Northern Industrial Tools 628575 User manual
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Northern Industrial Tools el:Welder 628575 is a Flux Core 125 portable Gasless Wire Feed Welder, ideal for light industrial applications, welding mild steel from 18 gauge up to 3/16”. It uses AC single phase 115v (110-120V) and features two heat settings, infinite wire speed control, and overload and thermal protection. No gas is required, as it uses flux core wire. It comes with a portable wire feed welder, contact tip, sample spool of flux core wire, large spool adapter, chipping hammer, wire brush and operator's manual.
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Flux Core 125 Item# 628575 OPERATOR’S MANUAL Read carefully and understand RULES FOR SAFE OPERATION and instructions before operating. Failure to follow the safety rules and other basic safety precautions may result in serious personal injury. Flux Core 125 Item# 628575 Operation Instructions For technical questions and replacement parts, please call 1-800-222-5381. Thank you very much for choosing a NORTHERN TOOL + EQUIPMENT CO., product. For future reference, please complete the owner’s record below: Model:________________ Purchase Date:___________________ Save the receipt, warranty information and this owner’s manual. It is important that you read the entire manual to become familiar with this product before using it. This machine is designed for certain applications only. Northern Tool + Equipment strongly TGEQOOGPFUVJCVVJKUOCEJKPGPQVDGOQFKſGFCPFQTWUGFfor any application other than that for which it was designed. If you have questions relative to a particular application, DO NOT use the machine before you contact Northern Tool + Equipment to determine if it can be performed on the product. Before using this welding unit, please read the following instructions carefully. SAVE THIS MANUAL You will need this manual for the safety warnings and precautions, assembly (if any), operating, inspection, maintenance and cleaning procedures, parts list and assembly diagram. Keep your receipt and this manual in a safe and dry place for future reference. Northern Industrial Welder Operating Instructions and Parts Manual Flux Core 125 Please read and save these instructions. Read through this owner’s manual carefully before using product. Protect yourself and others by observing all safety information, warnings, and cautions. Failure to comply with instructions could result in personal injury and/or damage to product or property. Please retain instructions for future reference. Wire Feed, Gasless Welder Description Flux Core 125 portable Gasless Wire Feed Welder. Uses AC single phase 115v (110-120V), 60Hz/20amp with time delayed fuse or circuit breaker. Features two heat settings, infinite wire speed control, over load and thermal protection. Ideal for use welding mild steel 18 gauge to 3/16” for light industrial applications (for use with Flux Core wire only). Specifications and Dimension DESCRIPTION Power supply No-load voltage Output Range Duty cycle Suggested wire Wire Diameter Dimension (L x W x H) Weight SPECIFICATION 1ph-115V-60HZ 27V 60-80A (Peak 125A) 20% Flux Core wire .030”, .035” 17.7”x9.3”x14.3” 38 lbs Removing from carton 1.1 Remove cartons, bags or Styrofoam containing the welder and accessories. 1.2 Check the contents with the packing list below. ITEM QTY. Portable Wire Feed Welder Contact tip, .030” Sample spool Flux Core wire, .030” Large spool adapter Chipping hammer/ wire brush Operator’s Manual 1 1 unit 2pc 1 spool 1pc 1pc 1set Northern Industrial Welder Operating Instructions and Parts Manual Flux Core 125 Wire Feed, Gasless Welder 1.3 After unpacking unit, inspect for any damage that may have occurred during transit. Check for loose, missing, or damaged parts. Shipping damage claim must be filed with carrier. Know your Welder Wire Compartment 1-2 voltage Setting On/off switch Wire speed setting Thermal Overload indicator MIG Gun Ground cable and clamp ON/OFF Switch In the “OFF” position no power is being supplied to the MIG gun/torch. In the “ON” position power is supplied to the main transformer and control circuit Wire compartment Inside the wire compartment are the wire feeder, spool hub, and set up chart. 1-2 Voltage Setting 1 (low), 2 (high) voltage switch is on the front panel of the machine, Refer to the “set up” chart inside the wire feed compartment for initial adjustment settings. Wire speed setting Adjustment of the wire feed speed (amperage). Ground cable and clamp The ground cable and clamp are attached to the work piece to complete the circuit allowing the flow of current needed to weld. Welding Cable and MIG gun/torch The welding wire is driven through the welding cable and MIG gun/torch to the work piece. It is attached to the drive system, the gun trigger activates the drive motor. Thermal Indicator If the duty cycle of the welder is exceeded the internal temperature will exceed safe temperatures the machine will shut down and the thermal overload light will come on.Allow 15 minutes for cool down before the light will go off and the temperature to fall into an allowable operating range. Power Cord 2 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder The power cord connects the welder to the 115 volt power supply. Plug the 15 amp plug into a 115 volt/20 amp receptacle to supply power to the welder. General Safety Information 1.1 Your Welding Environment -Keep the environment you will be welding in free from flammable materials. -Always keep a fire extinguisher accessible to your welding environment. -Always have a qualified person install and operate this equipment. -Make sure the area is clean, dry and ventilated. Do not operate the welder in humid, wet or poorly ventilated areas. -Always have your welder maintained by a qualified technician in accordance with local, state and national codes. -Always be aware of your work environment. Be sure to keep other people, especially children, away from you while welding. -Keep harmful arc rays shielded from the view of others. -Mount the welder on a secure bench or cart that will keep the welder secure and prevent it from tipping over or falling. 1.2 Your Welder’s Condition -Check ground cable, power cord and welding cable to be sure the insulation is not damaged. Always replace or repair damaged components before using the welder. -Check all components to ensure they are clean and in good operating condition before use. 1.3 Use of Your Welder wire or wire feed system is wet. Do not immerse them in water. These components and the welder must be completely dry before attempting to use the welder. -Follow the instructions in this manual. -Keep welder in the off position when not in use. -Connect ground lead as close to the area being welded as possible to ensure a good ground. -Do not allow any body part to come in contact with the welding wire if you are in contact with the material being welded, ground or electrode from another welder. -Do not weld if you are in an awkward position. Always have a secure stance while welding to prevent accidents. Wear a safety harness if working above ground. -Do not drape cables over or around your body. -Wear a full coverage helmet with appropriate shade lens (see ANSI Z87.1 safety standard) and safety glasses while welding. -Wear proper gloves and protective clothing to prevent your skin from being exposed to hot metals, UV and IR rays. -Do not overuse or overheat your welder. Allow proper cooling time between duty cycles. -Keep hands and fingers away from moving parts and stay away from the drive rolls. -Do not point MIG gun at any body part of yourself or anyone else. Do not operate the welder if the output cable, electrode, MIG gun, 3 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder -Do not breathe in fumes emitted by the welding process. Make sure your breathing air is clean and safe. -Work only in a well-ventilated area or use a ventilation device to remove welding fumes from the environment where you will be working. -Do not weld on coated materials (galvanized, cadmium plated or containing zinc, mercury or barium). They will emit harmful fumes that are dangerous to breathe. If necessary use a ventilator, respirator with air supply or remove the coating from the material in the weld area. -The fumes emitted from some metals when heated are extremely toxic. Refer to the material safety data sheet for the manufacturer’s instructions. -Do not weld near materials that will emit toxic fumes when heated. Vapors from cleaners, sprays and degreasers can be highly toxic when heated. UV and IR Arc Rays -Always use this welder in the rated duty cycle to prevent excessive heat and failure. 1.4 Specific Areas of Danger, Caution or Warning Electrical Shock Electric arc welders can produce a shock that can cause injury or death. Touching electrically live parts can cause fatal shocks and severe burns. While welding, all metal components connected to the wire are electrically hot. Poor ground connections are a hazard, so secure the ground lead before welding. -Wear dry protective apparel: coat, shirt, gloves and insulated footwear. -Insulate yourself from the work piece. Avoid contacting the work piece or ground. - Do not attempt to repair or maintain the welder while the power is on. -Inspect all cables and cords for any exposed wire and replace damaged or wore cables immediately. -Use recommended replacement cables and cords. -Always attach ground clamp to the work piece or work table as close to the weld area as possible. -Do not touch the welding wire and the ground or grounded work piece at the same time. -Do not use a welder to thaw frozen pipes. Fumes and Gases The welding arc produces ultraviolet (UV) and infrared (IR) rays that can cause injury to your eyes and skin. Do not look at the welding arc without proper eye protection. -Always use a helmet that covers your full face from the neck to top of head and to the back of each ear. -Use a lens that meets ANSI standards and safety glasses. For welders under 160 Amps output, use a shade 10 lens; for above 160 Amps, use a shade 12. Refer to the ANSI standard Z87.1 for more information. -Cover all bare skin areas exposed to the arc with protective clothing and -Fumes emitted from the welding process displace clean air and can result in injury or death. 4 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder -To prevent any unintended arcs, cut wire back to ¼" stick out after welding. Hot Materials shoes. Flame-retardant cloth or leather shirts, coats, pants or coveralls are available for protection. -Use screens or other barriers to protect other people from the arc rays emitted from your welding. -Warn people in your welding area when you are going to strike an arc so they can protect themselves. Fire Hazards Welded materials are hot and can cause severe burns if handled improperly. -Do not touch welded materials with bare hands. -Do not touch MIG gun nozzle after welding until it has had time to cool down. Sparks/Flying Debris Do not weld on containers or pipes that contain or have had flammable, gaseous or liquid combustibles in them. Welding creates sparks and heat that can ignite flammable and explosive materials. -Do not operate any electric arc welder in areas where flammable or explosive materials are present. -Remove all flammable materials within 35 feet of the welding arc. If removal is not possible, tightly cover them with fireproof covers. -Take precautions to ensure that flying sparks do not cause fires or explosions in hidden areas, cracks or areas you cannot see. -Keep a fire extinguisher close in the case of fire. -Wear garments that are oil-free with no pockets or cuffs that will collect sparks. -Do not have on your person any items that are combustible, such as lighters or matches. -Keep work lead connected as close to the weld area as possible to prevent any unknown, unintended paths of electrical current from causing electrical shock and fire hazards. Welding creates hot sparks that can cause injury. Chipping slag off welds creates flying debris. -Wear protective apparel at all times: ANSI-approved safety glasses or shield, welder’s hat and ear plugs to keep sparks out of ears and hair. Electromagnetic Field -Electromagnetic fields can interfere with various electrical and electronic devices such as pacemakers. -Consult your doctor before using any electric arc welder or cutting device -Keep people with pacemakers away from your welding area when welding. -Do not wrap cable around your body while welding. -Wrap MIG gun and ground cable together whenever possible. -Keep MIG gun and ground cables on the same side of your body. Shielding Gas Cylinder can explore 5 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder delayed fuse or circuit breaker is required. DO NOT OPERATE THIS UNIT if the ACTUAL power source voltage is less than 105 volts ac or greater than 132 volts ac. High pressure cylinders can explode if damaged, so treat them carefully. -Never expose cylinders to high heat, sparks, open flames, mechanical shocks or arcs -Do not touch cylinder with MIG gun. -Do not weld on the cylinder. -Always secure cylinder upright to a cart or stationary object cart or stationary object -Do not touch cylinder with MIG gun. -Do not weld on the cylinder. -Always secure cylinder upright to a cart or stationary object. -Keep cylinders away from welding or electrical circuits. -Use the proper regulators, gas hose and fittings for the specific application • High voltage danger from power source! Consult a qualified electrician for proper installation of receptacle. This welder must be grounded while in use to protect the operator from electrical shock. • Do not remove grounding prong or alter the plug in any way. Do not use any adapters between the welder’s power cord and the power source receptacle. Make sure the POWER switch is OFF when connecting your welder’s power cord to a properly grounded 115 VAC, 60Hz, 1 phase, 20 amp input power supply. 2. Extension cord We do not recommend an extension cord because of the voltage drop they produce. This drop in voltage can affect the performance of the welder. If you need to use an extension cord it must be a size #12 gauge or larger. Do not use an extension cord over 25 ft. in length. 3. Install the wire roller Open the wire feed compartment. Before installing any welding wire into the unit, the proper sized groove must be placed into position on the wire drive mechanism. Adjust the drive roller according to the following steps, see following picture about the wire feeder structure: Assembly INSTALLING THE HANDLE 1. Line up the holes in the handles with the holes on the top of the welder. 2 Place a lock washer then a washer onto the welder handle screws. 3 Insert the screws with the washers through the holes on the welder handle and into the top of the welder and tighten. MIG gun/torch assembled, some assembly required for ground cable. Installation 1. Power requirement AC single phase 115v (110-120V), 60HZ fused with a 20amp time 6 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder Inlet Guide Tube Drive Tension Adjustment Drive tension arm outside edge of the wire spool and bend it over to hold the wire in place. Remove the spool of wire from the drive compartment of the welder. 3.4. Rotate the Drive Roller Cap counterclockwise and remove it from the Drive Roller. Gun liner Drive Roller 3.1. Open the door to the welder drive compartment. 3.2. Remove the drive tension (see 1) by loosening the tension adjusting knob and lifting the Drive Tension Adjustor away from the Drive Tension Arm (see 2). Lift the drive tension arm away from the drive roller (see 3). See following images for reference 3.5. Pull the Drive Roller off of the Drive Roller Shaft. 3.6 Based on the wire diameter, select the correct groove using the following table. Wire Diameter Roller Groove .030 inch 0.9 .035 inch 0.9 The drive roller has two wire size grooves built into it. When installing the drive roller, the number stamped on the drive roller for the wire size you are using should be facing you. Push the drive roller onto the drive roller shaft. 3.3. If there is wire already installed in the welder, roll it back onto the wire spool by hand-turning the spool clockwise. Be careful not to allow the wire to come out of the rear end of the inlet guide tube without holding onto it or it will unspool itself. Put the end of the wire into the hole on the 7 )OX[&RUH 1RUWKHUQ,QGXVWULDO:HOGHU 2SHUDWLQJ,QVWUXFWLRQVDQG3DUWV0DQXDO :LUH)HHG*DVOHVV:HOGHU 127( %HIRUHLQVWDOOLQJPDNHVXUHWKDW\RX KDYHUHPRYHGDQ\ROGZLUHIURPWKH 0,*JXQ$VVHPEO\7KLVZLOOKHOSWR SUHYHQWWKHSRVVLELOLW\RIWKHZLUH MDPPLQJLQVLGHWKHJXQ/LQHU %HYHU\FDUHIXOZKHQUHPRYLQJWKH ZHOGLQJQR]]OH7KHFRQWDFWWLSRQ WKLVZHOGHULVOLYHZKHQHYHUWKHWRUFK WULJJHULVSXOOHG0DNHFHUWDLQ 32:(5LVWXUQHG2)) 5HPRYHWKHQR]]OHDQGFRQWDFW WLSIURPWKHHQGRIWKHWRUFKDVVHPEO\ 6HHEHORZ 5HLQVWDOOWKH'ULYH5ROOHU&DS DQGORFNLQSODFHE\WXUQLQJLW FORFNZLVH &ORVHWKHGRRUWRWKHZHOGHU GULYHFRPSDUWPHQW ,QVWDOOWKHZLUH 6HOHFWLQJWKHZLUH $YDLODEOHZLUHIRUWKLVPDFKLQH :LUH7\SH $YDLODEOHRUQRW 0,*ZLUH 1R )OX[&RUHZLUH <HV LQFK )OX[&RUHZLUH <HV LQFK %RWKIRXULQFKRUHLJKWLQFKZLUH VSRROVRILQFKRULQFKVHOI VKLHOGLQJ)OX[&RUHZLUHFDQEHXVHG RQWKLVZHOGHU6WHHOIURPJDXJH XSWRLQFKWKLFNFDQEHZHOGHG ZLWKWKLVZLUH 127( 0HWDOWKLQQHUWKDQJDXJHFDQQRW EHZHOGHGZLWKWKLVPDFKLQH $WWHPSWLQJWRGRVRZLOOFDXVHEXUQ WKURXJKLQWKHPHWDO\RXDUHLQWHQGLQJ WRZHOG 5HPRYHDQ\ZLUHWKDWLVUXVW\LIWKH ZKROHVSRROLVUXVW\GLVFDUGLW ,QVWDOOWKHZLUH 0DNHVXUHWKHSURSHUJURRYHRQ WKHGULYHUROOHULVLQSODFHIRUWKHZLUH LQVWDOOHG,IQRWFKDQJHWKHGULYH UROOHUDVGHVFULEHGLQVHFWLRQDERYH 5HPRYHWKHSDFNDJLQJIURPWKH VSRRORIZLUHDQGWKHQLGHQWLI\WKH OHDGLQJHQGRIWKHZLUHVHFXUHGRQ WKHHGJHRIWKHVSRRO'2127 81+22.,7$77+,67,0( 3ODFHWKHVSRRORQWKHVSRRO KXEZLWKWKHZLUHFRPLQJRIIWKH ERWWRPRIWKHVSRRO7KHZHOGLQJZLUH VKRXOGDOZD\VFRPHRIIWKHERWWRPRI WKHVSRROLQWRWKHGULYHPHFKDQLVP 6HHIROORZLQJILJXUH (OHFWULFVKRFNFDQNLOO$OZD\VWXUQ WKH32:(5VZLWFK2))DQG XQSOXJWKHSRZHUFRUGIURPWKHDF SRZHUVRXUFHEHIRUHLQVWDOOLQJZLUH Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder unspool itself when the trigger is released. Readjust the spool tension using the wing nut as necessary to correct for either problem. 4.2.7. With the welder disconnected from the power source, remove the leading end of the wire from the spool. Hold on to it securely, so as not to allow unspooling or tangling of the wire as it will result in tangled wire and lost time. 4.2.8. Cut off any bent portion of the wire using a wire cutter. 4.2.9. Loosen the tension adjusting knob holding the drive tension arm in place and lift the tension arm up off the drive roller. 4.2.10. Insert the wire into the inlet guide tube, feed it across the drive roller and into the torch assembly about six inches. 4.2.5 The welder can use either 4” or 8” spools, see the following figure for additional reference. 8” spool requires an adaptor. The wing nut controls the tension on the spool. Wing nut 8” wire spool 4” wire spool 8” spool Adaptor • Make certain that the welding wire is actually going into the torch liner. If not, the wire will jam up in the mechanism. 4.2.11 Line the wire up with the correct groove in the drive roller. Place the drive tension arm back above the drive roller. 4.2.12 Place the drive tension adjustment arm back in place. 4.2.13 Tighten (turn clockwise) the drive tension adjusting knob until the tension roller is applying enough force on the wire to prevent it from slipping in the drive rollers. 4.2.14. NOW YOU CAN LET GO OF THE WIRE. 4.2.15. Plug in and turn the welder ON. Set the VOLTAGE switch to the voltage (heat) setting recommended for the gauge metal that is to be 4.2.6. Setting the wire spool tension: a) Turn the spool of wire with one hand. b) Increase the spool tension by tightening (turn clockwise) the wing nut while turning the spool. Turn the spool while tightening the wing nut until the spool slows down and operator feels a slight drag. Stop tightening the wing nut, operator may need to repeat these steps until proper spool tension is achieved. NOTE: If TOO MUCH tension is applied to the wire spool, the wire will slip on the drive roller or will not be able to feed at all. If TOO LITTLE tension is applied, the spool of wire will want to 9 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder certain that the wire coming out of the end of the torch does not come in contact with work piece, ground clamp or any grounded material during the drive tension setting process or arcing will occur. 5.1. Press the trigger on the gun. 5.2. Turn the drive tension adjustment knob clockwise, increasing the drive tension until the wire seems to feed smoothly without slipping. welded. Refer to the set up chart on the back side of the drive compartment door. CAUTION: The welding wire is electrically hot when the power is on and the MIG gun trigger is activated. . 4.2.16. Set the WIRE SPEED control to the middle of the wire speed range. 4.2.17. Straighten the MIG gun cable and pull the trigger in the gun handle to feed the wire through the torch assembly. When at least one inch of the wire sticks out past the end of the torch, release the trigger. 4.2.18 Turn the Power Switch to the OFF position. 4.2.19 Select a contact tip stamped with the same diameter as the wire being used. NOTE: Due to inherent variances in FluxCored welding wire, it may be necessary to use a contact tip one size larger than your Flux Core wire if wire jams occur. 4.2.20. Slide the contact tip over the wire (protruding from the end of the MIG gun). Thread the contact tip into the end of the gun and hand-tighten securely. 4.2.21. Install the nozzle on the gun assembly. To keep spatter from sticking to inside of the nozzle use anti-spatter spray or gel. 4.2.22 Cut off excess wire that extends past the end of the nozzle more than ¼”. 4.2.23. Turn the welder ON 5. Setting the wire tension Operation High voltage danger from power source! Consult a qualified electrician for proper installation of receptacle at the power source. This welder must be grounded while in use to protect the operator from electrical shock. If you are not sure if your outlet is properly grounded, have it checked by a qualified electrician. Do not cut off the grounding prong or alter the plug in any way and do not use any adapters between the welder’s power cord and the power source receptacle. Make sure the POWER switch is OFF then connect your welder’s power cord to a properly grounded 115 Vac (110v-120v), 60Hz, single phase, 20 amp power source. 1. Main control component Power switch - The power switch supplies electrical current to the welder. Whenever the power switch is in the ON position, the welding circuit is activated. ALWAYS turn the power switch to the OFF position and unplug the welder before performing any maintenance. Arc flash can injure eyes! To reduce the risk of arc flash, make 10 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder Voltage selector - The voltage selector controls the welding heat. This unit has two step voltage control. Refer to the label inside the welder side door for recommended voltage selector settings for your welding job. Wire speed control - The wire speed control adjusts the speed at which the wire is fed out of the welding torch. The wire speed needs to be closely matched (tuned-in) to the rate at which it is being melted off. Some things that affect wire speed selection are the type and diameter of the wire being used, the heat setting selected, and the welding position to be used. Note: The wire will feed faster without an arc. When an arc is being drawn, the wire speed will slow down. 2. Hold the torch (MIG gun) The best way to hold the welding torch is the way that feels most comfortable to you. While practicing to use your new welder, experiment holding the torch in different positions until you find the one that seems to work best for you. 3. Position the torch to the work piece There are two angles of the torch nozzle in relation to the work piece that must be considered when welding. 3.1. Angle A can be varied, but in most cases the optimum angle will be 60 degrees, the point at which the torch handle is parallel to the work piece. If angle A is increased, penetration will increase. If angle A is decreased, penetration will decrease also. 3.2. Angle B can be varied for two reasons: to improve the ability to see the arc in relation to the weld puddle and to direct the force of the arc. 4. Distance from the work piece If the nozzle is held off the work piece, the distance between the nozzle and the work piece should be kept constant and should not exceed 1/4 inch or the arc may begin sputtering, signaling a loss in welding performance. 5. Tuning in the wire speed This is one of the most important parts of MIG welder operation and must be done before starting each welding job or whenever any of the following variables are changed: heat setting, wire diameter, or wire type. EXPOSURE TO A WELDING ARC IS EXTREMELY HARMFUL TO THE EYES AND SKIN! Prolonged exposure to the welding arc can cause blindness and burns. Never strike an arc or begin welding until you are adequately 11 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder diameter wire, or a different type of welding wire. protected. Wear flameproof welding gloves, a heavy long sleeved shirt, trousers with out cuffs, high topped shoes, and an ANSI approved welding helmet. 5.1. Connect the Ground Clamp to a scrap piece of the same type of material which you will be welding. It should be equal to or greater than the thickness of the actual work piece, and free of oil, paint, rust, etc. 5.2. Select a heat setting. 5.3. Hold the torch in one hand, allowing the nozzle to rest on the edge of the work piece farthest away from you, and at an angle similar to that which will be used when welding. (See HOLDING THE TORCH if you are uncertain of the angle at which you will be welding). 5.4. With your free hand, turn the Wire Speed Dial to maximum and continue to hold onto the knob. 5.5. Lower your welding helmet and pull the trigger on the torch to start an arc, then begin to drag the torch toward you while simultaneously turning the Wire Speed Dial counterclockwise. 5.6. LISTEN! As you decrease the wire speed, the sound that the arc makes will change from a sputtering to a high-pitched buzzing sound and then will begin sputtering again if you decrease the wire speed too much. The point on the wire speed adjustment where the high-pitched buzzing sound is achieved is the correct setting. You can use the wire speed control to slightly increase or decrease the heat and penetration for a given heat setting by selecting higher or lower wire speed settings. Repeat this tune-in procedure if you select a new heat setting, a different 6. Welding Techniques EXPOSURE TO A WELDING ARC IS EXTREMELY HARMFUL TO THE EYES AND SKIN! Prolonged exposure to the welding arc can cause blindness and burns. Never strike an arc or begin welding until you are adequately protected. Wear flameproof welding gloves, a heavy long sleeved shirt, trousers with out cuffs, high topped shoes and an ANSI approved welding helmet. ELECTRIC SHOCK CAN KILL! To prevent ELECTRIC SHOCK, do not perform any welding while standing, kneeling, or lying directly on the grounded work. 6.1 Moving the torch Torch travel refers to the movement of the torch along the weld joint and is broken into two elements: Direction and Speed. A solid weld bead requires that the welding torch be moved steadily and at the right speed along the weld joint. Moving the torch too fast, too slow, or erratically will prevent proper fusion or create a lumpy, uneven bead. Travel direction is the direction the torch is moved along the weld joint in relation to the weld puddle. The torch is either PUSHED into the weld puddle or PULLED away from the weld puddle. 12 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder For most welding jobs you will pull the torch along the weld joint to take advantage of the greater weld puddle visibility. Travel speed is the rate at which the torch is being pushed or pulled along the weld joint. For a fixed heat setting, the faster the travel speed, the lower the penetration and the lower and narrower the finished weld bead. Likewise, the slower the travel speed, the deeper the penetration and the higher and wider the finished weld bead. 6.2 Types of welding beads As you become more familiar with your new welder and better at laying some simple weld beads, you can begin to try some different weld bead types. The STRINGER BEAD is formed by traveling with the torch in a straight line while keeping the wire and nozzle centered over the weld joint. See following figure. 6.3 Welding position FLAT POSITION is easiest of the welding positions and is most commonly used. It is best if you can weld in the flat position if at all possible as good results are easier to achieve. HORIZONTAL POSITION Is performed very much the same as the flat weld except that angle B (see HOLDING THE TORCH) is such that the wire, directed more toward the metal above the weld joint is to help prevent the weld puddle from running downward while still allowing slow enough travel speed. A good starting point for angle B is about 30 degrees DOWN from being perpendicular to the work piece. The WEAVE BEAD Used when you want to deposit metal over a wider space than would be possible with a stringer bead. It is made by weaving from side to side while moving with the torch. It is best to hesitate momentarily at each side before weaving back the other way. VERTICAL POSITION It is easier for many people to Pull the torch from top to bottom. It can be difficult to prevent the puddle from running downward. Pushing the torch from 13 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder The illustrations in following figure show the sequence for laying multiple pass beads into a single “V” butt joint. bottom to top may provide better puddle control and allow slower rates of travel speed to achieve deeper penetration. When vertical welding, angle B (see HOLDING THE TORCH) is usually always kept at zero, but angle A will generally range from 45 to 60 degrees to provide better puddle control. OVERHEAD POSITION Is the most difficult welding position. Angle A (see HOLDING THE TORCH) should be maintained at 60 degrees. Maintaining this angle will reduce the chances of molten metal falling into the nozzle. Angle B should be held at zero degrees so that the wire is aiming directly into the weld joint. If you experience excessive dripping of the weld puddle, select a lower heat setting. Also, the weave bead tends to work better than the stringer. NOTE: WHEN USING SELF-SHIELDING FLUX-CORE WIRE it is very important to thoroughly chip and brush the slag off each completed weld bead before making another pass or the next pass will be of poor quality. Fillet Weld Joints. Most fillet weld joints, on metals of moderate to heavy thickness, will require multiple pass welds to produce strong joint. The illustrations in Figure 19 show the sequence of laying multiple pass beads into a T fillet joint and a lap fillet joint. 6.4 Multiple pass welding Butt Weld Joints When butt welding thicker materials, you will need to prepare the edges of the material to be joined by grinding a bevel on the edge of one or both pieces of the metal being joined. When this is done, a “V” is created between the two pieces of metal, that will have to be welded closed. In most cases more than one pass or bead will need to be laid into the joint to close the “V”. Laying more than one bead into the same weld joint is known as a multiple-pass weld. 6.5 Spot welding There are three methods of spot welding: Burn-Through, Punch and Fill, and Lap. Each has advantages 14 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder 3. The LAP SPOT METHOD directs the welding arc to penetrate the bottom and top pieces, at the same time, right along each side of the lap joint seam. Select the wire diameter, heat setting, and tune in the wire speed as if you were welding the same thickness material with a continuous bead. 6.6 SPOT WELDING INSTRUCTIONS 1. Select the wire diameter and heat setting recommended above for the method of spot welding you intend to use. 2. Tune in the wire speed as if you were going to make a continuous weld. 3. Hold the nozzle piece completely perpendicular to and about 1/4 inch off the work piece. 4. Pull the trigger on the torch and release it when it appears that the desired penetration has been achieved. 5. Make practice spot welds on scrap metal, varying the length of time you hold the trigger, until a desired spot weld is made. 6. Make spot welds on the actual work piece at desired locations. and disadvantages depending on the specific application as well as personal preference. 1. The BURN-THROUGH METHOD welds two overlapped pieces of metal together by burning through the top piece and into the bottom piece. With the burn-through method, larger wire diameters tend to work better than smaller diameters. Wire diameters that tend to work best, with the burnthrough method are 0.035 inch selfshielding Flux-Core wire. Do not use 0.030 inch self-shielding Flux Core wires when using the burn-through method unless the metal is VERY thin or excessive filler metal build-up and minimal penetration is acceptable. Always select the HIGH heat setting with the burn-through method and tune in the wire speed prior to making a spot weld. 2. The PUNCH AND FILL METHOD produces a weld with the most finished appearance of the three spot weld methods. In this method, a hole is punched or drilled into the top piece of metal and the arc is directed through the hole to penetrate into the bottom piece. The puddle is allowed to fill up the hole leaving a spot weld that is smooth and flush with the surface of the top piece. Select the wire diameter, heat setting, and tune in the wire speed as if you were welding the same thickness material with a continuous bead. Maintenance The welder needs the regular maintenance as following: Periodically clean dust, dirt, grease, etc. from your welder. Every six months, or as necessary, remove the cover panel from the welder and airblow any dust and dirt that may have accumulated inside the welder. Replace power cord, ground cable, ground clamp, or electrode assembly when damaged or worn. 15 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder When transporting or storing the welder after use, it is recommended to repack the product as it was received for protection. (Cleaning is required before storage and you must seal the plastic bag in the box for storage MINOR AND ROUTINE MAINTENANCE Store in a clean, dry location away from corrosive gas, excess dust and high humidity. In temperatures from 10eF̢120°F and a relative humidity less than 90%. Trouble shooting Chart Symptom (s) Welder does not work when the main switch is turned on Possible Causes(s) 1.No power input 2. Power cord or power plug is broken 3.Main switch is broken 4.Transformer is broken 1.Incorrect power input 2.Inadequate current at output 3.Poor connection of output cable 4. Dirty surfaces 5. Wrong welding wire Corrective Action(s) 1.Check circuit or fuse of power source 2.Replace power cord 3.Replace switch 4.Replace transformer 1.Check the power source 2.Check for proper grounding to the work piece. 3.Check output connection 4. Clean surfaces 5. Use correct wire Blown fuse or tripped circuit breaker Inadequate fuse or circuit breaker Check the fuse in power source should be 20amp Arc is hard to start 1. Wrong welding wire 2. Base metal not grounded reliable 1. Not enough drive roller pressure 2. Spool hub tension too tight or loose 3. Contact tip worn or wrong size 4. Rusty or corroded wire 1.Use correct one 2.Make sure the connection is good 1. Tighten the drive tension adjustor on wire feeder 2. Adjust the wing nut on the spool holder 3. Replace contact tip 4. Replace wire. Northern 800# Will not weld Inconsistent arc or wire feed Misc Please provide the following: - Model Number - Serial Number (if any) - Part description and number as shown on parts list 16 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder Repair Parts List Reference number Description Part number Qty 1 Left panel 1.1.01.02.0280 1 2 Wire feeder 2.07.40.370 1 2A Drive roller 2.20.09.014 1 2B Roller cover 2.20.09.601 1 3 Fuse holder 2.07.52.005 1 4 Fuse 2.07.52.014 1 5 Control Transformer 1.2.07.02.0036 1 6 Circuit breaker 2.07.80.301 1 7 Spool holder 1.2.01.01.0756 1 7A Rear bushing 2.06.29.301 1 7B Spool baffle 1.1.02.01.0762 1 17 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder 7C 8” spool adaptor 2.05.17.008 1 7D 4” spool holder 1.1.03.01.0050 1 1 7E Washer 1.1.02.01.0799 7F Front Bushing 2.05.17.010 1 7G Mat washer 2.06.17.005 1 7H Wing nut 2.06.05.002 1 Plastic hinge 2.05.05.064 2 8 9 Fan bracket 1.1.02.01.0609 1 10 Fan motor 1.2.07.02.0027 1 11 Fan blade 2.07.89.707 1 12 Back panel 1.1.01.03.0704 1 13 Cable holder 2.05.05.201 1 14 Power cord 1.2.07.01.0050 1 15 Vertical Middle panel 1.1.01.03.0703 1 16 Right panel 1.1.01.02.0281 1 17 Bottom 1.1.01.03.0705 1 18 Feet 2.05.05.016 4 19 Thermal relay 2.07.36.527 1 20 Main Transformer 1.1.04.01.0482 1 21 Handle 2.05.05.042 1 22 PCB Board 1.1.05.02.0168 1 23 PCB support 2.05.05.106 1 24 Front panel 2.05.05.073 1 25 Cable holder 2.05.05.202 1 26 Ground Cable clamp 1.2.08.02.0079 1 27 Torch 1.2.07.02.0935 1 28 Potentiometer Knob 2.07.11.009 1 18 Flux Core 125 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder 29 Indicator 1.2.07.02.0057 1 30 Main Switch 2.07.80.211 1 31 Setting Switch 2.07.80.031 1 32 Cable holder 2.04.31.107 1 33 Door Bolt 2.08.07.803 1 Schematic diagram TR1 24V ~110V Black wire White wire Green wire Other Safety and Standards Information This manual is designed to inform the operator of safety and general use of this model only. For further information about welding safety refer to the following standards and comply with them where applicable. • ANSI Standard Z49.1 — SAFETY IN WELDING AND CUTTING obtainable from: American Welding Society 550 NW Le Jeune Road, Miami, FL 33126 Tel. (800) 443-9353 Fax (305) 443-7559 www.amweld.org or www.aws.org 19 Northern Industrial Welder Operating Instructions and Parts Manual Wire Feed, Gasless Welder • ANSI Standard Z87.1 — SAFE PRACTICE FOR OCCUPATION AND EDUCATIONAL EYE AND FACE PROTECTION Obtainable from: American National Standards Institute (ANSI) 11 West 42nd St. New York, NY 10036 Tel. (212) 642-4900 Fax (212) 398-0023 www.ansi.org • NFPA Standard 51B — CUTTING AND WELDING PROCESS obtainable from: National Fire Protection Association, 1 Batterymarch Park, P.O. Box 9101 Quincy, MA 02269-9101 Tel. (617) 770-3000 Fax (617) 770-0700 www.nfpa.org • OSHA Standard 29 CFR, Part 1910, Subpart Q. —WELDING, CUTTING AND BRAZING obtainable from your state OSHA office or from: U. S. Dept. of Labor OSHA, Office of Public Affairs Room N3647, 200 Constitution Ave. NW Washington, DC 20210 www.osha.gov • CSA Standard W117.2 — Code for SAFETY IN WELDING AND CUTTING Obtainable from: Canadian Standards Association, 178 Rexdale Blvd., Etobicoke, Ontario M9W 1R3 www.csa.ca • American Welding Society Standard A6.0 —WELDING AND CUTTING CONTAINERS WHICH HAVE HELD COMBUSTIBLES Obtainable from: American Welding Society, 550 NW Le Jeune Road Miami, FL 33126 Tel. (800) 443-9353 Fax (305) 443-7559 www.amweld.org or www.aws.org 20 Flux Core 125 Warranty Northern Tool + Equipment Effective Jan 1, 2009 Limited Warranty This warranty applies to the original purchaser and is subject to the terms and conditions listed below. This Limited Warranty is for new equipment sold after the above date, providing coverage for defects in material and workmanship at the time it is shipped from the factory. Limited to the warranty periods listed below, Northern Tool + Equipment will repair or replace the item under warranty that fails due to defects in material and workmanship. Northern Tool + Equipment must be notified within 30 days of the failure, so as to provide instructions on how to proceed with the repair of your welder and warranty claim processing. Warranty period begins at the time the welder is purchased from Northern Tool + Equipment. Warranty Periods Limited Warranty is divided into four categories: No warranty, 6 months, 1 year, 2 year. No Warranty Normal wear items, MIG gun parts (contact tips, nozzle, adapter, MIG gun liner), drive roll, electrode holder, are not covered under warranty. 6 Months Parts and labor performed by authorized repair center with original equipment repair parts 1 Year MIG gun parts (except those listed under normal wear items), cables, regulator. 2 Year Includes: transformer, reactor, rectifier, solenoid valve, PC board, switches, controls, gas valve, drive motor, drive system. Northern Tool + Equipment Co. 2800 Southcross Drive West PO Box 1219 Burnsville MN 55337
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