WE OFFER SOLUTIONS FOR YOUR MACHINE PROBLEMS
Come to us for more than just parts; we offer real help and information from a real, live person with experience. We are dedicated to going the extra mile to assist you.
Troubleshoot Your Lincoln AC Exciter Frame L6061-X/ L6795-1 (Or Any Lincoln machine with an AC Exciter
I have been working in this industry since 1971, and I have a love/hate relationship with
Lincoln Electric. I admire their engineering, particularly the design of the older DC machines. These machines were created in a time when calculations were made by hand, without the aid of computers, and I’m sure a lot of guesswork was involved in the process. They worked!
The basic technology of a standalone alternator, producing constant-current AC
voltage, rectifiers, and is fed into a shunt coil to produce current using an engine-powered dynamo. The arc voltage has two "controls": 1) the "fine current control" (misnamed, but it still works!) and the arc length of the welding rod to the metal, controlled by the welder.
I have always admired Lincoln Electric's engineering, both mechanical and electrical. Engineering is one thing; mass-producing a product is another. The AC frame wiring is "old school," but it works very well. Don't screw with it; we use the best copper wire, no paper insulation, and a final seal coat of epoxy. The P/N L6061-X is the basic design on all Lincoln engine drive welders that produce auxiliary AC power. If you have a water-cooled Lincoln engine drive with AC auxiliary power, these rewound housings should work. If you have any questions, please call us. Let's keep our mistakes to the ones that are easy and inexpensive to rectify.
The failures in these are always windings losing resistance or opening up. The schematic below shows the exciter windings. There are larger red and black wires, with a white wire known as a center tap. These stator windings produce the AC auxiliary 240/120 volts.
Find the black, red, and white wires exiting the excisor housing bundle. Normally, the red and black wires are slightly larger than the white wire.
1. Look for the white wire first. It will come out of the bundle and go to the common ground on both the 230 V and 120 V outlet sockets.
2. Look for the red wire next. It comes out of the bundle, and it goes to the 230 V 30 A fuse holder.
3. Lastly, identify the black wire. It comes out of the bundle, passes through the sensing transformer mounted on the side rail, then exits and goes to the 30 A 120 V fuse holder.
To electrically check these windings, we recommend cutting the wires exiting the stator housing at a point where they can be easily spliced back.
`1. Wires red to black going into the stator housing should be 0.5 ohms, plus or minus 10%.
2. Wires, red to black, should be one ohm total resistance, plus or minus 10%.
3. Wires white to black should have a resistance of 0.5 ohms, plus or minus 10%.
4. One last check. Put your meter on the highest resistance range you have, and between each wire to the frame ground, you should have infinite resistance.
These winding resistances are very low and critical. In our experience the value change of +/- 10% is critical. Between red and black 1 ohm +/- 0.1 ohms. You need to cut these wires, leaving enough length to splice them easily. Strip them back enough to check the resistance. This is where a good VOM meter is necessary. These coils have very low resistance. Clip the leads to the wires, and let them sit for a minute. The DC coming from the meter takes time to saturate the windings, and when the temperature is 70' F or higher.
`If you have doubt about your reading, compare it to a good analog VMM.
%20copy_edited.jpg)
Simpson 360, known in our shop as Mr. Simpson, has the final word. Any doubt, Mr. has the final word!
Order here to be directly applied to your Amazon account.
Simpson 360, known in our shop as the California Version or Mr. Simpson's" gay son, has the final word. Any doubt, Mr. has the final word!
Order here to be directly applied to your Amazon account.
Triplett model 310-Tel, this is the go-to meter I carry in my tool pack. You can add a clamp-on amp meter,.
Order here to be directly applied to your Amazon account.
Why You Should Invest Your Hard-Earned Money in a Weldmart Rewound Exciter Frame?
1. It;s expensive. You only want to do it once!
2. They are obsolete from Lincoln, but only carried a 1-year warranty if replaced by an authorized, certified, sanitized Lincoln Service Center. The machines are older than the tech!
3. Weldmart warrants our rewounds for 5 years from the date of purchase by the original customer.
4. Weldmart warrants our rewounds for the life of the original customer. It fails you. Please bring it back. We want to know why.
5. We have been selling and installing these frames for over twenty years, no claims!
How to Order a Rewound a AC Exciter Frame?
In our opinion, this is too big a purchase to make blindly on the net.
1. Call our office, about 25% of my customers looking for an exciter housing, have other problems, not their exciter.
2. If we sell you, we need your core (it is not available anymore. and your code number.
3. We'll send you a rewound exciter frame in a wooden crate. You will be charged a core charge and a box charge. Put your core in the box and send it back to us. We will refund your core and box charge.
4. Call us, we want to talk to you. Don't forget your code number.
