View Full Version : Ln-25
06-17-2006, 02:15 PM
does anyone know if there's a difference in using a lug and just clamping the stinger to it, and using the 14 pin connector on the ln-25. Also is my voltmeter on the front of the ln-25 supposed to be pegged whenever it's on?
06-17-2006, 03:49 PM
Do you have the solenoid/contactor model, or the one without? All my experience is on the non-contactor model, so I don't even have a remote for mine, just the welding lead lug.
06-17-2006, 04:02 PM
I don't have the knob at the top left or the bottom ones if thats what you mean. I'm really not sure.
06-17-2006, 06:02 PM
Did you get a new one? Do you have the owner's manual? You can get it here: http://www.mylincolnelectric.com/Catalog/lecooperatorsmanualsearch.asp
06-17-2006, 08:23 PM
If you don't run into a resistance problem there shouldn't be a problem with clamping the stinger to the lug out the back. I'd watch to see if it heats up though. I don't know of any 14 pin connectors on the Ln 25 The plug in on the front of the machine is for your gun to plug into. We run our feeders off of Sam 400s and Sae 400s, If you don't switch all the toggle switches over to constant voltage it will peg the volts. If you try to weld like that it usually melts the wire clear though the tip
I don’t recall ever seeing an LN-25 feeder with a 14 –pin Amphenol plug.
The analog voltmeter on the LN-25 just shows the DC arc volts, or open circuit voltage (OCV) when you’re not welding. OCV will often be higher than the 40VDC range of the meter, so it is very common to peg the meter when the system is on, but you’re not yet welding. It does no harm.
(The OCV on Lincoln chopper machines is 58VDC or higher. As soon as the machine senses current in the weld circuit, the voltage drops to the level set on the panel. If you are using the LN-25 on a CC machine, the actual OCV could easily be above 80VDC)
Just clamping the stinger to the input cable of the LN-25 is probably done often, but as with any other welding conductor it must be a good solid connection. You are probably better off with a bolted connection or a good quality welding cable quick-connect device.
OOPS! looks like Spuddown beat me to some of these points. Here's my 2 cents worth anyway.
06-17-2006, 08:48 PM
I did buy a new one, and didn't get a book. thank you for the link. I'm running it off of a new ranger 250. If I understand correctly all the contactor does is to make the wire cold until the trigger is pressed. If so then mine has that. I'm confused on the 14 pin thing though.
Several Lincoln feeders, like the LN-7 use a control/power cable that plugs into the 14 pin Amphenol on the front of the Ranger 250. An LN-25 with a control cable of any type is somewhat rare, and I have never seen one with a 14 pin Amphenol connector.
That Ranger 250 will indeed peg your meter until you start to weld.
06-19-2006, 05:28 AM
The guy at the welding supply place told me he could put a 14 pin connector on it or just a lug. The lug was a whole lot cheaper, so I didn't question it.
I'm guessing there may have been a misunderstanding. He was probably thinking of something like this. http://store.weldingdepot.com/cgi/weldingdepot/scan/fi=products/st=db/sp=results/co=1/sf=category/se=Cable%20Connectors%20&%20Lugs/op=eq/nu=0/bs=1/ml=9/tf=description/to=x/se=1/sf=inactive/op=ne/sf=tax_category/se=1/op=eq/va=banner_text=/va=banner_image=.html
The only 14 pin connectors I know of connect control wiring, not weld cable.
06-19-2006, 09:26 AM
[QUOTE=littlefuzz]The guy at the welding supply place told me he could put a 14 pin connector on it or just a lug. The lug was a whole lot cheaper, so I didn't question it.
Does this Ln25 have a voltage adjuster on the machine? I know some have that option although I've never seen one with it. They would have to have a plug to the welder to make this work.
06-19-2006, 10:56 AM
I don't have that option, that maybe what it's for. I don't know.
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