how can I vary amp settings on a welder. Lincoln 225 AC?

I have a Lincoln AC 225 welder. I would like to be able to vary the amp settings between the set stops that are on the welder now. Any one know how I can do this?

Asked by Geo56 3 years ago



I have a hobby mig welder. How do I fix it ?

I have a hobby mig welder it seems feed wire fine and the gas flow is good but when the arc is struck it sputters as if the power source is low. How do I fix it ?

Asked by chs247 9 years ago


Will this capacitive discharge welder design work?

I am planning to build a capacitve discharge welder so that I can tab weld my battery packs, and I have no intention of paying 2K plus.  I recently came across a fairly simple design, and was using it to design my own.  If anyone that has built one of these, or knows how to, can look at this design in detail, and inform me if I have the right componants, and in the right order, it would be greatly appreciated  *** Please, I know the dangers and risks to what I plan on building so please do not express your concerns here.  Everything has risks, but without risks their can be no reward.*** UPDATE I added a new diagrahm with the opto-iso and relay that you two recommended, not sure if its right yet, but its a work in progress

Asked by supramp 6 years ago


Re wiring the secondary transformer I could not give it 20 turns. I ran out of space.? Answered

I am trying to build a welder from microwave transfomers. I started using 10 gage solid wire but I could not fit 20 turns as suggested. If I use the stranded wire will I be able to fit the 20 turns? Do bigger transformers come with larger holes or they are the same size? Any suggestions and/or answers are appreciated.

Asked by taino1 8 years ago


Is there a way to convert a generator into a arc welder? Answered

Is there a way to convert a generator into a arc welder?

Asked by stevnmilr 9 years ago


has anybody build a stitch welder?

 i want to replace the batteries of my power tool and stitch the batteries together.

Asked by rickyt 8 years ago


small hobby resistance/spot welder?

I want to weld small steel wires (the size of guitar strings - +/_ .035) to make small sculptures. Solder works, but is not fast or strong enough. Can I make a welder to run on 115VAC?

Asked by Dweevil 8 years ago


how can I convert an ac welder to a dc?

I have a microwave oven transformer welder that I made and it works ok, but I woul like to convert it to dc. Any information will be appreicated. Thanks

Asked by sakimoto 7 years ago


can you turn your wirefeed welder into a plasma cutter.

Can you turn your wirefeed welder into a plasma cutter.  if you replace your gas line with an air line  and connect the cables to the  ,- terminals?

Asked by smackit 8 years ago




what is the safest type of welder?

Exactly what the title says i know they are all dangerous but which is least dangerous and what about those homemade ones with microwave transformers or the one with batterys and jumper cables

Asked by BIGHAIRYDUDE 7 years ago


one transformer wire that i rap melted, the welder was working fine until this happenned what went wrong?

Welder was working fine then i seen smoke coming from one of the transformers, the insulation melted off the wire that i rapped, what did i do wrong????

Asked by boomer75_75 9 years ago


DIY water cooler for a tig welding torch

I purchased a tig welder and it came with a water cooled torch,but Idon't have the water cooler to cool it.Can I DIY a simple one?

Asked by knowhow69 1 year ago


My Grandpa has a Lincoln 225 Stick Welder but it is really beat up. Is it worth trying to fix? Answered

I mean it has bad cords and I don't even know if it is worth it. Is it possible to get shocked even though it is not plugged in if I open it up to look inside?  I could get new cords and stuff if the internals are working. I was going to hook it up to a power strip ( the one with a switch) so I could see if it works. But Im nervous, is it worth it?  If not i was just going to use the case for something, a refrigerator on the inside with all the inside stuff taken out of the welder itself.

Asked by bobthebuilder728 5 years ago


reverse test repair circuit boards?

Need  good procedures on repair (locate defective parts) without board schematics.....Im a welder tech and many board schematics are withheld by oem's...i need a good tutoral,thanks,joe

Asked by n2diesel 7 years ago


Trying to build a Alternator/generator welder?

Ok im trying to build a Alternator/Generator welder. i want it to be able to do Stick, Mig, and Tig. So other words three different circuts on one board. so i can switch between the three. 1. how should i control current: in between the battery and field post or after from the positive post from the alternator? 2. how to control the voltage: same as number 1 between the batt and field or from the batt post on the alternator? Also i understand the consant current constant voltage thing. that will be provided on the three circuts. Right now im just working on the stick welder circut ill ask about the mig and tig circuts later or you can pm if you have any info on them. im just trying to piece this togeather step by step. Any help will be great. and yes i know this is a very big project, and will require alot oof time to do.

Asked by dmm1542003 5 years ago


the welder with sunglasses

I just ran into this interesting post of an italian woman living in Addis Abeba: https://ferengiaddis.wordpress.com/2010/09/21/il-saldatore-con-gli-occhiali-da-sole/ Since it's funny and explained with humor I wish to share it with you: I can of course translate it into English ;-) "The welder with sunglasses Today a man came to weld our gate, because it had come off a metal rod. He came with a wheelbarrow containing the tools of the trade: a hammer, a few pieces of iron and a welder. This one! https://ferengiaddis.files.wordpress.com/2010/09/saldatrice.jpg When I saw it I ran home to get my camera, deeply convinced that the entire operation had to be documented; and in fact I was not wrong. To connect the welding machine to the wall socket of my living room there was no extension cable. But here no one lose heart for so little: only took a few lengths of electrical cable connected to the least worst and fixed with a few pieces of cloth and the problem is solved. https://ferengiaddis.files.wordpress.com/2010/09/prolunga.jpg Of course, such a link at the end did not have a plug to be inserted into the socket, and when I pointed it out the welder looked at me with pitying air, and carelessly shoved the two bare wires in the little holes in the wall. https://ferengiaddis.files.wordpress.com/2010/09/presa.jpg Only a few sparks, but in the end it worked out great, the welder has completed its work smartly wearing a pair of sunglasses as protection, the power went out just three times and the gate is as good as new. Just for the record, the wall socket is now a bit melted..." I wish there will be many authors here like that "welder with sunglasses" ps: don't try that by yourselves!!

Posted by andrea biffi 3 years ago


Welding Transformers in series. How close can they get to one another?

Building the microwave transformer welder. Is there a distance that they need to be from one another? One site said they need to be 5" from each other. Some youtube vid said they can't be aligned in the same direction and has to be 90 degrees turned.

Posted by eric m 8 years ago


how can i but a foot petal a tig wielder that did not come out with one?

The wielder is a chicago weiding system 240 volt ark/tig inverter welder and tig welding torch modal 66787. 10 to 130 amps.as I said it did not come out with pedal is there anyway to wire one in to it?

Asked by bikerdad 5 years ago


Computer UPS backup transformer into an welder OR spot welder ??????

I have some transformer from my UPS. i want to make it welder.. watch this videos.. Do not talk about microwave ovens transformers . i don't have microwave transformer. can we make it ??? 

Posted by ishan udyoga 4 years ago


will build home made welders

Welders for sale THE VERY BEST HOME MADE WELDER this is the best welder, its so good that I would like to offer, to build one for you. look at the photos, the photos are not the best, but they show the basic setup, when I send it to you it will come in a metal box like any other store bought welder, I WILL ONLY SHIP THE BEST, this welder can weld up to half inch, with good penetration, NOT A TOY ...... there's also a picture I had drawn up for you to so you know I want it to look like. also I would like to tell you that since I am building a box for mine, I think that building another , at the same time would be best, thats why I have waited, do remember I ONLY SHIP THE BEST TO YOU! THE PRICE IS $70 DOLLARS if you think thats too much, go look at welders at a store, that can do as much as this one! then you'll know this is a very good deal! IMPORTANT this welder uses 3/32 welding rods,I will send you some rods so you can have some fun as soon as you get it , it can be modified to work with 1/8 rods , just buy adding another transformer, tell me what you think, at KNOWHOWDANIEL@YAHOO.COM and thats not capitalized if you don't think it possible I will LAUGH! AT YOU! HA written by Daniel Rosenthal Experimenter, scientist, etc.......

Posted by Danielro10 10 years ago


How to choose the right capacitor for Harbor Freight AC Welder to DC Welder conversion? Answered

I'm watching this series of videos about improving a cheap harbor freight welder. Right now the step is converting the AC to DC. It seems like the guy is just using whatever components he has laying around or that are the cheapest but I want to make sure to get the most power as possible. Here's the AC to DC conversion video:  https://www.youtube.com/watch?v=NoYN4vx1WU8&list=PLd_DTtq1stJJ4C0qlUnxqBvrfLXLKDyYr&index=1 Here's a link to the Harbor Freight page with the welder specifications: https://www.youtube.com/watch?v=NoYN4vx1WU8&list=PLd_DTtq1stJJ4C0qlUnxqBvrfLXLKDyYr&index=1 It says on the specifications page that the open circuit voltage is 26 volts, does that probably mean that that's the max output voltage at which the welder operates? Anyways, here are my questions: 1.Can a capacitor be fully charged by a lower voltage than it's rated for? For example, the modification in the video uses a 50V capacitor to store charge from the transformer of the welder, which I'm assuming is a 26 volt or less source. Will it still reach it's 46,000 microfarad charge storage potential or does the charge storage potential vary based on the charging voltage? In which case could the capacitor store more charge at a higher voltage, a lower voltage, or wouldn't it make a difference? 2.For the rectifier, assuming the max output of the welder is 120 amps at 26 volts, I am thinking that the guy in the video should have used a rectifier rated for at least 120 amps, probably somewhat more than that to be safe. But instead he is using a rectifier rated only for 100 amps at 1600 volts. That's it. Basically what do you think of the modification. Are those components in the video adequate, the rectifier and the capacitor, or if doing this modification would you have selected different perhaps higher rated components. I have a habit of thinking that I'm too smart to follow instructions exactly and then wondering why things go horribly wrong when projects, recipes, etc. don't turn out.

Asked by avocadostains 2 years ago


Hydroxy welder from hard drive platters.

I've seen and built HHO generators before, and have been able to build a rig that produced a flame big enough for welding... before it fell apart. But I'm having trouble with the funds and time to get thinking and do some real engineering. To put it simply i've hit a brick wall with this idea and i thought Instuctables.com might be a good place to discuss my problems and get other people thinking too. my plan was to create a wet cell hydroxy generator with hard drive platter, why hard drive platters? because they are plated in platinum.... the best substance known to man for electrolysis. I just want sombody to share my ideas with that wont say somthing like " uhhh what's a hard drive?". Please help, I'd love to get info and opinions from sombody other than google once in a while.

Posted by fasterthanfalcon 3 years ago


Need Help With A Mini Spot Welder

I've been trying to gather information to build a welder for a special application. The use is for welding the commutator tabs and magnet wire that passes over them for small DC motors. While there are specialized and often automated welders made for this purpose, they are both large and very expensive and really intended for industrial users. I have been able to get small bits of information as to how others have done this, but it's been difficult to get the whole project laid out (there is apparently some "secrecy" involved here!?). The materials being welded (soldering isn't a preferable way to make this connection...these motors run hot and very fast) are the brass commutator tabs (approximately .030" thick material about .060" wide formed as a "U") and the copper magnet wire used to wind the poles that then passes over each brass tab...from #23 awg to #28awg. From what I've been able to gather, people have done this on a "homebrew" basis using 6V automotive battery chargers/starters that can deliver around 30 amps or more. I have very little knowledge of electronics and none at all about welding and circuit design, but am looking for information on how I might proceed after sourcing the charger/starter. I'm guessing that the "negative" cable would be adapted to use as a clamp at the commutator and would also double as a heat sink to prevent damaging the commutator and that the "positive" cable would somehow be adapted to hold some sort of fine rod that would touch each com tab to complete the welds. -Maybe a footswitch could or should be used to start/stop the weld? -Is the positive cable simply used to hold a rod for the "spot weld"?, or are there other pieces that need to be added? To my mind, it would seem that simply touching the positive to the commutator tab to make the weld and complete the circuit would simply trip a breaker at the panel or any protection device on the charger(dead short!?). -Any other information or thoughts? Thank you in advance -john

Posted by havlicek 9 years ago


How to limit welder current (heat)? Answered

Hi All, I admit to being electrically dumb, well one step above dumb, I'm a software engineer not electrical engineer, but I don't even know enough enough to be dangerous yet:) I'm going to be converting an ac welder to dc. It's a harbor freight 90 amp flux wire job, comes from the factory as AC for some unknown reason, but should be DCEN for FCAW welding. There are several walk throughs availabile online. I don't know the rules for linking to other forums, so I won't post a link, but you can google 90 amp welder dcen conversion if you want details. I attached an image of the circuit I got from a post by bluecatfish onweldingweb. I'll be taking the transformer output, running through a full bridge rectifier to convert to rippled DC, using capacitors to remove ripple, and lastly running through a torroid inductor. Another problem with this welder is it only comes with high/low power settings. The low is still too hot and burns through thinner metals.  I want a way limit current further, but maintain voltage for a stable arc. I'll be adding a bleeder resistor to drain the caps, which gave me an idea. At first I thought to use several more resistors in parallel with the bleeder to reduce current. I imagine this might work but be horribly inefficient. It would still use all available power from the supply, just converting some of it to heat, leaving less power for the arc. I've read that adding resistance in series will reduce current, but won't that drop voltage available for the arc? Then I was thinking, I have a motor speed control for a router. I believe this is a pwm. Could it be used to chop the mains input (120v 20a) to the transformer and reduce overall output without effecting voltage(I've read this is 38v 80a in the factory state before my mods)? since I'm adding capacitors downstream, will they just discharge too fast leaving me with ripple/pulsing? If so, how would I slow the discharge rate? (I'm looking at 3x or 4x caps 22,000uF @65v in parallel on a bus bar, so 66,000 or 88,000uF total). Sorry if in not making sense, as I said in the intro, I have a lot to learn, and right now, the more I read, the more confused I get. Edit:  After more research, and to hopefully use correct terminology, I think I'm talking about using a current divider when referring to multiple resistors in parallel to the welding leads. I think I'm referring to a switching regulator when I suggested using a pwm to chop the transformer input. Can either of these work like I'm hoping? Is there a better way, that is relatively simple?  Thanks in advance for your patience and help. 

Asked by DonaldF9 2 years ago


See On Board Compressor/welder for a vehicle. Can 2nd alternator be eliminated?

This instructable relates to this question . I can see the need for a second air conditioning compressor for that part of the build. With the alternator however, there is one under the hood already. Why not hack it to do two jobs. Couldn't you just add back in the alternator parts you disabled in an external box and then with some wire and switches, alternate back and forth between welding and charging. The car can run off the battery for a while, so this should work. Part 2 of this question is, the alternator in my case is in a Toyota Corolla. Toyota makes pretty tough stuff, however will my alternator make nearly, or as much juice as the Ford unit the guy recommends for the hack. I could swap in a Ford alternator I suppose, however it would likely require significant work to adapt the mounting bits. Thanks for Listening, Zipperboy

Asked by zipperboy 9 years ago


Stick welder? Answered

Can a stick welder be used for this corse?

Asked by DanE77 1 year ago


hf welder ? Answered

Can i use a HF welder ?

Asked by agguilar 1 year ago


Home made welder?

I have a transfomer that appears to be wound with an aluminum winding. Is  this aluminum and will it be safe to make a welder out of?

Asked by DWA 6 years ago


Backpack Welder

Check out this awesome backpack welder; I saw it in a Farm Show magazine.  It would be fun if someone made an Instructable of one of these.

Posted by robbtoberfest 8 years ago


What is the duty cycle of a welder? Answered

Is a 6% duty cycle good? Bad? Terrible? Worth blowing up?

Asked by bowmaster 8 years ago



Is there a guide to building a 3-phase AC welder?

I was looking through the MANY guides on the web for weldernators and I'm in the midst of putting it together. It suddenly occurred to me that my dad used to own both 5 and 3 phase AC welders and I thought "wait a minute, an alternator is 3 phase AC". I searched and searched but I'm doing a lot of searching on a smartphone because of a really long couple of work weeks, plus I suck at Google apparently. (If I wanted to buy one I could find that.) Anyway, I'm just not sure of how a 3 phase AC welder works. Maybe it just turns it into DC. They were just arc welders anyway.

Asked by Andale_The_Great 7 years ago


Flux core welding wire any good? Answered

Im looking at wire feed welders but I don't want to screw around with gas, So is the gas less flux core wire any good??

Asked by camping crazy 3 years ago


how do i wire a dual altenator in a 91 jeep wranglr for a onboard welder?

I already installed the second alternator i have a dual battery setup with one battery taking care of the jeep and the second battery powering a winch and air compressor i want the second alt to run the second battery and the welder but i dont know how to wire it up i have a ultima externaly regulated alternator help would be appreciated

Asked by chikenjojo 6 years ago


AC MOT Welder Voltage Issue

Hello everyone, I've been working on an arc welder based on instructables like https://www.instructables.com/id/Small-110-volt-arc-welder-NYDG/ but I need some advice. Most tutorials on here suggest two paths to success, either winding two MOTs with as much 10 gauge wire as possible, hoping that the voltage output in series will be close enough to 40V, or using multiple small transformers, also in series. The problem is, all this series stuff really cuts down on the available amperage, so I'm wondering if there's a different way to get high amps and volts simultaneously (obviously without surpassing the available 2400 Watts, energy in = energy out). I think I have a way to make two MOTs which run at low voltage but high amperage also have high voltage. I've made a high frequency circuit to assist in starting an arc, which you can see attached (it works phenomenally, and I've been able to make it run on 1 amp). Since the output on the HF part goes through a torroid at the far right (where it meets the welder's output), would it be possible to wind the torroid with, say, 5:20 turns, to basically take the 120A (10.8V) I get from the parallel-connected MOT transformers and overlay a low-amperage but higher voltage on it, to make arc start/run easier? The welder just won't run at 10.8v, so other than rewinding the secondaries, what about jumping the voltage up a little via the output torroid?

Posted by reakter 5 years ago



MIG NO GAS WELDER ? Answered

What about the MIG welders that don't require gas? Like those @ Harbor Freight?

Asked by access100 1 year ago


arc welder/spot welder? Answered

Can an old small arc welder be used to make a spot welder? It's a 60 yr. old Grindl. A stamping on it says input amps 20, sec. amps rated .80- 80, welding volts 20, max open cir volts 80.

Asked by hjones47222222 3 years ago


What about flux core non-gas wire welders? Answered

The cheapest wire welders use flux core wire and have no shielding gas. Are these welders worth considering?

Asked by Doug Paradis 1 year ago



Flux wire welder ? Answered

I too have an inexpensive flux wire welder. Isn't it very similar to Mig welding the flux taking the place of gas?

Asked by billd421 6 months ago


Plastic welder.

Need to purchase one for automotive related purposes. Airless?

Posted by gnarlycreature 11 years ago


Can a stick welder Weld aluminium ?? Answered

My dad has a mig welder and i dont want to buy a gas kit for that so ive been thinking of buying a cheap stick welder WIll it be able to weld aluminium angle or box aluminium

Asked by stephenniall 8 years ago


Ok, so MIG welders cost THOUSANDS... (Miller MIGs anyway)? Answered

Why not a class for the more affordable and common stick welders???

Asked by bobbydee 1 year ago


do welders of any and all types interfere with implants such as defiberlators and or pacemakers ?

Do welders of any and all types interfere with implants such as defiberlators and or pacemakers the doctors say yes they can and will but the companies say they can not ever interfere or reset settings?

Asked by rayfalcon 9 years ago


cheapest welder for aluminum?

I need to weld 3/16" sheet aluminum for a boat i'm making and want to do it at the cheapest cost. this welder (http://www.harborfreight.com/90-amp-flux-wire-welder-68887.html) says it won't do aluminum (and i'm not sure 90 amps would be enough anyway). Is that true? What if i bought the 180 amp model? Any suggestions for other welders?

Asked by ridecruz88 6 years ago