Need wiring schematic for miller 140 wire feed welder
Looking for spool gun connector parts, part numbers, schematics. The parts directly associated with the mig machine itself. Not the spool gun. Miller matic 140 mig welder without autoset feature specifically.
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first unscrew the tiny tip at very end of torch (can be hot)!! then try to feed wire thru handle,gently shake cable as you do helps to feed wire thru cable , if successful you have allowed the amps to get too high for the feed rate (slow) and melted the tip closed , these tips are replaceable from miller and are not expensive
If its a new unit its probably nothing. Miller makes good stuff. Open the side so you can see the spool. With the machine on, press the trigger for a second. Did the little wheel spin (trying to feed the wire) if it did then your problem could be kinked wire, **** on tip, or spring on small spool is loose and wire is slipping. Let me know.
Hi there, If the knob spins all the way around (and especially of it didn't always do that), it's broken. This could mean that the nut that holds the rheostat in place has come loose, or it could be that the wiper inside the rheostat has broken off the shaft. To find the voltage measurements, correct schematics, etc, I'd need to know the serial number of your welder.
A schematic would certainly help, give Hobart a call and ask for a wiring diagram. or manual. Hobart are very helpful and may even give you guidance, you may have to pay the postage, they usually fax these documents so it will not cost you anything.
You are talking about the 2 white wires that come out of the gun and conect to the welder right? You are also talking about the wire that runs off the spool though the gun? Well if not this will not help you but if you are then it is the solution. The gun slides through the hole in front of the welder. inside there is a butterfly screw that needs to be loosend to allow the gun end to go in all the way. you tighten the screw back down after (welding whip) gun is installed. after that if you look inside the welder at where you just did the work to slide the gun in. You will look above the whip and see two prongs that are sticking out to allow the 2 wires to slip onto the conection. It should not matter which wire goes on which tab but both have to be connected. After that then turn on the welder and squeeze the triger for a second and the wheels on the inside of the welder should start turning. Now shut off the welder and unplug it. After you install the spool you will notice two rollers. Well on the left hand side of the rollers you will see a kind of handle / nut at the top. you should loosen the nut a few turns and be able to slide it to the left until it pivots down and out of the way. now you should be able to pivot toe top roller up enough to get the wire in there. Take your wire and carefully run the wire through the rollers and into the gun. Only put in about 6 inches or so of the wire. Now you lay the top roller back down and make sure that the wire is in the groove of the roller. After that is dont then pivot that retaining bolt back up to hold down the top roller. If it feels like a hard thing to do then loosen the bolt cap a little bit more to allow for the wire size. Now tighten the retainins screw just a little bit once you put it back into original position. After this make sure that you do not have a welding tip or nozzel on the trigger side of the gun. Now plug back in and then turn welder back on. keep the welder whip as strait as possible.Extended from the machine with zero loops in it. it is alright to bring it back to the side of the machine so as you can see what you are doing. Now squeez the trigger and the rollers should start moving. If the wire roll is not feeding wire into the gun then that nut that holds the roller down needs to be tightened up just a touch. Sqeez the trigger again and see if it despences the wire. if it does not then tighten and repeat until it does. DO NOT OVERTIGHTEN! That will flatten or crush the wire wich will wear out your internal gun and you rollers. Use the least amount of presure that you can to get the wire to spool into the gun. Well that should do it. If that is not the solution you are looking for then let me know and I will see what else I can come up with...Good luck....keefers
If your welder is less than 3 years old your local Miller authorized service center will repair it for FREE. They can also check the serial number of your welder over the phone to see if it is still in warranty. For goodness sake DON'T tell them you've been mucking around inside the welder or they won't be able to help you. That said, if the welder spins the feed wheels without any wire between them it probably isn't the board. There is the switch in the gun, the board, and the motor and brake assembly all needed to feed the wire.