediate treatment of ﬂ ash burns of the eyes and skin burns.

Wear protective clothing - leather (or asbestos) gauntlet gloves, hat, and high safety-toe shoes. Button shirt collar and pocket ﬂ aps, and wear cufﬂ ess trousers to avoid entry of sparks and slag.

Avoid oily or greasy clothing. A spark may ignite them.

Flammable hair preparations should not be used by persons intending to weld or cut.

Hot metal such as electrode stubs and work pieces should never be handled without gloves.

Ear plugs should be worn when working on overhead or in a conﬁ ned space. A hard hat should be worn when others work overhead.

B. Toxic Fume Prevention

WARNING: The use of this product may result

in exposure to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Adequate ventilation. Severe discomfort, illness or death can result from fumes, vapors, heat, or oxygen enrichment or depletion that welding (or cutting) may produce. Prevent them with adequate ventilation. NEVER ventilate with oxygen.

Lead-, cadmium-, zinc-, mercury-, beryllium-bearing and similar materials, when welded or cut, may produce harmful concentrations of toxic fumes. Adequate local exhaust ventilation must be used, or each person in the area, as well as the operator, must wear an air-supplied respirator. For beryllium, both must be used.

Metals coated with or containing materials that emit toxic fumes should not be heated unless coating is removed form the work surface, the area is well ventilated, or the operator wears an air-supplied respirator.

Work in a conﬁ ned space only while it is being ventilated and, if necessary, while wearing an airsupplied respirator.

Gas leaks in a conﬁ ned space should be avoided. Leaked gas in large quantities can change oxygen concentration dangerously. Do not bring gas cylinders into a conﬁ ned space.

Leaving conﬁ ned space, shut OFF gas supply at source to prevent possible accumulation of gases in the space if downstream valves have been accidentally opened or left open. Check to be sure that the space is safe before reentering it.

Vapors from chlorinated solvents can be decomposed by the heat of the arc (or ﬂ ame) to form PHOSGENE, a highly toxic gas, and other lung and eye irritating products. The ultraviolet (radiant) energy of the arc can also decompose trichloroethylene and perchloroethylene vapors to form phosgene. DO NOT WELD or cut where solvent vapors can be drawn into the welding or cutting atmosphere or where the radiant energy can penetrate to atmospheres containing even minute amounts of trichloroethylene or perchloroethylene.

C. Fire and Explosion Prevention

Causes of ﬁ re and explosion are: combustibles reached by the arc, ﬂ ame, ﬂ ying sparks, hot slag, or heated material, misuse of compressed gases and cylinders, and short circuits.

BE AWARE THA T ﬂ ying sparks or falling slag can pass through cracks, along pipes, through windows or doors, and through wall or ﬂ oor openings, out of sight of the goggled operator. Sparks can ﬂ y many feet.

To prevent ﬁ res and explosion: Keep equipment clean and operable, free of oil,

grease, and (in electrical parts) of metallic particles that can cause short circuits.

If combustibles are in area, do NOT weld or cut. Move the work if practicable, to an area free of

combustibles. Avoid paint spray rooms, dip tanks, storage areas, ventilators. If the work cannot be moved, move combustibles at least 35 feet away, out of reach of sparks and heat; or protect against ignition with suitable and snugﬁ tting, ﬁ re-resistant covers or shields.

Walls touching combustibles on opposite sides should not be welded on (or cut). Walls, ceilings, and ﬂ oor near work should be protected by heat-resistant covers or shields.

Fire watcher must be standing by with suitable ﬁ re extinguishing equipment during and for some time after welding or cutting if:

1. Appreciable combustibles (including building construction) are within 35 feet.

2. Appreciable combustibles are further than 35 feet, but can be ignited by sparks.

3. Openings (concealed or visible) in ﬂ oors or walls within 35 feet may expose combustibles to sparks.

4. Combustibles adjacent to walls, ceilings, roofs, or metal partitions can be ignited by radiant or conducted heat.

Hot work permit should be obtained before operation to ensure supervisor’s approval that adequate precautions have been taken.

After work is done, check that area is free of sparks, glowing embers, and ﬂ ames.

An empty container that held combustibles, or that can produce ﬂ ammable or toxic vapors when heated, must never be welded on or cut, unless container has ﬁ rst been cleaned in accor- dance with industry standards.

This includes: a thorough steam or caustic cleaning (or a solvent of water washing, depending on the combustible’s solubility), followed by purging and inerting with nitrogen or carbon dioxide, and using protective equipment.

Water-ﬁ lling just below working level may substi- tute for inerting.

A container with unknown contents should be cleaned (see paragraph above). Do NOT depend on sense of smell or sight to determine if it is safe to weld or cut.

Hollow castings or containers must be vented before welding or cutting. They can explode.

Explosive atmospheres. NEVER weld or cut where the air may contain ﬂ ammable dust, gas, or liquid vapors (such as gasoline).

D. Compressed Gas Equipment

The safe handling of compressed gas equipment is detailed in numerous industry publications. The following general rules cover many of the most common situations.

1. Pressure Regulators Regulator relief valve is designed to protect

only the regulator from overpressure; it is not

intended to protect any downstream equipment. Provide such protection with one or more relief devices.

Never connect a regulator to a cylinder containing gas other than that for which the regulator was designed.

Remove faulty regulator from service immediately for repair (ﬁ rst close cylinder valve). The following symptoms indicate a faulty regulator:

Leaks - if gas leaks externally. Excessive Creep - if delivery pressure continues

to rise with downstream valve closed. Faulty Gauge - if gauge pointer does not move

off stop pin when pressurized, nor returns to stop pin after pressure release.

Repair. Do NOT attempt repair. Send faulty regulators for repair to manufacturer’s designated repair center, where special techniques and tools are used by trained personnel.

2. Cylinders Cylinders must be handled carefully to prevent

leaks and damage to their walls, valves, or safety devices:

Avoid electrical circuit contact with cylinders including third rails, electrical wires, or welding circuits. They can produced short circuit arcs that may lead to a serious accident. (See 1-3C)

ICC or DOT marking must be on each cylinder. It is an assurance of safety when the cylinder is properly handled.

Identifying gas content. Use only cylinders with name of gas marked on them; do not rely on color to identify gas content. Notify supplier if unmarked. NEVER DEFACE or alter name, number, or other markings on a cylinder. It is illegal and hazardous.

Empties: Keep valves closed, replace caps securely; mark MT; keep them separate from FULLS, and return promptly.

Prohibited use. Never use a cylinder or its contents for other than its intended use, NEVER as a support or roller.

Locate or secure cylinders so they cannot be knocked over.

Passageways and work areas. Keep cylinders clear of areas where they may be stuck.

Transporting cylinders. With a crane, use a secure support such as a platform or cradle. Do NOT lift cylinders off the ground by their valves or caps, or by chains, slings, or magnets.

Do NOT expose cylinders to excessive heat, sparks, slag, and ﬂ ame, etc. that may cause rupture. Do not allow contents to exceed 55 degrees C (130 degrees F.) Cool with water spray where such exposure exists.

Protect cylinders, particularly valves from bumps, falls, falling objects, and weather. Replace caps securely when moving cylinders.

Stuck valve. Do NOT use a hammer or wrench to open a cylinder valve that cannot be opened by hand. Notify your supplier.

Mixing gases. NEVER try to mix any gases in a cylinder.

NEVER reﬁ ll any cylinder. Cylinder ﬁ ttings should never be modiﬁ ed or

exchanged.

3. Hose Prohibited use. Never use hose other than that

designed for the speciﬁ ed gas. A general hose identiﬁ cation rule is: red for fuel gas, green for oxygen, and black for inert gases.

Use ferrules or clamps designed for the hose (not ordinary wire or other substitute) as a binding to connect hoses to ﬁ ttings.

No copper tubing splices. Use only standard brass ﬁ ttings to splice hose.

Avoid long runs to prevent kinks and abuse. Suspend hose off ground to keep it from being run over, stepped on, or otherwise damaged.

Coil excess hose to prevent kinks and tangles. Protect hose from damage by sharp edges, and by

sparks, slag, and open ﬂ ame. Examine hose regularly for leaks, wear, and loose

connections. Immerse pressured hose in water; bubbles indicate leaks

Repair leaky or worn hose by cutting area out and splicing. Do NOT use tape.

4. Proper Connections Clean cylinder valve outlet of impurities that

may clog oriﬁ ces and damage seats before con- necting regulator. Except for hydrogen, crack valve momentarily, pointing outlet away from people and sources of ignition. Wipe with a clean, lintless cloth.

Match regulator to cylinder. Before connecting, check that the regulator label and cylinder marking agree, and that the regulator inlet and cylinder outlet match. NEVER Connect a regulator designed for a particular gas or gases to a cylinder containing any other gas.

Tighten connections. When assembling threaded connections, clean and smooth seats where necessary. Tighten. If connection leaks, disassemble, clean, and retighten, using properly ﬁ tting wrench.

Adapters. Use a CGA adapter (available from your supplier) between cylinder and regulator, if one is required. Use two wrenches to tighten adapter marked RIGHT and LEFT HAND threads.

Regulator outlet (or hose) connections may be identiﬁ ed by right hand threads for oxygen and left hand threads (with grooved hex on nut or shank) for fuel gas.

5. Pressurizing Steps: Drain regulator of residual gas through suitable vent

before opening cylinder (or manifold valve) by turning adjusting screw in (clockwise). Draining prevents excessive compression heat at high pressure seat by allowing seat to open on pressurization. Leave adjusting screw engaged slightly on singlestage regulators.

Stand to side of regulator while opening cylinder valve.

Open cylinder valve slowly so that regulator pressure increases slowly. When gauge is pressurized (gauge reaches regulator maximum) leave cylinder valve in following position: for oxygen and inert gases, open fully to seal stem against possible leak; for fuel gas, open to less than one turn to permit quick emergency shut-off.

Use pressure charts (available from your supplier) for safe and efﬁ cient recommended pressure set- tings on regulators.

Check for leaks on ﬁ rst pressurization and reg- ularly thereafter. Brush with soap solution. Bubbles indicate leaks. Clean off soapy water after test; dried soap is combustible.

E. User Responsibilities

Follow all Safety Rules. Remove leaky or defective equipment from ser-

vice immediately for repair. Read and follow user manual instructions.

F. Leaving Equipment Unattended

Close gas supply at source and drain gas.

G. Rope Staging-Support

Rope staging-support should not be used for welding or cutting operation; rope may burn.

1-3 ARC WELDING

Comply with precautions in 1-1, 1-2, and this section. Arc Welding, properly done, is a safe process, but a careless operator invites trouble. The equipment carries high currents at signiﬁ - cant voltages. The arc is very bright and hot. Sparks ﬂ y, fumes rise, ultraviolet and infrared energy radiates, weldments are hot, and compressed gases may be used. The wise operator avoids unnecessary risks and protects himself and others from accidents.

A. Burn Protection

Comply with precautions in 1-2. The welding arc is intense and visibly bright.

Its radiation can damage eyes, penetrate lightweight clothing, reﬂ ect from light-colored sur- faces, and burn the skin and eyes. Skin burns resemble acute sunburn; those from gas-shielded arcs are more severe and painful. DON’T GET BURNED; COMPLY WITH PRECAUTIONS.

1. Protective Clothing Wear long-sleeve clothing in addition to gloves,

hat, and shoes. As necessary, use additional protective clothing such as leather jacket or sleeves, ﬂ ameproof apron, and ﬁ re-resistant leg- gings. Avoid outer garments of untreated cotton.

Bare skin protection. Wear dark, substantial clothing. Button collar to protect chest and neck, and button pockets to prevent entry of sparks.

2. Eye and Head Protection Protect eyes from exposure to arc. Eyes may

be damaged by radiant energy when exposed to the electric arc, even when not looking in the direction of the arc. Never look at an electric arc without protection.

Welding helmet or shield containing a ﬁ lter plate shade no. 12 or denser must be used when welding. Place over face before striking arc.

Protect ﬁ lter plate with a clear cover plate. Cracked or broken helmet or shield should NOT

be worn; radiation can be passed through to cause burns.

Cracked, broken, or loose ﬁ lter plates must be replaced IMMEDIATELY. Replace clear cover plate when broken, pitted, or spattered.

Flash goggles with side shields MUST be worn under the helmet to give some protection to the eyes should the helmet not be lowered over the face before an arc is struck. Looking at an arc

momentarily with unprotected eyes (particularly a high intensity gas-shielded arc) can cause a retinal burn that may leave a permanent dark area in the ﬁ eld of vision.

3. Protection of Nearby Personnel Enclose the welding area. For production weld-

ing, a separate room or enclosed bay is best. In open areas, surround the operation with lowreﬂ ective, noncombustible screens or panels. Allow for free air circulation, particularly at ﬂ oor level.

Viewing the weld. Provide face shields for all persons who will be looking directly at the weld.

Others working in area. See that all persons are wearing ﬂ ash goggles.

Before starting to weld, make sure that screen ﬂ aps or bay doors are closed.

B. Toxic Fume Prevention

Comply with precautions in 1-2B. Generator engine exhaust must be vented to the

outside air. Carbon monoxide can kill.

C. Fire and Explosion Prevention

Comply with precautions in 1-2C. Equipment’s rated capacity. Do not overload arc

welding equipment. It may overheat cables and cause a ﬁ re.

Loose cable connections may overheat or ﬂ ash and cause aﬁ re.

Never strike an arc on a cylinder or other pressure vessel. It creates a brittle area that can cause a violent rupture or lead to such a rupture later under rough handling.

D. Compressed Gas Equipment

Comply with precautions in 1-2D.

E. Shock Prevention

Exposed electrically hot conductors or other bare metal in the welding circuit, or in ungrounded, electrically-HOT

equipment can fatally shock a person whose body becomes a conductor. DO NOT STAND, SIT, LIE, LEAN ON, OR TOUCH a wet surface when welding without suitable protection.

To protect against shock: Keep body and clothing dry. Never work in

damp area without adequate insulation against electrical shock. Stay on a dry duckboard, or rubber mat when dampness or sweat cannot be avoided. Sweat, sea water, or moisture between body and an electrically HOT part - or grounded metal - reduces the body surface electrical resistance, enabling dangerous and possibly lethal currents to ﬂ ow through the body.

1. Grounding the Equipment When installing, connect the frames of each

unit such as welding power source, control, work table, and water circulator to the building ground. Conductors must be adequate to carry ground currents safely. Equipment made electrically HOT by stray currents may shock, possibly fatally. Do NOT GROUND to electrical conduit, or to a pipe carrying ANY gas or a ﬂ ammable liquid such as oil or fuel.

Three-phase connection. Check phase requirement of equipment before installing. If only three-phase power is available, connect single-

phase equipment to only two wires of the threephase line. Do NOT connect the equipment ground lead to the third (live) wire, or the equipment will become electrically HOT - a dangerous condition that can shock, possibly fatally.

Before welding, check ground for continuity. Be sure conductors are touching bare metal of equipment frames at connections.

If a line cord with a ground lead is provided with the equipment for connection to a switch box, connect the ground lead to the grounded switch box. If a three-prong plug is added for connection to a grounded mating receptacle, the ground lead must be connected to the ground prong only. If the line cord comes with a three-prong plug, connect to a grounded mating receptacle. Never remove the ground prong from a plug, or use a plug with a broken ground prong.

2. Connectors Fully insulated lock-type connectors should be used

to join welding cable lengths.

3. Cables Frequently inspect cables for wear, cracks, and

damage. IMMEDIATELY REPLACE those with excessively worn or damaged insulation to avoid possibly lethal shock from bared cable. Cables with damaged areas may be taped to give resistance equivalent to original cable.

Keep cable dry, free of oil and grease, and protected from hot metal and sparks.

4. Terminals and Other Exposed Parts Terminals and other exposed parts of electrical

units should have insulating covers secured before operation.

5. Electrode Wire Electrode wire becomes electrically HOT when the

power switch of gas metal-arc welding equipment is ON and welding gun trigger is pressed. Keep hands and body clear of wire and other HOT parts.

6. Safety Devices Safety devices such as interlocks and circuit break-

ers should not be disconnected or shunted out. Before installation, inspection, or service of equip-

ment, shut OFF all power, and remove line fuses (or lock or red-tag switches) to prevent accidental turning ON of power. Disconnect all cables from welding power source, and pull all 115 volts linecord plugs.

Do not open power circuit or change polarity while welding. If, in an emergency, it must be disconnected, guard against shock burns or ﬂ ash from switch arcing.

Leaving equipment unattended. Always shut OFF, and disconnect all power to equipment.

Power disconnect switch must be available near the welding power source.

Table of Contents

Saftey Guidelines ...........................................................................i

Installation ........................................................................Section A

Technical Speciﬁ cations ....................................................................................1

Machine Location ............................................................................................1

Input Power Connections ...................................................................................1

Machine Grounding ..........................................................................................3

Welding Torch Connections .................................................................................3

Shielding Gas Connections .................................................................................4

Coolant Connection .........................................................................................5

Wire Threading Procedure ..................................................................................5

Operation ..........................................................................Section B

General Description .........................................................................................6

Controls and Settings .......................................................................................7

Posa Start Operating Procedure ...........................................................................8

Process Settings ..............................................................................................9

Sample Setup - Aluminium ............................................................................... 10

Sample Setup - Stainless .................................................................................. 12

Sample Setup - Steel ...................................................................................... 14

Accessories ........................................................................Section C

Optional Kits ................................................................................................ 16

Maintenance ......................................................................Section D

Routine Maintenance ...................................................................................... 16

Power Supply ............................................................................................... 16

Testing the Feeder ......................................................................................... 17

Testing the Torch .......................................................................................... 17

Testing the Speed Control ................................................................................ 17

T roubleshooting ..................................................................Section E

Warning ..................................................................................................... 18

Troubleshooting Guide .................................................................................... 19

Troubleshooting Flow Charts ............................................................................. 20

Diagrams/Parts List .............................................................Section F

Table of Contents .......................................................................................... 31

Main PC Board .............................................................................................. 32

Mechanical .................................................................................................. 33

Electrical .................................................................................................... 48

Warranty Repair Stations

Safety Warnings

Warranty

Section A Installation

Technical Speciﬁ cations

Wire Diameter Capacity ............030 - 1/16" ALL Types, .023 hard wires

Wire Capacity ............................12" Standard (Insulated or Non-Insulated)

Power Input, user

selectable by jumpers .............208 VAC 60 Hz, 50 amperes, single phase

....................................................230 VAC 60 Hz, 45 amperes, single phase

....................................................416 VAC 60 Hz, 26 amperes, single phase

....................................................480 VAC 60 Hz, 24 amperes, single phase

Rated Output @ 60%

duty cycle ..................................260 amperes @ 26 Vdc - (8.7KW)

....................................................2 ranges (12-22V) (22-32V)

....................................................40 Vdc max OCV

Weight ........................................230 lbs (dry), 260 lbs (shipping)

Size ............................................15"w x 32"h x 34"d

For Use with Torch

Preﬁ x Numbers .........................210, 211, 212, 213, 225, 226

SUPPORT EQUIPMENT REQUIRED

Regulated Gas Supply and 6' Gas Hose. Water Source and Hose Capable of Providing a Minimum of 1 qt/min. at 45

p.s.i. when using water cooled torches.

Machine Location

The unit should be placed in a location where it can be protected from damage. For the longest unit life and best efﬁ ciency, avoid locations exposed to dust, corrosive fumes, high ambient temperatures or high humidity. Moisture and dirt on components can cause corrosion and/or shorting of circuits.

Adequate air circulation is needed at all times in order to prevent overheating and possible damage to internal parts. Maintain at least 12 inches of free air space on all sides of unit.

An eye bolt and mounting hole is provided for lifting/unpacking purposes. Do not have the gas cylinder or any other equipment mounted to this unit when using the lifting eye bolt. Do not suspend this unit overhead.

Input Power Connections

This welding power supply is designed to be operated from single-phase 208, 230, 416 or 480 VAC 60 Hz input power and is provided with Voltage Links for converting power requirements in the ﬁ eld.. Consult your local electrical utility if there are any questions about the type of electrical system at the installation site, or how proper connections to the welding machine have to be made.

CobraMig 260 Owner's Manual - Page 1

WARNING

A fused line disconnect switch should be installed in the

input circuit to the welding machine. This would ensure a complete

removal of all electrical power when performing service.

Before connecting input power cord verify input power requirements by checking data plate on rear of unit. Do not connect if your input power voltage is different from the voltage indicated on the input speciﬁ cation panel.

Turn off all power at the disconnect. Remove the right lower panel, as viewed from front, and locate power block

at rear of unit. Determine input Voltage and MOVE both Voltage Links to match INPUT

VOLTAGE on BOTH Terminal blocks "TB1" and "TB2", these need to be set the same or damage WILL occur to the unit.

Voltage Link

- - - IMPORTANT - - -

This unit has low and high power terminal blocks (TB1 & TB2)

that must have the SAME jumper conﬁ guration.

Put BOTH Voltage Links to same terminal block screws.

SEE SAMPLE HOOK UP DIAGRAM BELOW

FOR EXAMPLE OF VOLTAGE LINK PLACEMENT.

CobraMig 260 Owner's Manual - Page 2

Route input cable through strain relief and connect to power block as shown in the diagram following. Tighten strain relief and replace side panel with all hardware removed.

Machine Grounding

Before starting the installation, check with the local power company if there is any question about whether your power supply is adequate for the voltage, amperes, phase, and frequency speciﬁ ed on the welder nameplate. Also, be sure the plannted installation will meet the U.S. National Electrical Code and local code requirements. This welder may be operated from a single phase line or from one phase of a two or three phase line.

The CobraMig 260 is supplied connected for 480 Volt input. If the welder is to be operated on another voltage, it must be reconnected according to the instrucitons.

WARNING:

Make certain that the input power is electrically disconnected before removing the

screw on the reconnect panel access cover.

A green wire in the input cable connects this contact to the frame of the welder. This ensures proper grounding of the welder frame when the welder

plug is inserted into the receptacle.

Welding Torch Connections

Work Cable

Connect a work lead of sufﬁ cient size and length (see table below) between the proper output stud on the power source and the work. Be sure the connection to the work makes tight metal to metal electrical contact. Poor work lead connections can result in poor arc initiation, poor weld results and activation of the ground lead protector.

Work Lead Lengths Current 60% Up to 50ft. 10-100ft.

Duty Cycle (15.2m) (15.2-30.4m) 300A 0 (53mm) 0 (67mm)

400A 00 (67mm) 00 (85mm) 500A 00 (67mm) 00 (85mm) 600A 000 (85mm) 000 (107mm)

Control Cable

The 7-Pin “W” Clocked connector screws onto the mating receptacle on the front panel of the wire feeder. This provides all electrical signals (motor voltage, potentiometer control & trigger) to and from the feeder to the torch.

CobraMig 260 Owner's Manual - Page 3

Wire Conduit Inlet

Front panel access to attach conduit to front of slave motor assembly.

Power Cable Inlet

Front panel access to attach power cable (air or water) to top of power block.

Gas Inlet

Front panel access to attach gas hose to bottom ﬁ tting of power block.

Water Inlet (For Water Cooled Torches)

Front panel access to connect the water hose to the middle ﬁ tting on the power block.

Shielding Gas Connection

Remove the screws from the left hinged door, as viewed from the front, and open door.

Route the gas hose from the regulator/ﬂ owmeter through the grommet on the back panel and into the 5/8-18 R.H. ﬁ tting on the power block.

DANGER

Welding gases can cause serious injury or death.

Read manufacturer’s instructions before installing, using,

or servicing the regulator, gas hose, or gas cylinder.

Do not touch cylinder with electrode. Keep cylinder away from all electrical circuits. Keep gas cylinder secured so that it cannot move.

CobraMig 260 Owner's Manual - Page 4

Coolant Connection (Water Cooled Torches Only)

Connect the water return line from the recirculator through the grommet on the rear panel and into the 5/8" - 18 L.H. thread on the power block. The water “IN” hose connects directly to the torch water “IN” ﬁ tting; it does not pass through the power supply.

Wire Threading Procedue

Wire Spool Installation

Release latches, and open right side door of cabinet. Remove spool retainer nut from spindle hub. Raise wire retainer bar to latched position. Install wire spool onto spindle hub so that wire feeds from bottom of spool

towards slave motor. Make sure that the hole in the spool aligns with pin on spindle hub. The white dot on the end of the spindle hub will aid in this alignment.

Replace the spool retainer nut. Lower the wire retainer bar onto the spool.

Wire Spool Drag Setting

NOTE:

Standard factory setting of the Spindle Tension Knob is set for All Other Wires.

There are two visible position settings for this Knob, IN - All Other Wires (Fig. 1) and, OUT - .030/.035 Al Only (Fig. 2). The Spindle Tension Knob must be set to match the Wire Size Selector Switch on the Cobramatic® front panel.

To change this setting, it is easier done without the spool of wire on the spindle. Remove the wire spool retainer and re-install it reversed back onto the Spindle Tension Knob (Fig. 3). In the “Tool Mode”, the square shaped end of the retainer ﬁ ts onto the Knob. Grab the retainer and turn in the COUNTER-CLOCKWISE direction until it stops. The Knob is now set to the OUT position (.030/.035 AL Only).

IN - All other wires

Figure 1

OUT - .030/.035 Aluminum ONLY

Figure 2

Wire Spool Retainer In "Tool Mode";

used to change spindle drag.

Figure 3

To reset the Knob back to the factory setting of All Other Wires, use the retainer as described above, and turn in the CLOCKWISE direction until it stops. The Knob is now set to the IN position. Turning the retainer and Knob in this direction may require more effort, since turning CLOCKWISE is working against a spring.

Load wire spool onto spindle according to the previous instructions. Replace the spool retainer nut.

CobraMig 260 Owner's Manual - Page 5

Lower the wire retainer bar onto the spool.

Threading Procedure

Place wire size selector switch on front panel to the correct position for the wire being used.

Loosen end of wire from spool and cut off any kinked or bent portions. Unreel and straighten out ﬁ rst 6” to 8” of wire. Raise wire type lever to center position. Route wire into inlet guide, along drive roll groove, and into wire conduit. Flip wire type lever to show type of wire being used: ALUM or STEEL. Tighten the torch pressure adjusting knob so the wire will be picked up and

fed through the contact tip. Proper tension is achieved when wire does not slip if a small amount of pressure is added to the wire as it exits the tip.

Wire Retainer Bar

The design of the patented Cobramatic® Wire Retainer Bar performs two very important and very basic functions of the wire feeder: a) spool drag tension, and b) wire maintenance on the spool.

The spool drag tension is set by lowering the wire retainer bar onto the wire inside of the spool. The spring tension of the wire retainer bar applies enough pressure on the spool so that when the torch trigger is released, engaging the brake pall, the spool does not overrun kicking wire off the spool.

Wire maintenance on the spool is performed by the applied pressure of the wire retainer bar spread across the coiled wire on the spool. The replaceable pad (P/N 437-0255) of the wire retainer bar is designed to hold the wire on the spool, maintaining the smooth layering of the wire and keeping it from jumping off, and possibly, electrically shorting to the cabinet chassis.

Section B Operation

General Description

The CobraMig 260 is a constant voltage (CV) DC welding power supply with a built-in Cobramatic wire feeder which operates on the same basic principles as all other Cobramatics. The 115VAC slave motor in the feeder side runs at a fast, constant speed, but has very low torque. It is always trying to feed more wire than the torch motor wants, and when the torch motor gets all it wants, it slows the slave motor to the speed that the torch is running. Because of the low torque produced by the slave motor, a brake system is used to prevent wire overrun rather than tension. The drag adjustment in the spindle is used to keep the wire slightly taut, so it will not unspool while feeding wire. The high torque 24VDC torch pull motor is controlled by a solid state speed control, located on the main board, and the potentiometer located on the torch.

The lower portion of the unit houses the power supply components. Power supply controls include a range switch and a variable voltage control.

Controls and Settings

ON/OFF SWITCH

Placing the switch in the “ON” position energizes the power supply and places the unit in the ready-to-weld status. The power indicator light should be on at this time.

CobraMig 260 Owner's Manual - Page 6

WELD VOLTAGE

The weld voltage knob adjusts the power supply output voltage. It is inﬁ nitely variable between the ranges. The scale surrounding the WELD voltage control is a relative scale only; it does not represent actual voltage.

RANGE SWITCH

The “LO” range provides from 12 to 22 volts and the “HI” range provides from 22 to 32 volts.

POLARITY JUMPER

The polarity jumper allows for easy reversal of the electrode polarity. For Reverse polarity (DCRP) plug jumper into the plus (+) connector below jumper plug. For Straight polarity (DCSP) plug jumper into minus(-) connector below jumper plug. The work cable plugs into whichever connector is not used for the polarity jumper.

COBRAMATIC CONTROLS

ON/OFF SWITCH

Placing the switch in the “ON” position energizes the feeder circuitry and the power indicator light.

WIRE SIZE SELECTOR SWITCH

The wire size selector switch changes the torque of the slave motor for the wire you are using. When in the ".030-.035" aluminum only position, the slave motor produces approximately 2 lbs. inches and approximately 3 lbs. inches when in the "all other wires" position.

NOTE:

Operating the cabinet with the switch in the wrong position

will cause wire feed difﬁ culties.

POSA START CONTROLS

The Posa Start Control selects a Run-in Speed which is slower than the actual welding speed. After arc initiation, the wire feed speed control is transfered to the potentiometer in the torch handle. The scale surrounding the Run-in Speed Control is a relative scale only; it does not represent actual inches per minute, but a percentage of the speed dialed by the torch potentiometer.

REMOTE VOLTAGE (See Optional Kits)

This option enables the weld voltage control to be adjusted from a remote hand pendant.

TIMER KIT (See Optional Kits)

This option provides Spot Welding or Stitch Welding operation from the Cobramig 260. In the Spot Mode, timing can be adjusted for a welding time of .5 to 4 seconds and a Burnback time of 0 to .25 seconds. In the Stitch Mode, the unit can be commanded to "Turn On" from .5 to 4 seconds and "Turn Off" from .25 to 1 second.

DIGITAL VOLT/AMP METER (See Optional Kits)

The LCD meter provides an alternating display of Volts and Amps during and after welding for up to 1 minute using a built-in memory.

GAS CONTROL/TRIGGER LATCH (See Optional Kits)

The Gas Purge/Trigger Latch Kit is a dual function kit. The kit includes an easy to install interface control PC board, a 24VAC solenoid for pre and post purge control, a modiﬁ ed valve stem for the welding torch and, a front panel switch for activating the Trigger Latch mechanism.

The gas control times have been preset to 0.5 seconds pre-purge and 1.0 seconds post-purge. This offers an optimum amount of inert gas shielding prior to striking the arc and after the arc has been extinguished.

CobraMig 260 Owner's Manual - Page 7

The Trigger Latch mechanism gives the operator the ﬂ exibility of normal trigger operation (pull trigger to weld - release trigger to stop). This also offers the comfort of latched trigger operation (pull trigger once to latch and weld - pull trigger again to unlatch and stop).

POSA START OPERATING PROCEDURE

General

The Posa Start Run-in Speed Control, located on the front panel, provides adjustment for slow wire run-in. Once the arc has been established, the wire feed speed is automatically changed from the slow run-in speed to the welding speed set on the torch potentiometer. This slow run in speed helps to reduce “burn-backs” and “push-back” during arc start.

Posa Start Operation

Turn the Cobramatic to the “ON” position and the Posa Start to the “OFF” position.

Adjust power source to desired voltage for your weld condition. Depress gun trigger and adjust wire feed speed at gun to match voltage

setting. If approximate wire feed is not known, it is better to start with excess wire feed rather than too little, in order to prevent a “burn-back”.

Turn the Posa Start switch to the “ON” position. Press torch trigger and, using Run-in Speed Control, adjust wire feed rate to approximately 10% of the welding wire speed.

Strike an arc, and adjust wire feed rate at gun until correct condition is achieved.

CobraMig 260 Owner's Manual - Page 8

PROCESS SETTINGS

The following table is provided as a guide to assist you in setting up for standard welding processes. Please be aware that there are many variables associated with welding and conditions can change from day to day due to any number of external inﬂ uences.

MK Products' Customer Service Department is ready to assist you should you need help setting up your equipment in the ﬁ eld. Please be aware that we do not specialize in process parameter problems, but are willing to share our resources if it might help you achieve better quality welds.

MK Products reserves the right to change any settings associated with this welding guide, you may request the most up to date guide by calling our Customer Service department during normal working hours.

To use chart, locate material, thickness and wire diameter. Then read across for values to use, "REF" is the value dialed on the "Weld V oltage" knob on the front panel, this is only a reference value.

CobraMig 260 Owner's Manual - Page 9

Sample Setup - Aluminum

The procedure described below is designed to help you familiarize yourself with this equipment and also provide you with a known procedure so that you may perform a successful weld. Although these conditions may not be the exact ones needed for your speciﬁ c application, it will provide an example of the proper use and operation of this equipment.

MATERIALS NEEDED:

1 ea CobraMig 260 system with torch of your choice 1 ea #6 Gas Cup (3/8") 10 ea Contact Tips .044 (621-0001 spray arc) 1 ea Spool of clean .035 4043 Wire 1 ea Cylinder of Argon gas w/Regulator-Flowmeter and Hose 1 ea Stainless Steel Wire Brush 20 ea Weld coupons (2 X 6 X 1/8") 6061T-6 Aluminum

PROCEDURE:

Machine Set-up

Hook-up the CobraMig 260 according to installation instructions in owners manual.

Install wire onto spindle and thread wire through torch according to wire threading procedure.

Make sure "Wire Type" switch is in the "030-035 ALUM" position. Press gun trigger and set gas ﬂ ow to 25cfh. Set the “VOLTAGE” control on front panel to 8.4 and the “RANGE” switch

to Lo. Turn the “POSA START” to the off position. Place the “POLARITY JUMPER” in the positive (+) connector and the ground

clamp in the negative connector. Press the gun trigger for six (6) seconds. Adjust the wire feed speed until 32

inches of wire is measured in 6 seconds; this equals 320 ipm. Using the S/S brush, brush two weld coupons until the oxide is removed.

Position Material and Tack Weld

Position the coupons on the work table to form a ‘T’ ﬁ llet. Place the gas cup near the work piece and tack weld one end. Remember to

provide pre-purge before each weld by cracking the torch trigger and holding it for a few seconds before fully pressing the trigger. This will reduce built-up pressure and aid in arc starting.

Tack weld the other end.

Deposit Weld

Securely clamp the workpiece to the table so that you have a clear view of the arc, weld puddle, and unwelded portion of the joint at all times.

Welding is done from right to left for a right handed operator and from left to right for a left handed operator (known as Push or Forehand). The torch

CobraMig 260 Owner's Manual - Page 10

should bisect the 90 degree angle made by the joint and a push angle of from 10 to 15 degrees in the direction of travel is used.

Strike an arc and move the torch progressively along the joint at a smooth steady rate. Most operators, unfamiliar with aluminum, tend to move too slow and consequently overheat the plate. A travel rate of 25 to 35 ipm should be used.

The arc should sound smooth and the weld bead should be bright and shiny. If spatter occurs and the arc sounds like a short arc condition, decrease the wire feed speed or, if the weld looks cold, increase the voltage until a smooth spray transfer is achieved.

The above condition provides 20 volts and 112 amps. If exact volts and amps are

required, purchase meter kit P/N 005-0585.

CobraMig 260 Owner's Manual - Page 11

Sample Setup - Stainless

MATERIALS NEEDED:

1 ea CobraMig 260 system with torch of your choice 1 ea #6 Gas Cup (3/8") 10 ea Contact Tips .040 (621-0077 short arc) 1 ea Spool of clean .035 stainless wire (E308L-SI) 1 ea Cylinder of 90HE/7.5AR/2.5CO2 gas w/Regulator-Flowmeter and Hose 20 ea Weld coupons (2 X 6 X 16 gauge) stainless steel

PROCEDURE:

Machine Set-up

Hook-up the CobraMig 260 according to installation instructions in owners manual.

Install wire onto spindle and thread wire through torch according to wire threading procedure.

Make sure "Wire Type" switch is in the "All Others" position. Press gun trigger and set gas ﬂ ow to 25cfh. Set the “VOLTAGE” control on front panel to 5 and the “RANGE” switch to

Lo. Turn the “POSA START” to the off position. Place the “POLARITY JUMPER” in the positive (+) connector and the ground

clamp in the negative connector. Press the gun trigger for six (6) seconds. Adjust the wire feed speed until 8

inches of wire is measured in 6 seconds; this equals 80 ipm.

Position Material and Tack Weld

Position the coupons on the work table to form a ‘T’ ﬁ llet. Place the gas cup near the work piece and tack weld one end. Remember to

provide pre-purge before each weld by cracking the torch trigger and holding it for a few seconds before fully pressing the trigger. This will reduce built-up pressure and aid in arc starting.

Tack weld the other end.

Deposit Weld

Securely clamp the workpiece to the table so that you have a clear view of the arc, weld puddle, and unwelded portion of the joint at all times.

Welding is done from left to right for a right handed operator and from right to left for a left handed operator (known as Drag or Backhand). The torch

CobraMig 260 Owner's Manual - Page 12

should bisect the 90 degree angle made by the joint and a drag angle of from 10 to 15 degrees is used.

Strike an arc and move the torch progressively along the joint at a smooth steady rate. A travel rate of 20 to 25 ipm should be used.

The arc should sound smooth and steady. If spatter occurs and the arc pops reduce the wire feed speed until the arc smooths out.

The above condition provides 20 volts and 40 amps. If exact volts and amps are

required, purchase meter kit P/N 005-0585.

CobraMig 260 Owner's Manual - Page 13

Sample Setup - Steel

MATERIALS NEEDED:

1 ea CobraMig 260 system with torch of your choice

1 ea #6 Gas Cup (3/8") 10 ea Contact Tips .040 (621-0077 short arc) 1 ea Spool of clean .035 steel wire (E70-S6) 1 ea Cylinder of 75Argon/25CO2 gas w/Regulator-Flowmeter and Hose

20 ea Weld coupons (2 X 6 X 16 gauge) mild steel

PROCEDURE:

Machine Set-up

Hook-up the CobraMig 260 according to installation instructions in owners manual.

Install wire onto spindle and thread wire through torch according to wire threading procedure.

Make sure "Wire Type" switch is in the "All Others" position. Press gun trigger and set gas ﬂ ow to 25cfh. Set the “VOLTAGE” control on front panel to 5.8 and the “RANGE” switch

to Lo. Turn the “POSA START” to the off position. Place the “POLARITY JUMPER” in the positive (+) connector and the ground

clamp in the negative connector. Press the gun trigger for six (6) seconds. Adjust the wire feed speed until 13

inches of wire is measured in 6 seconds; this equals 130 ipm.

Position Material and Tack Weld

Position the coupons on the work table to form a ‘T’ ﬁ llet. Place the gas cup near the work piece and tack weld one end. Remember to

provide pre-purge before each weld by cracking the torch trigger and holding it for a few seconds before fully pressing the trigger. This will reduce built-up pressure and aid in arc starting.

Tack weld the other end.

Deposit Weld

Securely clamp the workpiece to the table so that you have a clear view of the arc, weld puddle, and unwelded portion of the joint at all times.

Welding is done from left to right for a right handed operator and from right to left for a left handed operator (known as Drag or Backhand). The torch

CobraMig 260 Owner's Manual - Page 14

should bisect the 90 degree angle made by the joint and a drag angle of from 10 to 15 degrees is used.

3. Strike an arc and move the torch progressively along the joint at a smooth steady rate. A travel rate of 25 to 35 ipm should be used.

4. The arc should sound smooth and steady. If spatter occurs and the arc pops reduce the wire feed speed until the arc smooths out.

The above condition provides 16.5 volts and 89 amps. If exact volts and amps are

required, purchase meter kit P/N 005-0585.

CobraMig 260 Owner's Manual - Page 15

Section C Accessories

Optional Kits

Remote Voltage Kit ...........................................................................005-0584

Enables the power supply to be controlled from 25' pendant.

LCD Meter Kit ...................................................................................005-0354

Digital Volt and AMp meters with memory feature to hold and alternately display volts and amps for 1 minute after welding.

Timer Kit ...........................................................................................005-0586

Add on panel includes spot timer and stitch weld option.

Torch Hanger Kit ...............................................................................005-0169

Allows you to hang torch on side of power supply. Easilly hooks on and off.

Gas Control/Trigger Latch Kit ...........................................................005-0674

Adds Pre/Post Purge and Trigger function options.

Water Flow Kit ..................................................................................005-0253

Monitors water pressure in torch. No water - no arc.

Section D Maintenance

Routine Maintenance

Maintenance of the torch will normally consist of a general cleaning of the wire guide system, including tubes, drive rolls, and conduits at regular intervals.

Remove spatter build-up from inside of nozzles with a hardwood stick. The only parts on the Cobramatic system that are subject to normal wear are

the conduit, contact tips, gas cups, front body liners, wire guides, drive and idler rolls. A supply of these parts should be maintained on hand.

Power Supply

Periodically inspect all cables and hoses for damage or breaks in the insulation jacket, particularly at the plugs or ends. Repair or replace cables or hoses as necessary.

Remove grease and dirt from components and remove moisture from electrical parts and cables.

Be sure that all connections are clean and tight.

WARNING:

ELECTRIC SHOCK can kill.

Shut-off disconnect and unplug unit before cleaning unit.

Every six months blow out or vacuum dust and dirt from the internal components of the power supply. Remove the side panels and use a clean, dry air stream or vacuum suction for the cleaning operation. If repairs do become necessary, any part can easily be replaced by a qualiﬁ ed shop maintenance man.

Your CobraMig 260 is designed to provide years of reliable service. Normal wear and component failure may require occasional service. The number of units in operation and the importance of minimal “down time” will determine to what extent spare parts should be stocked on hand.

CobraMig 260 Owner's Manual - Page 16

Testing the Feeder

Relay K2 Operation

When the torch trigger is pressed, 24V AC is sent to the coil of relay K2. When K2 is energized, 115VAC is sent to the slave motor, spool brake, and the 115VAC contactor. Relay K2 is also responsible for sending 24VAC to the speed control circuit and shorting the torch motor leads together when the trigger is released for the dynamic braking system. K2 also provides the closing contactor signal.

Testing the 115 VAC Circuits

The 115 VAC circuit is protected by fuse F3. If F3 continually blows, remove J4 (Brake Solenoid), J7 (slave motor) and J5-3,4 (115 V the P.C. Board. Replace fuse, and retrigger system. If fuse does not blow; isolate the problem by plugging in J4, J7, and J5-3,4 one at a time until the fuse blows.

AC Contactor) from

Testing the Torch

Motor Check

Remove the amphenol connector from the cabinet. Using the torch amphenol, check the resistance across pins “A” and

“B”(motor leads). The resistance across the motor should be between 5-10 ohms.

If an open circuit or short exist, check the motor leads and motor independently.

Testing the Potentiometer - “W” Clocked

Using the torch amphenol, check the resistance across pin “D” (wiper) and pin “C”. The resistance should vary from 0 - 5K ohms.

Check the resistance across pin “D” (wiper) and pin “G”. The resistance should vary from 5K - 0 ohms.

Testing the Micro Switch

Using the torch amphenol, check for continuity across pins “E” and “F” when the trigger is pressed.

Testing the Speed Control

NOTE:

The torch should be tested ﬁ rst and the torch panel amphenol must be

connected to the Cobramatic I to perform this test.

Place a voltmeter across diode D10 and press torch trigger. A reading of 0 - 24VDC should be observed, as the potentiometer varied.

Cobramtatic Main Board

CobraMig 260 Owner's Manual - Page 17

Section E TROUBLESHOOTING

WARNING

Turn off input power switch, unplug primary

power cord and wait 5 minutes before performing

any service to this equipment. This will ensure

that all storage capacitors have discharged

to a relatively safe level.

The following pages detail the trouble shooting section of this manual, please read carefully and use caution when performing service on any electrical equipment. All service is to be performed by a qualiﬁ ed service technician.

Before calling for customer service, please go over the trouble shooting page to help solve your equipment problem. If the ﬂ ow charts can not help you, please have the following information on hand before calling our service personnel:

1. Company name

2. Your name

3. Your phone number

4. Power supply Model No.

5. Primary power source

6. Symptoms of failure

7. Weld conditions

CobraMig 260 Owner's Manual - Page 18

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CobraMig 260 Owner's Manual - Page 19

FLOW CHART

SYMPTOM NO WIRE FEED AT TORCH, FEEDER NOT OPERATING

PROBLEM AREA COBRA I: MAIN BOARD, K2 RELAY

TORCH: MOTOR, CABLE, MICRO SWITCH, SLAVE MOTOR, BRAKE SOLENOID

START

YES

MICRO SWITCH, TRANSFORMER RELAY, OR K2 RELAY ON COBRA I MAIN BOARD IS DEFECTIVE OR LOOSE J2, J3 ON COBRA I PC BOARD

GO TO FLOW CHART #4 COBRA I MAIN BOARD, F1 AND F3 FUSES ARE OK BUT WIRE FEED AND TORCH NOT OPERATING

IS COBRA I MAIN

BOARD F1 FUSE OK?

YES

IS COBRA I MAIN

BOARD F3 FUSE OK?

MOTOR LEADS SHORTED OR TORCH MOTOR IS DEFECTIVE

GO TO FLOW CHART # 3 COBRA I MAIN BOARD, F1 FUSE IS BLOWN

BRAKE SOLENOID OR

SLAVE MOTOR DEFECTIVE

GO TO FLOW CHART # 2 COBRA I MAIN BOARD, F3 FUSE IS BLOWN

TROUBLE:

No wire feed at torch, feeder not operating, ie. No slave motor or brake solenoid action.

CAUSE:

(F3) 2 amp Fuse on Main P.C. board on wire feeder. (F1) 4 amp Fuse on Main P.C. board on wire feeder. Micro Switch defective / Not being activated. Broken electrical cable. Transformer relay, Relay K2 inoperative. Loose J2, J3, Cobra I Main P.C. board connections.

CobraMig 260 Owner's Manual - Page 20

FLOW CHART

SYMPTOM F3 FUSE ON COBRA I IS BLOWN WHEN TORCH IS TRIGGERED

PROBLEM AREA COBRA: MAIN BOARD, SLAVE MOTOR OR BRAKE SOLENOID

NOTE :The 115VAC on Cobra I Main P.C. Board is protected by

Fuse F3. If F3 continually blows, unplug J4 (Brake Solenoid), J7 (Slave Motor) from the P.C. Board. Replace the fuse and retrigger. If fuse does not blow, isolate the problem by plugging in J4 and J7 one at a time until the fuse blows.

START

F3 FUSE BLOWN

COBRA MAIN BOARD

UNPLUG CONNECTORS J4, BRAKE SOLENOID J7, SLAVE MOTOR

RE-TRIGGER TORCH

GO TO FLOW CHART # 3 COBRA MAIN BOARD, F1 FUSE IS BLOWN

IS COBRA MAIN BOARD

F3 FUSE OK ?

YES

Resistance Check : a) Slave Motor J7-6 to J7-1 = 150 ohm J7-4 to J7-2 = 150 ohm b) Brake Solenoid J4-1 to J4-2 = 80 ohm

YES

PLUG IN J4

RE-TRIGGER TORCH

IS COBRA I MAIN BOARD

F3 FUSE OK ?

YES

BRAKE SOLENOID IS OK

SLAVE MOTOR IS OK

PLUG IN J7

RE-TRIGGER TORCH

IS COBRA MAIN BOARD

F3 FUSE OK ?

CobraMig 260 Owner's Manual - Page 21

SLAVE MOTOR IS

DEFECTIVE

BRAKE SOLENOID IS

DEFECTIVE

FLOW CHART

SYMPTOM COBRA: MAIN BOARD, F1 FUSE IS BLOWN

PROBLEM AREA COBRA: MAIN BOARD OR TORCH MOTOR

START

IS COBRA MAIN

YES

GO TO FLOW CHART #4 COBRA I MAIN BOARD, F1 AND F3 ARE OK, BUT WIRE FEED AND TORCH NOT OPERATIVE

BOARD F1 FUSE OK?

UNPLUG TORCH AMPHENOL FROM COBRA FRONT PANEL

JUMPER "E" AND "F" ON EITHER

OF THE COBRA FRONT PANEL

AMPHENOL CONNECTORS

COBRA I MAIN P.C. BOARD IS

DEFECTIVE

IS COBRA MAIN

BOARD F1 FUSE OK?

YES

MOTOR LEADS ARE SHORTED

OR MOTOR IS DEFECTIVE

NOTE : MOTOR CHECK

a. Remove the amphenol connector from the cabinet.

b. Using an OHM meter, check the resistance across pins "A" and "B" (motor leads) on torch amphenol. The resistance across the motor should be between 5 and 10 ohms. c. If an open circuit or short circuit condition exists, check the motor leads and motor independently.

CobraMig 260 Owner's Manual - Page 22

FLOW CHART

SYMPTOM COBRA MAIN BOARD, F1 AND F3 FUSES ARE OK

BUT NO WIRE FEED AT TORCH AND FEEDER NOT OPERATING

PROBLEM AREA K2 RELAY ON COBRA I MAIN BOARD,

TRANSFORMER RELAY OR TORCH MOUNTED MICRO SWITCH

START

GO TO FLOW CHART #3 COBRA I MAIN BOARD, F1 FUSE IS BLOWN

COBRA I MAIN P.C. BOARD, K2 RELAY

IS INOPERATIVE OR LOOSE J2, J3

CONNECTORS ON MAIN BOARD

IS COBRA MAIN

BOARD F1 FUSE OK?

TRANSFORMER RELAY IS

DEFECTIVE OR CABLE

ASSEMBLY MISWIRED (SEE

NOTE)

NO YES

YES

IS THE COBRA FRONT

L.E.D. POWER LIGHT ON ?

IS WIRE FEEDING OK ?

YES

UNPLUG TORCH AMPHENOL FROM COBRA FRONT PANEL

JUMPER "E" AND "F" ON EITHER

OF THE COBRA FRONT PANEL

AMPHENOL CONNECTORS

MICRO SWITCH IS DEFECTIVE

NOTE :

When the Cobra I front panel power switch is on, 115VAC is sent to the coil of Transformer Relay and 27 VAC is sent to Cobra I main board. When the torch is triggered, then K2 on Cobra I main board is energized. This action transfer 115 VAC to the slave motor, brake solenoid and controlled voltage to the torch motor.

TRANSFORMER RELAY VOLTAGES : When torch trigger is depressed 115 VAC COM (White), Pin A to 115 VAC HOT (Neu), Pin B = 115 VAC 27 VAC COM (Brown), Pin 7 to 27 VAC HOT (Orange), Pin 9 = 27 VAC 27 VAC COM (Yellow), Pin 4 to 27 VAC HOT (Blue), Pin 6 = 27 VAC

CobraMig 260 Owner's Manual - Page 23

FLOW CHART

SYMPTOM NO WIRE FEED AT TORCH, FEEDER OPERATING PROPERLY

PROBLEM AREA COBRA MAIN BOARD, TORCH POT OR TORCH MOTOR

START

IS COBRA MAIN

NO YES

BOARD F1 FUSE OK?

GO TO FLOW CHART #3 COBRA I MAIN BOARD, F1 FUSE IS BLOWN

YES

SYSTEM OK

CABLE IS BROKEN

TORCH POT IS DEFECTIVE

CABLE IS BROKEN

TORCH MOTOR IS DEFECTIVE

CHECK FOR LOOSE CABLES

AT COBRA FRONT PANEL AND

MAIN P.C. BOARD

IS THE TORCH WORKING

OK NOW ?

WAS METER READING OK ?

CHECK TORCH POT

(SEE NOTE 1 BELOW)

YES

CHECK TORCH MOTOR

(SEE NOTE 2 BELOW)

YES

COBRA MAIN BOARD

IS DEFECTIVE

NOTES:

1. Check TORCH POT at plug connector a. Testing the poteniometer - "W"

Clocked. - Using Ohm Meter to check resistance across pin "D" (wiper) and pin "C" of Torch plug. Should vary from 0 to

5k ohm while turning pot. - Using Ohm Meter to check resistance across pin "D" (wiper) and pin "G" of Torch plug. Should vary from 0 to 5k ohm while turning pot.

b. Testing the poteniometer - "S" Clocked. - Using Ohm Meter to

check resistance across pin "D" (wiper) and pin "C" of Torch plug. Should vary from 0 to 5k ohm while turning pot.- Using Ohm Meter to check resistance across pin "D" (wiper) and pin "A" of Torch plug. Should vary from 0 to 5k ohm while turning pot.

2. Check TORCH MOTOR a. Unplug the Torch from the front panel.

b. Using the Ohm Meter, Check the

resistance across pin "A" and pin "B" (motor leads) of Torch plug. The resistance should be about 5 to 10 ohms. c. If open of short circuit exists, then check motor leads and motor for additional problems.

CobraMig 260 Owner's Manual - Page 24

FLOW CHART

SYMPTOM WIRE FEEDS AT ONE SPEED ONLY, NO CONTROL BY POT SETTING ON

TORCH

PROBLEM AREA TORCH MOTOR POTENIOMETER OR CABLE OR COBRA I MAIN BOARD

START

UNPLUG TORCH AMPHENOL

FROM COBRA FRONT PANEL

CHECK THE "W' CLOCKED /

"S" CLOCKED POTENIOMETER

PER NOTE BELOW

TORCH POT IS DEFECTIVE

TORCH CABLE IS DEFECTIVE

NOTES:

1. Check TORCH POT at plug connector

a. Testing the poteniometer - "W" Clocked. - Using Ohm Meter to check resistance across pin "D" (wiper) and

pin "C" of Torch plug. Should vary from 0 to 5k ohm while turning pot. - Using Ohm Meter to check resistance across pin "D" (wiper) and pin "G" of Torch plug.

Should vary from 0 to 5k ohm while turning pot.

WAS METER READING OK ?

YES

COBRA MAIN P.C. BOARD

IS DEFECTIVE

b. Testing the poteniometer - "S" Clocked. - Using Ohm Meter to check resistance across pin "D" (wiper) and

pin "C" of Torch plug. Should vary from 0 to 5k ohm while turning pot. - Using Ohm Meter to check resistance across pin "D" (wiper) and pin "A" of Torch plug.

Should vary from 0 to 5k ohm while turning pot.

CobraMig 260 Owner's Manual - Page 25

FLOW CHART

SYMPTOM NO WELD OUTPUT, NO VOLTAGE CONTROL

PROBLEM AREA POWER SUPPL Y CONTROL (PSCB), THERMOST AT , TRIAC, CONT ACT OR SIGNAL,

PWR SWX BOARD

START

IS PSCB LED D7 ON ?

(DOES IT HAVE 12 VOLTS)

YES

PSCB IS DEFECTIVE

REPOSITION JUMPER

TO TP2 AND TP4

IS PSCB F1 FUSE OK ?

TRANSFORMER RELAY

IS DEFECTIVE OR NO AC

INPUT, CHECK

DISCONNECT FUSE

YES

JUMPER TP1 TO TP5 ON PSCB

PSCB IS DEFECTIVE

IS PSCB LED D12 ON ?

YES

REPOSITION JUMPER TO TP2

YES

K2 RELAY ON

COBRA I MAIN

BOARD DOES NOT

SEND CLOSING

CONTACT SIGNAL

OR TORCH SWITCH

IS DEFECTIVE

DOES OUTPUT VARY WHEN VOLTAGE KNOB IS TURNED

APPROX :LO 10 - 32VDC

YES

AND TP3

HI 29 - 40VDC

USING VOLTMETER, MEASURE WELD VOLTAGE

AT COBRA I MAIN BOARD J6-1(+) AND J6-2(-)

DOES OUTPUT VARY WHEN VOLTAGE

THERMOSTAT

TERMINALS LOOSE OR

THERMOSTAT IS

DEFECTIVE

(OPEN ALL THE TIME)

KNOB IS TURNED

APPROX :LO 10 - 32VDC

HI 29 - 40VDC

YES

PSCB IS DEFECTIVE

ADD SECOND JUMPER TO TP1

IS WELD OUTPUT AT MAXIMUM

AND TP5

(APPROX. 35 - 40VDC)

TRIAC IS DEFECTIVE

TRIAC RESISTANCE CHECK: Use meter in "Diode" mode.

Pin 3 to Pin 4 : 2.3 Pin 1 to Pin 2 : open

CobraMig 260 Owner's Manual - Page 26

FLOW CHART

SYMPTOM DISCONNECT FUSE BLOWS WHEN TORCH IS TRIGGERED

PROBLEM AREA POWER TRANSFORMER "T1", DIODES, CAPACITORS

START

TURN OFF ALL POWER

AND DISCONNECTS

USING AN OHM METER, MEASURE THE RESISTANCE AT J6-1 (WELD VOLTS) AND J6-2 (WORK GROUND) ON COBRA I MAIN

BOARD, READING SHOULD BE APPROX. 25 OHM

NO YES

DISCONNECT DIODES FROM POWER TRANSFORMER T1 : ANODE D1 FROM T1-6 ANODE D2 FROM T1-5

CAPACITORS SHORTED

IS READING OK ?

IS READING AT J6-1 AND J6-2

APPROX. 25 OHM NOW ?

SET OHM METER ON DIODE CHECK MODE

MEASURE DIODE RESISTANCE : PLACE (+) LEAD ON ANODE AND (-) LEAD ON HEATSINK READING SHOULD BE APPROX. 300 TO 800 OHMS PLACE (-) LEAD ON ANODE AND (+) LEAD ON HEATSINK READING SHOULD BE OPEN.

IS READING OK ?

POWER TRANSFORMER "T1"

IS DEFECTIVE

YES

DIODE IS DEFECTIVE

DIODE IS OK

CobraMig 260 Owner's Manual - Page 27

FLOW CHART

SYMPTOM POSA START NO WORKING PROPERLY

PROBLEM AREA CURRENT SENSOR, COBRA I MAIN BOARD, READ POSA START SECTION.

START

TO CHECK POSA START POT : REMOVE J2 ON COBRA I MAIN BOARD, TURN ON POSA START SWITCH USING OHM METER METER RESISTANCE AT J2-1 AND J2-2 RIBBON CABLE READING SHOULD VARY FROM 0 TO 100K OHM

POSA START POT OR POSA START SWITCH DEFECTIVE

CURRENT SENSOR IS DEFECTIVE

(CLOSED ALL THE TIME)

JUMPER J1-1 AND J1-2 ON COBRA 1 MAIN BOARD

IS READING OK ?

USING A VOLT METER, MEASURE THE WELD VOLTAGE

AT J6-2(-) AND J6-1(+) ON COBRA I MAIN BOARD SET POSA POT = 1/4 TURN ON SET TORCH POT = MAXIMUM (CW) TURN ON COBRAMIG 260 TRIGGER AND ADJUST WELD VOLTS TO APPROX 15V

YES

PLUG IN J2 REMOVE J1 ON COBRA I MAIN BOARD. USING OHM METER MEASURE RESISTANCE OF CURRENT SENSOR THE READING SHOULD BE OPEN

YES

NO YES

COBRA I MAIN BOARD

IS DEFECTIVE

DOES TORCH MOTOR SPEED

INCREASE WHEN JUMPER IS

ADDED?

CURRENT SENSOR IS DEFECTIVE

(OPEN ALL THE TIME)

CobraMig 260 Owner's Manual - Page 28

10 10

FLOW CHART

SYMPTOM NO WELD OUTPUT, REMOTE VOLTAGE POT INSTALLED

PROBLEM AREA JUMPER ON POWER SUPPLY CONTROL BOARD (PSCB) IN WRONG POSITION

REMOTE PENDANT IS DEFECTIVE

START

NO YES

GO TO TO FLOW CHART #7

DO YOU WANT TO USE PENDANT OR FRONT

PANEL

SET JUMPER ON BACK OF WELD

VOLTAGE CONTROL PANEL T O THE

PANEL POSITION

IS FRONT PANEL VOLTAGE

KNOB WORKING NOW ?

YES

IS REMOTE VOLTAGE KIT

(005-0584) INSTALLED ?

PANEL VOLTAGE CONTROL KNOB

PENDANT

SET JUMPER ON BACK OF WELD

VOLTAGE CONTROL PANEL TO THE REMOTE POSITION AND CHECK THAT THE PENDANT IS PLUGGED INTO THE

FRONT PANEL CONNECTOR

IS REMOTE VOLTAGE

PENDANT WORKING NOW ?

YES

GO TO FLOW CHART #7

READY TO WELDREADY TO WELD

NOTE : WHEN THE REMOTE VOLTAGE POT KIT IS INSTALLED AND THE JUMPER

IS IN THE REMOTE POSITION, YOU MAY ONLY USE THE REMOTE POT, THE FRONT PANEL VOLTAGE POT IS DISABLED UNTIL YOU MOVE THE JUMPER BACK TO FRONT PANEL POSITION.

CobraMig 260 Owner's Manual - Page 29

FLOW CHART

SYMPTOM CONTACTOR CLOSED, WIRE ALWAYS ENERGIZED

PROBLEM AREA POWER SUPPLY CONTROL BOARD, K2 RELAY MAIN BOARD, TRIAC

START

JUMP TP1 TO TP5

IS PSCB LED D12 ON?

PSCB IS DEFECTIVE

YES NO

IS THE WELDING

YES

VOLTAGE

CONTROLLABLE?

YES NO

YES

REMOVE JUMPER

FROM TP1:TP5

DISCONNECT J6 ON PSCB

CONTACTOR STILL CLOSED?

IS PSCB LED D7 ON?

NONO

PSCB IS DEFECTIVE

IS PSCB FUSE F1 OK?

DISCONNECT FUSE

USING OHMMETER,

CHECK FOR

CONTINUITY ACROSS

J6-3 AND J6-4 ON

MAIN PC BOARD

YES

TRANSFORMER

RELAY IS

DEFECTIVE OR NO

AC INPUT, CHECK

PSCB IS DEFECTIVE

YES NO

REPLACE TRIAC

DISCONNECT J5

ON THE PSCB

PSCB IS DEFECTIVE

IS THE WELDING

WIRE STILL

ENERGIZED?

PSCB IS DEFECTIVE

CobraMig 260 Owner's Manual - Page 30

CLOSED SIGNAL

RESEAT K2 RELAY

REPLACE IF

NECESSARY

YES

Section F Appendices Diagrams/Parts List

Main P.C. Board Connections ..............................................32

001-3850 Top Level ...........................................................33

003-2134 Power Supply Assembly ......................................34

003-1586 Multi-Tap Bracket Assembly .................................35

003-1584 Logic Transformer Assembly ................................36

003-2131 Wire Feeder Assembly ........................................37

003-2135 Front Panel Assembly .........................................38

003-2130 Back Panel Assembly ..........................................39

003-2132 Deck Assembly ...................................................40

003-1774 Heat Sink Assembly ............................................41

003-1714 Cap Bank Assembly ............................................42

003-1703 Control Panel Assembly .......................................43

003-2063 Cobramatic Power Block Assembly .......................44

003-2109 42 VAC Front Panel Assembly ..............................45

003-2061 Cobramatic Spindle Brake Assembly .....................46

003-2078 Slave Motor Assembly .........................................47

071-0321 Universal Input ...................................................48

071-0390 Universal Input with Options ...............................50

071-0370 Front Panel ........................................................51

071-0714 Power Supply Control Board ................................52

CobraMig 260 Owner's Manual - Page 31

STANDARD CONNECTIONS - MAIN PC BOARD

CobraMig 260 Owner's Manual - Page 32

001-3850

Multi-Tap CV 260

1 1 003-1744 Assy Gas Tank Chain CV-260

No. Qty. P/N Description

2 1 003-1853 Assy Top Cover CV-260

3 1 003-2131 Assy Wire Feeder CV-260

4 1 003-2134 Assy Power Supply CV-260

5 REF 031-0171 Test Procedure Final CV-260

6 REF 071-0389 Block Diagram CV-260

7 REF 071-0390 Block Diagram w/option CV-260

8 38 327-0115 Scr Hw S T/B #14 x 1/2 St

9 2 333-0043 Washer Flat #6

11 4 336-0039 Scr Pn P 10-32 x 3/8 ST

10 2 336-0005 Scr Pn Ph 6-32 x 3/8

12 2 336-0188 Scr Pn P 6-32 x 3/8 ST HI

13 1 341-0018 Nut Hx Plain #1/2-13UNC

14 1 405-0780 Tag Owner Man CV-260

15 1 405-0887 Decal Warning T13470

16 1 405-0951 Decal Serial Plat CV-260

17 2 436-0044 SS Fixed Door CV-260

18 1 445-0013 Bolt Eye 1/2 - 13UNC

19 1 843-0528 Cable GND Power 20FT CV-260

CobraMig 260 Owner's Manual - Page 33

003-2134a

Multi-Tap Power Supply Assembly

1 1 438-0030 Base Paint

No. Qty. P/N Description

2 1 431-3516 Axle Back Wheel

3 2 515-3693 Wheel 08.00

4 4 331-0080 Washer Flat 13/16x1.75

5 2 421-0410 Pin 03/32 x 1.25 LG

6 1 137-0084 Transformer Power

7 1 133-0007 Choke

8 7 329-0003 Scr Hex 1/4-20x3/4LG

9 7 333-0009 Washer Spring Lock 1/4

11 7 345-0051 Nut Hex Lock 1/4-20

10 7 331-0050 Washer Flat 1/4x5/8x1/16

12 5 329-0029 Scr Hex 5/16-18x3/4LG

13 5 331-0025 Washer Flat 5/16

14 2 515-3692 Caster

15 5 333-0010 Washer Spring 5/16

16 5 341-0012 Nut Hex 5/16-18

17 1 405-0801 Decal Power Input

18 1 405-0621 Decal Warning

19 1 405-0862 Decal Voltage

20 1 185-0073 Terminal Ground

21 1 329-0219 Scr Hex 10-24x1/2LG

22 1 345-0012 Nut Hex 10-24

23 1 003-1586 Assy Bracket

24 1 003-1774 Assy Heatsink

25 1 003-1706 Assy Fan Cooling

26 6 327-0115 Scr Sht Mtl #14 x 1/2 LG

27 4 333-0027 Washer LK Star-ln 1/4

28 1 003-1879 Assy Cap

29 1 844-0066 Cable Choke to Receptable

CobraMig 260 Owner's Manual - Page 34

003-1586

Multi-Tap Bracket Assembly

1 1 435-1515 Brackett, Multi-Tap

No. Qty. P/N Description

2 1 003-1584 Assy Xfmr Logic

3 1 159-3590 Switch, Power

4 2 1860075 Terminal Strip 9 Pos

5 1 405-0864 Label TB1

6 1 186-0069 Terminal Strip 2Pos

7 2 437-0207 Jumper, Capsulated

8 1 003-1772 Cable Power Supply

9 5 411-0193 Tie Wrap

11 4 335-0198 Scr Hp Fil 10-32x1/2

10 2.23ft 301-0081 Grommet, Edge Potect

12 8 331-0004 Washer Flat #10

13 4 333-0007 Washer Spring Lock #10

14 4 336-0195 Scr Hp Fil 8-32x3/4

15 4 331-0003 Washer Flat #8

16 1.02ft 845-0058 Wire Bga White

17 3.43ft 845-0289 Wire 1Bga White

18 6 185-0077 Ring Lug Scr #10 8ga

19 10 185-0516 Ring Lug Scr #1022-1 8ga

20 0.50ft 739-0007 Tubing Heat Shrink 3/8 ID1.00

21 4 336-0197 Scr Hp Fil 10-32x3/8

22 1 405-0869 Label TB2

23 1 124-0127 Var Rd 510V 110J 14mm

24 0.17ft 261-0019 Tubing Teﬂ on White 18Ga

CobraMig 260 Owner's Manual - Page 35

003-1584

Logic Transformer Assembly

1 1 137-0085 Logic Transformer

No. Qty. P/N Description

2 8 185-0003 Term Lug #8 Scr 22-18ga

3 2 185-0001 Term Slpon Fem .187 22-18ga

4 2 153-0910 Con Term Crimp Pin 0.09 #18ga

5 1 153-0909 Conn Housing 3 Pin

6 .50ft 261-0469 Tubing, Insulation 7/16 ID

7 2.67ft 261-0132 Tubing, Insulation 0.75 ID

CobraMig 260 Owner's Manual - Page 36

003-2131

Wire Feeder Assembly

1 1 003-1714 Assy Cap Blank

No. Qty. P/N Description

2 1 003-2130 Assy Back Panel CV-260

3 1 003-2132 Assy Deck CV-260

4 1 003-2135 Assy Front Panel

5 14 327-0115 Screw Sht Mtl #14-12 St T/B

6 1 328-0063 Screw Sch 1/4-20 x 1 3/4 Blk

7 1 328-0258 Screw Sch 1/4-20 x 3 1/2 Stl

8 2 345-0015 Nut Hex Lock 1/4-20 St

9 1 419-0089 Torsion Spring Restrainer

11 1 431-1608 Mandrel Catch

10 1 419-0090 Trosion Spring Catch

12 1 431-1609 Mandrel Restrainer

13 1 435-1584 Panel Restrainer CV-260

14 1 437-0242 Restrainer Wire

15 1 437-0243 Pad Restrainer

16 1 437-0255 Catch Restrainer

CobraMig 260 Owner's Manual - Page 37

003-2135a

Front Panel Assy.

1 1 436-0161 Silkscreen Front Panel

2 2 351-0089 Thread Insert, #10-32

3 12 351-0086 Thread Insert, #6-32

4 12 336-0005 Screw, Ph Fil, #6-32 x 3/8"

No. Qty. P/N Description

5 1 003-1703 Control Panel Assy

6 1 436-0093 Screened Cover, Meter Kit

7 1 436-0094 Screened Cover, Timer Kit

8 1 435-1588 Cover PCB CV-260

9 1 351-0745 Bushing, Snap 01.12

11 1 351-0748 Plug, Hole 01.12

10 1 003-1780 Pilot Lamp Assy

12 1 351-0101 Strain Relief, Cable

13 2 351-0752 Bushing, Snap 01.50

14 2 153-0754 Con, Rcp, Pnl, Dinese, 400A

15 1 844-0065 Polarity Cable

16 1 003-2110 Cobra Panel Assy.

17 2 351-0008 Plug, Hold 03/8

CobraMig 260 Owner's Manual - Page 38

No. Qty. P/N Description

1 1 438-0073 Paint Back panel CV-260 2 2 351-0089 Thread Insert #10-32 3 1 351-0100 Bushing Snap 02.0 Hole 4 1 435-1499 Bracket Gas Tank 5 4 327-0115 Scr Hex Sht Mtl #14-12 x 1/2" 6 1 411-0165 Strain Relief Cable

CobraMig 260 Owner's Manual - Page 39

Back Panel Assembly

003-2130

003-2132a

Deck Assembly

1 1 438-0072 Paint Deck CV-260

2 1 438-0070 Paint Mid-Plate Assy.

No. Qty. P/N Description

3 4 329-0002 Scr Hex 1/4-20 x 5/8

4 1 261-0510 Spool Insulator

5 1 003-2078 Assy Slave Motor 115V

6 4 333-0009 Washer Spring Loc 01/4 ID

7 1 438-0044 Paint Panel Access Triac CV-260

8 1 329-0208 Scr Hex 3/8 -16 x 1.0

9 0.50ft 261-0505 Trim Protection Edge

11 1 003-2146 Assy Spindle CB

10 1 003-0784 Assy Pawl Ratchet

12 6 351-0086 Insert Thread #6-32

13 4 331-0002 Washer Flat #6

14 1 003-0593 Assy Relay

15 12 333-0043 Washer Star-In #6

16 12 336-0005 Scr Ph Phl St #6-32 x 3/8

17 2 411-0186 Strap Cable

18 2 305-0042 Pop Rivet 1/8 Al.

19 1 003-2096 Assy Sol Brk 115V

20 3 336-0037 Scr Ph Phl St #6 x 1/4 T/B

21 1 419-0080 Spring Extension

22 6 342-0410 Spacer #6-32

23 1 003-1628 Assy Pcb main Cb 115V

24 1 405-0072 Decal Elec Connection

25 1 405-0929 Decal Main Pcb Connections

26 2 351-0752 Bushing Snap 01.50

27 5 327-0115 Scr Hex Sht Mtl #14 x 1/2

28 1 003-2063 Assy Power Block CB

29 1 261-0109 Insulator Power Block

30 1 435-1502 Bracket Power Block

31 2 332-0009 Washer Shoulder 01/4

32 2 331-0049 Washer Flat 01/4

33 2 329-0003 Scr Hex 1/4-20 x 3/4

34 1 405-0930 Decal Hose Connections

35 4 329-0405 Scr Hexwshrhd Hi-Perf 8-32 x 3/8

36 1 405-0886 Decal Warning T13297

37 1 405-0887 Decal Warning T13470

CobraMig 260 Owner's Manual - Page 40

003-1774C

Heat Sink Assembly

1 1 431-3102 Heat Sink

No. Qty. P/N Description

2 4 431-3861 Spacer

3 4 333-0027 Washer, X-Star 1/4

4 8 329-0004 Screw, HEx 1/4-20 x 7/8

5 1 125-0033 Triac 660V 75A

7 4 333-0023 Washer, X-Star #6

8 2 336-0006 Screw Ph Ril #6-32 x 1/2

11 1 329-0053 Screw, Hex 3/8-16 x 1/2

10 1 333-0011 Washer, Spring Lock 3/8

12 1 844-0061 Cable, Triac Assy.

13 1 170-0003 Thermal Switch

15 2 333-0021 Washer, X-Star #4

16 2 336-0010 Screw, Ph Fil #4-40 x 3/8

17 1 003-1742 Cable, Triac & Ther. Sx.

18 2 124-0088 Diode 400V, 300A

19 4ft 261-0102 Sleeve, Fibre-glass

20 2 329-0029 Screw, Hex 5/16-18 x 3/4

21 2 333-0010 Washer Spring Lock 5/16

22 2 331-0099 Washer, Flat 5/16

23 2 341-0012 Nut, hex 5/16-18

24 A/R 823-0032 Compound Alcoa #2

25 1 844-0067 Cable, Triac (long)

26 2 333-0025 Wsher, X-Star #10

27 1 261-0516 Insulator, Heat Sink

29 2 336-0030 Screw Ph Fil #8-32 x 1/2

30 6 333-0024 Washer X-Star #8

31 4 333-0009 Washer Spring Lock 1/4

32 1.6ft 261-0505 Protective T rim

33 1 435-1064 Upper Bafﬂ er

34 2 336-0091 Screw Ph Fil #8-32x1 3/4

35 1 435-1063 Lower Bafﬂ er

36 2 341-0006 Nut, Hex #8-32

Items 6, 9, 14 & 28 are not used.

CobraMig 260 Owner's Manual - Page 41

003-1714D

Cap Bank Assembly

1 1 435-1062 Bracket Mounting, Minus

No. Qty. P/N Description

2 4 104-0081 Capacitor 300000uF

3 8 333-0045 Lock Washer #10 Internal Tooth

4 8 325-0225 Screw Pan Slotted #10-32x3/8

5 8 329-0001 Bolt Hex Head 1/4-20x1/2

6 8 333-0027 Lock Washer 1/4" Ext. Tooth

7 4 431-4029 Spacer Cap Bank

8 1 844-0058 Cable Jumper Positive

9 4 331-0099 Washer Flat 5/16"

11 4 333-0010 Lock Washer #5/16 Slit Spring

10 4 329-0029 Bolt Hex Head 5/16-18 x 3/4

12 4 341-0012 Nut 5/16-18 Hex

13 1 844-0059 Cable Power & Posa

14 1 113-0056 Resistor 15 Ohm, 55W

15 2 333-0041 Lock Washer #4 Int-Tooth

16 2 327-0109 Scr Pan Phil T/B #4-40x1/4

17 4 332-0009 Washer 0.265ID Shoulder

18 4 331-0005 Washer Flat #1/4

19 1 435-1061 Bracket Mounting Plus

20 2 844-0084 Cable 12" Power

CobraMig 260 Owner's Manual - Page 42

003-1703

Control Panel Assembly

1 1 436-0045 Screened Panel

No. Qty. P/N Description

2 2 301-0023 Grommet Pnl. Led

3 1 003-1741 Pcb Control Assy.

4 1 401-0075 Knob 2.00 Dia

5 1 003-1311 Closing Contact Cable

6 1 331-0087 Washer Flat Neoprene

CobraMig 260 Owner's Manual - Page 43

003-2063a

Power Block Assembly

1 1 003-1243 Assy Sensor Posa-Start

No. Qty. P/N Description

2 1 313-0021 Stud Receiver Push-On

3 1 329-0054 Scr hex 3/8-16 x 5/8

4 1 331-0002 Washer Flat #6 Stl

5 1 331-0777 Washer ﬂ at 0.391ID x 0.875OD

6 1 333-0252 Wshr Lk Star-In #6 St

7 2 336-0005 Scr Pn Ph 6-32 x .375 Stl

8 1 342-0395 Spacer Current Sensor

9 1 351-0066 Plug Hole 05/16

11 1 435-3038 Bracket Current Sensor

10 1 431-1612 Block Power CB2K

12 1 753-0112 Ftg 1/4NPT Male to 5/8-18 Male

13 1 753-0114 Aptr 1/8NPT x 1/8NPS

14 1 753-0115 Bush 1/4NPT Male to 1/8NPT Fem

15 1 753-0466 Aptr 1/4NPT Male to 5/8-18 Fem

16 3 753-0475 Aptr 1/4NPT M to 5/8-18 Fem Lh

17 A/R 823-0029 Anti-Corrosion Compound

18 A/R 823-0043 Removable Threadlock Compound

19 A/R 823-0044 Pipe Thread Sealant

20 1 333-0011 Washer Spring Lock 3/8

CobraMig 260 Owner's Manual - Page 44

003-2110b

42 VAC Front Panel Assembly

No. Qty. P/N Description

1 1 003-1332 Assy Cbl Rbn 26c

2 1 003-1631 Cable Power Assy.

3 1 003-2024 Assy Pcb Fr Pnl CB 110V

4 1 301-0023 Grommet Panel Mount

5 1 341-0050 Nut 3/8-32 St

6 2 345-0004 Nut Hex Lock 4-40

7 1 401-0012 Knob 01.0 Blk

8 1 436-0144 SS Pnl Fr Cobramatic

9 1 003-1642 Assy Con 7P "w" CB

10 1 351-0835 Snap Btn 01/2 Hole Blk

CobraMig 260 Owner's Manual - Page 45

003-2146

Spindle Assembly

1 1 003-2139 Assy Bearing Spindle

2 3 330-3063 Scr Shldr Mod .25 x .63 10-24

3 3 331-0063 Wshr Flt .355 x .505

No. Qty. P/N Description

4 1 331-0095 Wshr Flt 11/32 x 3/4 Sst

5 1 331-0313 Wshr Leather .75ID x .125 Thk

6 1 345-0018 Nut Hex Lock 5/16-18 St

7 3 419-0059 Spg Comp .468 x .437 x .056

8 1 419-0095 Spg Comp .85 x .69 x .75

9 1 431-1266 Plate Back-up Ring

11 1 437-0258 Retainer Spool Spindle

10 1 431-3726 Adapter Spiral Spindle

12 1 437-0259 Knob T ension Spindle

13 1 437-0260 Spacer Spindle

14 1 437-0645 Spindle

15 1 723-0059 Disk Ratchet Brake

16 1 751-0018 Cap .5 .5 Lg Vinyl Black

17 A/R 823-0049 Thread Locking Permanent

CobraMig 260 Owner's Manual - Page 46

003-2078

Slave Motor Assembly

1 1 003-0176 Assy Knob Conduit

No. Qty. P/N Description

2 1 003-2069 Assy Torque Motor 115V

3 2 328-0024 Scr Shc 8-32 x 3/8 Stl

4 4 328-0259 Scr Shc 8-32 x 1-1/8 Stl

5 1 330-0258 Scr Shldr 1/4 x 1/4 x 10-24

6 1 345-0018 Nut Lock 5/16-18

7 1 419-0085 Spring Comp 1/32 x OD .40

8 1 419-0211 Spring Comp OD 5/8 x 1/16

9 1 431-1576 Bolt Swing Mod

11 1 437-0230 Housing Slave Motor Mold

10 1 435-1582 Plate Locate Slave Motor

12 1 437-0231 Handle Mold Slave Motor

13 1 437-0232 Arm Idler Mold Slave Motor

14 1 437-0245 Cap Bearing Mold

15 1 437-0254 Sleeve Spring

16 1 501-0118 Bearing 1.125 x .50 x .31

17 1 501-0156 Bearing .875 x .38 x .28

18 1 501-0207 Bearing Idler Roll

19 1 507-0130 Shaft Gear

20 1 511-0206 Drive Roll

21 1 753-0210 Guide Wire Inlet

22 A/R 823-0043 Loctile Threadlocking

23 A/R 835-0001 Grease Mobilux 2

24 A/R 823-0051 Loctile Retaining Compound

25 REF 031-0167 Test Procedure

CobraMig 260 Owner's Manual - Page 47

02/01PRN 3253

POT

TORCH

MOTOR

TORCH

TRIGG ER

REV P/ZONE DESCRIPTION / DCN APPR. DATE

WELDING CURREN T SENSOR

003 1307

JUMPER CABLE

003 16 42

MS "W"

AMPHENOL CONNECTOR

TORCH "W" CLK

ABCDEFG

1234567

P/N 003- 2024

FRONT PANEL

COBRAMATIC I

CABLE 003 1631

003 12 43

(TO POWER BLOCK)

MAIN SWITCH AC OUT (N), RED

MAIN SWITCH AC IN (N), BRN

2 1

J1J14 J13

3 2 1

CCW

3 2 1

12345

J7-1 115V (H) RED

J7-3 WELD VOLT RED

J7-2 115V (H) BLK

J7-4 115V (N) WHT

CABLE 003 1332

POSASTART (SOURCE)

MAIN SWITCH AC OUT (H), ORG

POSASTART (RETURN)

MAIN SWITCH AC IN (H), YEL

TORQUE SWITCH (RETURN), GRN

TORQUE SWITCH (SOURCE), BLU

P/N 003 1628

MAIN BOARD

COBRAMATIC I

(+)

J6-1

COBRA I PCB

003-20 78

SLAVE MOTOR

J4-1 115V (H)

J7-6 115V (N) BLU

27VAC

F1 4A

3 1

CW 5K

(+) (-)

ABCDEFG

1234567

TORCH POT CW

TORCH POT WIPER

TORCH POT CCW

TORCH MOTOR (+)

TORCH MOTOR (-)

POWER INDICATOR LED (H)

TORCH TRIGGER 27V (SRC)

TORCH TRIGGER 27V (RTN)

115VAC

157-00 22

RELAY K2

F3 2A

12345

J4-2 115V (N)

003-20 96

BRAKE SOLENOID

27VAC (HOT) BLU

27VAC (COM) YEL

6AB

POWER INDICATOR LED (N)

TO WELD VOLT (+)

CABLE 003 -1311

CONT + ORN

CONT - YEL

WELD VOLT (+) #18GA

1234 1234

115VAC (HOT) BLK

RED

115V N

WHT #18

115VAC (COM) WHT

J6J5

CONT-

2 1

CONT+

2 1

TO WELD VOLT (-)

WELD VOLTAGE JUMPER

(+)

(-)

WELD VOLT (-) #18GA

BLK

BLK #18

115V H

003-05 93

TRANSFORMER RELAY W/ LEADS

27VAC IN (COM) BRN

120VAC RE LAY

P/N 157- 0149

123

REMOTE

J6J1

CONT

12VDC

2 & 3

JP2JP3

JP1

PANEL REMOTE

ORG

28V

146

GRN

PILOT LAMP

27VAC IN (HOT) ORN

12345

METER

TRIAC

T.SWX. &

4 3 2 1

POWER SUPPLY

825

208V

VIO

P/N 003 1741 FOR 60 HZ UNITS

P/N 003 1795 FOR 50 HZ UNITS

CONTROL BOARD

123

27VAC

WHT

BLK

BRN

130V0V0V

208V

235V

YEL

ORG

BRN

GRY

P/N 003 1780

FAN

P/N 003 1706

CABLE 003- 1742

THERMAL SW. RED

THERMAL SW. BRN

TRIAC (+) ORN

TRIAC (-) YEL

P/N 003 1 584

LOGIC XFMR

TB1

P/N 186 0075

INPUT SELECTOR

123456789

WIRING DIAGRAM

JUMPER JP1 TO JP3

NOTES

(ZONE C6)

TO COBRA I J6-1

BLK

JUMPER JP1 TO JP2

1. INPUT S ELECTOR: SEE CM260 UNIVERSAL INPUT

2. FOR PO WER SUPPLY PANEL VOLTAGE CONTROL,

3. FOR PO WER SUPPLY REMOTE VOLTAGE CONTROL,

4. F OR DCRP, PLUG PIGTAIL POWER BLOCK

( + )

( - )

( + )

( - )

WELD VOLT (+)

WELD VOLT (-)

(ZONE C6)

TO COBRA I J6-2

1.2 mH

25/55W

P/N 133 0 007

P/N 113 0056

BLK #2GA

2 1

THERMAL SW

#18GA

29V

P/N 170 0003

825

208V

WHT #8GA

AC HO T

TERMINAL BLOCK

POWER

P/N 186- 0069

TO ( +) TERMINAL AND WORK GROUND CLAMP

TO (-) TERMINAL

TO ( -) TERMINAL AND WORK GROUND CLAMP

TO (+) TERMINAL

5. F OR DCSP, PLUG PIGTAIL POWER BLOCK

4 & 5

003-20 63

POWER BL OCK

.1u/1KV

BLK #2GA

P/N 104 0081

( 30000 uF, 50 VDC) X 4

POWER SUPPLY

2 1

HEAT SINK

P/N 124-0088

POWER DIODE

29V

235V

208V

235V

75A / 600V

HEAT SINK

P/N 125-0033

POWER TRIAC

VR1

510V

CABL E

003-1 772

POWER TRANSFORMER

123456789

WHT #8GA

SW1

40A / 600 V

P/N 159- 3590

WHT #8GA

WHT #8

AC NE U

GRN

071- 0389

M. K. PRODUCTS INC.

CM260 UNIVERSAL INPUT, STANDARD

Title

Size Document Number Rev

P/N 137- 0084

TB2

P/N 186-0075

INPUT SELECTOR

GROUND LUG

P/N 186- 0071

CobraMig 260 Owner's Manual - Page 48

CobraMig 260 Owner's Manual - Page 49

PRN #3253 02/01

12Thursday July 26 2001

Date: Sheet

8 7 6 5 4 3

J3J4

2 1

ABCDE F G

8 7 6 5 4

Bd P/N 003-2024

FRONT PANEL

COBRAMATIC I

3 2 1

ABCDEF G

AMPHENOL CONNECTOR

MS "W"

P/N 003-1642

TORCH "W" CLK

TORCH

MOTOR

TORCH

POT

TORCH

TRIGGER

3 1

CW 5K

(+) (-)

ABCDEFG

071- 0390

M. K. PRODUCTS INC .

REV P/ZONE DESCRIPTION / DCN APPR. DATE

NORMAL/LATCH SW.

GAS SOLENOID

P/N #003-2137

P/N 003-1243

CABLE P/N 003-1631

(TO POWER BLOCK)

CCW

MAIN SWITCH AC IN (N), BRN

2 1

3 2 1

12345

WELDING CURRENT SENSOR

P/N 003-1307

JUMPER CABLE

4 3 2 1

3 2 1

MAIN SWITCH AC OUT (H), ORG

TORQUE SWITCH (RETURN), GRN

TORQUE SWITCH (SOURCE), BLU

MAIN SWITCH AC IN (H), YEL

MAIN SWITCH AC OUT (N), RED

POSASTART (SOURCE)

J1J14 J13

P/N 003-1628

COBRAMATIC I

MAIN BOARD

J1J4

GAS

TRIGGER /HOLD

SPOT TIME

BURN BACK

TIMER

( OPTIONAL )

POSASTART (RETURN)

TORCH POT CW

TORCH POT WIPER

TORCH POT CCW

27VAC

115VAC

J3J2

(OPTIONAL)

Bd P/N 003-2136

KIT P/N 005-0674

PSCB

003-1755

PULSE

Bd P/N

KIT P/N 005-0586

TORCH MOTOR (+)

TORCH MOTOR (-)

POWER INDICATOR LED (H)

TORCH TRIGGER 27V (SRC)

POWER INDICATOR LED (N)

TORCH TRIGGER 27V (RTN)

J6J5

RELAY K2

P/N 157-0022

12345

5 4 3 2 1

1234 1234

WHT

( OPTIONAL )

P/N 003 1762

GRN

297

REMOTE WELD VOLT

123

CABLE

003 1756

J6J1

CONT-

2 1

CONT+

GND

12VDC

JP2JP3

WELD VOLTAGE JUMPER

TO WELD VOLT (+)

TO WELD VOLT (-)

(+)

(-)

WIRE FORWARD (+)

WIRE FORWARD (-)

WELD VOLT (+) #18GA

WELD VOLT (-) #18GA

RED

BLK

BLK #18

115V H

115V N

WHT #18

CONT

12VDC

CCW

BLK

2&3

ORG

28V

3 1

KIT P/N 005 0584

REMOTE

JP1

PANEL REMOTE

ORG

28V0V0V

146

GRN

METER

88.88

( OPTIONAL )

AMP

VOLT

1234567

GND

WF(+)

WF(-)

12VDC

WELD(-)

SHUNT(-)

12345

METER

TRIAC

T.SWX. &

4 3 2 1

P/N 003 1795 FOR 50 HZ UNITS

P/N 003 1741 FOR 60 HZ UNITS

POWER SUPPLY

CONTROL BOARD

123

27VAC

BRN

BLK

WHT

130V

825

208V

235V0V208V

235V

VIO

GRY

BRN

ORG

YEL

003-1324

Bd P/N

KIT P/N 005-0585

METER

TO COBRA I J6-1

CABLE

003 1758

WELD(+)

CABLE 003 1742

THERMAL SW. RED

THERMAL SW. BRN

TRIAC (+) ORN

LOGIC XFMR

TB2

123456789

INPUT SELECTOR

NOTES

1. INPUT SELECTOR: SEE CM260 UNIVERSAL INPUT WIRIN

(ZONE C6)

TO COBRA I J6-1

TRIAC (-) YEL

P/N 003-1584

P/N 186-0075

BLKBLK

JUMPER JP1 TO JP3

JUMPER JP1 TO JP2

TO (+) TERMINAL AND WORK GROUND CLAMP

2. FOR POWER SUPPLY PANEL VOLTAGE CONTROL ,

TO COBRA I J6-2

P/N 133-0007

THERMAL SW

P/N 170-0003

TO (-) TERMINAL

3. FOR POWER SUPPLY REMOTE VOLTAGE CONTROL ,

4. FOR DCRP, PLUG PIGTAIL POWER BLOC K

( + )

( - )

WELD VOLT (+)

WELD VOLT (-)

(ZONE C6)

SHU NT

1.2 mH

25/55W

P/N 113 0056

BLK #2GA

2 1

29V

825

208V

HEAT SINK

WHT

#8GA

RIBBON CABLE FROM COBRA 1 FRONT PANEL, J2, T O

TIMER PCB, J2

TO (-) TERMINAL AND WORK GROUND CLAMP

TO (+) TERMINAL

6. WITHOUT GAS/TRIGGER HOLD KIT, PLUG 26 PI N

5. FOR DCSP, PLUG PIGTAIL POWER BLOCK

4 & 5

POWER BLOCK

P/N 003-2063

.1u/1KV

P/N 002-0481

(-) (+)

BLK #2GA

P/N 104-0081

POWER SUPP LY

( 30000 uF, 50 VDC) X 4

HEAT SINK

2 1

235V0V208V

POWER TRIAC

POWER DIODE

75A / 600V

P/N 125-0033

29V

WHT #8GA

P/N 124-0088

POWER XFMR

235V

123456789

CM 260 UNIVERSAL INPUT, WITH OPTIONS

Title

Size Document Number Rev

P/N 137-0084

TB1

P/N 186-0075

INPUT SELECTOR

TO J14

(OPTIONAL)

P/N 005-0167

CABINET POT KIT

J7-1 115V (H) RED

J7-3 WELD VOLT RED

J7-2 115V (H) BLK

J7-4 115V (N) WHT

(+)

COBRA I PCB

J7-6 115V (N) BLU

SLAVE MOTOR

J6-1

J4-1 115V (H)

P/N 003-2078

J4-2 115V (N)

BRAKE

PILOT LA MP

P/N 003-0593

SOLENOID

P/N 003-2096

27VAC (HOT) BLU

27VAC (COM) YEL

6AB

115VAC (HOT) BLK

115VAC (COM) WHT

120VAC RELAY

27VAC IN (COM) BRN

27VAC IN (HOT) ORN

TRANSFORMER RELAY W/ LEADS

P/N 157-0149

CobraMig 260 Owner's Manual - Page 50

P/N 003-1780

FAN

P/N 003-1706

#18GA #18GA

TERMINAL BLOCK

POWER

AC HOT

WHT #8GA

P/N 186-0069

VR1

CABLE

P/N 003-1772

510V

SW 1

40A / 600 V

P/N 159-3590

AC NEU

GRN

WHT #8GA

WHT #8

GROUND LUG

P/N 186-0071

ABCDEFG

TORCH "W" CLOCK

REV.

P/ZONE

DESCRIPTION/DCN #

DATE

APPRV.

FOR 0.030 - 0.035

FOR ALL

OTHER

PRN 28

TORQUETORQU

POSA ST

ART

POSA ST

ART

TORCH PO

T CW

TORCH POT

WIPER

TORCH POT

CCW

TORCH TRIGGER 2

7VAC (H)

TORCH TRIGGER 2

7VAC (H)

TORCH MOTO

R (+)

TORCH MOTO

R (-)

POWER INDICATOR

LED (H)

POWER INDICATOR

LED (N)

01/9

DCN 11

559

12/9

115VAC

(N)

115VAC

(N)

115VAC

(H)

115VAC

(H)

DCN 12

472

12/0

(+)

(-)

MOTOR

TORCH

POT

TORCH

TRIGGER

ABCDEFGABCDEF

REVISIONS

CKT

DCN 12

582

2/0

123456789

1011121314151617181920212223242526

1234567

GREEN

100

SW3

SW SPD

300 O

SW SP

SW1

SW1B

2.7K 1/2W

5K P

CobraMig 260 Owner's Manual - Page 51

CobraMig 260 Owner's Manual - Page 52

LIMITED WARRANTY

Effective March 1, 2001

This warranty supersedes all previous MK Products warranties and is

exclusive, with no other guarantees or warranties expressed or implied.

LIMITED WARRANTY - MK Products,Inc.,Irvine,California

warrants that all new and unused equipment furnished by MK Products is free from defect in workmanship and material as of the time and place of delivery by MK Products. No warranty is made by MK Products with respect to trade accessories or other items manufactured by others. Such trade accessories and other items are sold subject to the warranties of their respective manufacturers, if any.

MK Products’ warranty does not apply to components having normal useful life of less than one (1) year, such as relay points, wire conduit, tungsten, and welding torch parts that come in contact with the welding wire, including nozzles, nozzle insulators, and contact tips where failure does not result from defect in workmanship or material.

In the case of MK Products’ breach of warranty or any other duty with respect to the quality of any goods, the exclusive remedies therefore shall be at MK Products’ option: (1) repair; (2) replacement; (3) where authorized in writing by MK Products, the reasonable cost of repair or replacement at our Irvine, California plant; or (4) payment of or credit for the purchase price (less reasonable depreciation based upon actual use) upon return of the goods at customer’s risk and expense. Upon receipt of notice of apparent defect or failure, MK Products shall instruct the claimant on the warranty claim procedures to be followed.

As a matter of general policy only, MK Products may honor an original user’s warranty claims on warranted equipment in the event of failure resulting from a defect within the following periods from the date of delivery of equipment to the original user:

1. Torches, Weldheads & Water Recirculators ..........1 year

2. All Other Equipment ...............................................3 years

3. Repairs ..................................................................90 days

Classiﬁ cation of any item into the foregoing categories shall be at the sole discretion of MK Products. Notiﬁ cation of any failure must be made in writing within 30 days of such failure.

A copy of the invoice showing the date of sale must accompany products returned for warranty repair or replacement.

All equipment returned to MK Products for service must be properly packaged to guard against damage from shipping. MK Products will not be responsible for any damages resulting from shipping.

Normal surface transportation charges (both ways) for products returned for warranty repair or replacement will be borne by MK Products, except for products sold to foreign markets.

ANY EXPRESS WARRANTY NOT PROVIDED HEREIN AND ANY IMPLIED WARRANTY , GUARANTY, OR REPRESENTATION AS TO PERFORMANCE, AND ANY REMEDY FOR BREACH OF CONTRACT WHICH, BUT FOR THIS PROVISION, MIGHT ARISE BY IMPLICATION, OPERATION OF LAW, CUSTOM OF TRADE, OR COURSE OF DEALING, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR PARTICULAR PURPOSE, WITH RESPECT TO ANY AND ALL EQUIPMENT FURNISHED BY MK PRODUCTS, IS EXCLUDED AND DISCLAIMED BY MK PRODUCTS.

EXCEPT AS EXPRESSLY PROVIDED BY MK PRODUCTS IN WRITING, MK PRODUCTS ARE INTENDED FOR ULTIMATE PURCHASE BY COMMERCIAL/INDUSTRIAL USERS AND FOR OPERATION BY PERSONS TRAINED AND EXPERIENCED IN THE USE AND MAINTENANCE OF WELDING EQUIPMENT AND NOT FOR CONSUMERS OR CONSUMER USE. MK PRODUCTS WARRANTIES DO NOT EXTEND TO, AND NO RE-SELLER IS AUTHORIZED TO EXTEND MK PRODUCTS’ WARRANTIES TO ANY CONSUMER.

MK Products, Inc.

16882 Armstrong Ave. Irvine, CA 92606 Tel (949)863-1234 Fax (949)474-1428

DATE : March 1, 2001

MK PRODUCTS, INC.

16882 ARMSTRONG AVE.

IRVINE,CALIFORNIA 92606

(949) 863-1234 FAX (949) 474-1428

MK Products CobraMig 260 PS User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual