welding a motorcycle?

I know how to weld. How to weld on a motorcycle?does the battery terminals need to be removed and what other electric components need to be removed so they are not damaged from the increased voltage running through the frame when welding?

Question by 103curly   |  last reply


need help welding

I have a 1970 HT panelvan which i am restoring. I have replaced a floor panel but i cannot get the main undersuport panel to take to the new floor panel i have cleaned thw paint off the area need and clamped it tight. I drilled holes throught the support panel and gave plenty of weld but it did not take in any area why is this happening can anyone help

Topic by wayneavery   |  last reply


Arc Welding Advice?

My father-in-law just gave me this 295 amp arc welding rig (he's forbidden to use it anymore--pacemaker.) It's complete with mask, rods, etc. I've never welded before, and have a couple questions:-- Any good books or tutorials to recommend?-- I live in an older home (1930s), which has bus fuses and certainly can't supply 295 amps without burning out (or down.)Should I get a separate service installed for the garage? Is it expensive? I've looked on the power company website, and it's typical superficial information for the average customer...

Topic by gmoon   |  last reply


Is it possible to 'weld' polymorph? Answered

I've ordered some polymorph (shape lock, friendly plastic) so I'll be able to try it myself in a few days, but I was wondering if it's possible to attach (for example) a polymorph rod to a block by heating a spot with a pen-torch and hot air attachment then pushing the rod against it?

Question by AndyGadget   |  last reply


welding mask LCD?

Ok i have one LCD from a welding mask and i need another. What i want to do is basically make auto-dimming glasses. I want this particular type because all i have to do is apply a few volts and the entire thing will dim, it makes things simple. Can someone please tell me where i can buy some if anywhere. Or give me a suggestion as to what else i could use.

Question by OverSaltedFry   |  last reply


where are there classes to TIG weld?

Question by raygonzo25   |  last reply




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.

Question by hjones47222222   |  last reply


Wireless TIG welder foot pedal?

Has anybody ever heard of or created a cordless foot pedal (remote) for tig welding? I hate having to buy new foot pedals for our Miller Synchrowave TIG/ Stick when the power cable gets cut or burned through. Thought about "bluetooth" signal.

Question by bobhdus   |  last reply


Can a ARC WELDER be converted to a SPOT WELDER?

I have this ARC welder which puts out 50 AMPS, flip the switch gives you 80 AMPS. I would like to spot weld thin metals for a project i am working on, and by all accounts on what iI have seen on the INSTRUCTABLES all I would need is the copper tips attached to the clamp device

Question by yeagerxp   |  last reply



How much voltage and current used in Arc welding? Answered

How much minimum  voltage and current is required to make arc welding?

Question by Rajkumar2506   |  last reply



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?

Question by ridecruz88   |  last reply



Joining two small pieces of metal with a metal cylinder tube

Hi, this is my first post, I hope that someone will be able to help me :) I am trying to join two motors normally found in alarm clocks, I wish to join them with a metal cylinder with about a cm bigger diameter than antenna's found on radios. How would I go about joining each motor to each end, I cannot get welding and don't know if it would apply even to such small electronics, soldering seems impossible as it won't join, any advice is much appreciated, thanks P.S The end product would look like the base of a RC car, but without the wheels thanks.

Topic by thewhiz012   |  last reply


how to bypass the safety on a battery charger?

Ive been working on a cd welder for battery tab.. very simple car audio capacitor with a battery charger. today i rebuilt the whole thing with new leads wiring and new battery charger that will shut off when it hits a full charge. now it wont charge at all because it apparently wont charge anything thats not a car battery with proper voltage already existing. since the capacitor dumps the charge and leaves nothing, the charger just thinks there is nothing there. can anyone give me a crash course in float chargers and how they work so i can single out what i need and bypass everything else

Question by snowfox222   |  last reply


diy welding mahine cable size?

Hi guys i wanna make a welder. i checked https://www.instructables.com/id/Making-an-ARC-Welder-Part-1-of-2/ there the king uses 8 awg copper cables for the winding of the transformers.  here (namibia) they seem to have only 6 or 10 sqare mm cables. can i use 1 of those?

Topic by kefflon   |  last reply


convert bicycle to recunbent without welding? ?

Convert bicycle to recunbent  with out welding take parts of 2 or more bikes too make 1 bike

Question by zzjoev   |  last reply


Can a stick welder Weld aluminium ??

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

Question by stephenniall   |  last reply


welding cast iron to mild steel

Welding cast iron to mild steel is for the most part done with ornamental iron such as gates and fences. the ornaments are typicaly cast iron such as spearpoints and fit over the top of what ever square tubing size ect you are working with. If you weld say with a mig welder in the normal mannor you rweld will cold roll and ball on you leaving a poor appearance that you will have to spend time grinding to make look good. Fortunatly it is not a matter of strenght or how much penetration ect. It is just ornamentation but must look good. Now take your mig welder with say 035 wire and use pure argon..(less spatter). Turn your welders heat up somewhat past what your normanl setting would be for what ever thickness you are using. Use breif spot welding like techniques overlapping as needed. You will find that this makes a good wash bead with no undercut or cold roll. The argon gas helps to keep down all the extra spatter welding cast iron to mild steel seems to cause. Larger peices such as caps for say 4by4 gate posts or fence posts, i preheat as uniformely as possibly to just under cherry red then weld as described. It welds badly because cast iron is actualy dirty, literaly with particles of dirt in the cheap castings, wich the ornaments are. Not haviong the need to be anealed or nodular for instance. If the welds are not going to show then you dont have to do this. It will still weld, just do not expect the clean perfect welds you are used to.  And NO I do not have PICS AND I dont own a digital camera nor do i know how to use one let alone put them on a computer.

Topic by beserker   |  last reply


Thermal conductivity of two welded plates?

I am in the process of building a wood stove (details on FE Blog) mainly from scrap metal, but I have got it into my head that a stainless steel hotplate would be nice. I wanted one 10mm thick, round with a diameter of 390mm. As it turns out 6mm seems to be a bit of a threshold for stainless, and anything over has to be laser cut or similar and is loads more expensive. Like £80 is the cheapest I can find it.  Anyway, one solution would be to buy two 5mm thick plates and weld round the circumference - that seems like it would work out quite a lot cheaper. The question is how would the thermal conductivity be affected by the tiny gaps which would inevitably remain in the centre (the two plates will never be completely flat)? Is there some kind of thermal paste that could mitigate this, which is very heat resistant? If so how would it deal with being superheated by the welding, and would it contaminate the weld? And lastly - this got me to thinking about copper bottomed pans - how do they bond the copper to the stainless steel (google is failing me- or I am failing google with poor search terms)?? So 3 sort of related questions: 1.Welded plate- big conductivity problem or naught to worry bout? 2.Super high temp. thermal past  - would it help? 3.How are pans copper bottomed anyway?? Thanks, Bongo

Question by bongodrummer   |  last reply


bare bronze welding cast iron

If you happen to have a some what rare car, or one that is simply thirty or more years old, you may find that if you ever crack your manifold exauhst that you can not get another by simply going to a (pick and pull) So, the first thought is..most of the time, "I will simply zap it with NIRod". WRONG! an old manifold that has repeatedly heated and cooled is very brittle and the sudden change in temp and too rapid cooling may crack it even more. Now what i do is use bare bronze rod and braze the crack. Here is how i do it. First I find the ends of the cracks and drill a 1/4 hole half way through the material at each end of the cracks. Next I use a rose bud torch and heat up the cast iron as evenly as possible peening with a hammer lightly to releive stress in the casting. After about five minutes of this I quickly switch to a oxy-actl. brazing tip and start my pass. The first thing i do is heat up as much of the crack as i can to cherry red and sear one coat of bronze using plenty of flux. Then I start at one end of the crack and fill in the crack that i had previously veed out with a grinder to half way of the depth of the material and no more than 1/4 inch wide. I use an overlapping spot weld like technique. i lay a small amount of bronze, remove heat for a second and overlapp where i left out. When done I have a bronze brazing weld with no undercut or cold roll. Then i use the rose bud again for some post heating gradulay reducing the heat and peening with hammer again. Then I quickly take the whole peice and cover it in powdered lime so that it cools very slowly. This will stop it from cracking due to rapid cooling. Also it may put some ductility in the cast iron. It takes about four hours to be cool enough to touch with the bare hand. Then I grind the bronze weld flush and inspect the weld to see if i got proper bonding, all you should see is a ribbon of nbronze that has no porosity or cavities. I have also done rare boat manifolds like this when repeative NIRod was used at other shops and they broke every time. Still no 100 percent with cast iron like this. Sometimes it just cracks more, after all it is a dirty porous metal that is very brittel. Anyway, i have had very good luck doing it this way

Topic by beserker   |  last reply


MOT spot welder?

I want to build an MOT spot welder and ive already cut the wiring out of the transformer but i noticed while doing so i scraped off what seems to be the coloring off the primary.  Will this affect it in any way? Also, i can really tell the power of this transformer? can anyone help?

Question by dask13   |  last reply



Help my oaw weld puddle is building and creating porosity ?

I’m a trainee oxy welder and I’m welding on inconel 400 and my weld has way too much porosity. I’m pre heating it to the correct temperature, and welding it how I was taught to by my supervisor and I have no clue to what is causing it to be so pores. I keep trying to ask them what is causing my problem but they clam to not know? Any possible solutions or theory’s 

Question by Griffgriffoaw   |  last reply


Can anyone make an instructable on building a gas welding gas kit?

Oxy acetylene kit with torch and gauges? Is it even possible?

Topic by eric m   |  last reply


i have a mig welder and my welds form in balls, i have to grind them down for ages, how can i make them pool?

Please could any EXPERIENCED WELDER advise me?

Question by l96470fps   |  last reply


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.

Topic by robbtoberfest   |  last reply


High Current measurement

I need to measure Current from a welding machine to make a alarm if it goes down below some level for ensuring better quality of welding. The current normally set is of the order of 200A max with around 100V DC.Not sure if i could use some clamp-on meters and pass those values out to Arduino for switching circuit. Shunt resistors may be a better option. But to make a signal conditioner to convert the ma output will be a problem i guess..is there something i can do with Arduino.. any ideas guys....? Thanks in advance Chuppandi

Topic by chuppandi 


What is the specific pressure of a liquid called?

I am more specifically referring to shielding gas for welding, C25 (which is 75% argon, 25% carbon dioxide). How do I find out what pressure the gas will be at a given temperature? This is, of course, assuming that the gas is liquefied and contained. If I left something out (because I don't know a lot about this particular conundrum) tell me, I'll comment back.

Question by thecheese429   |  last reply


welds form in balls, not strong.gassless mig 60-90A , 10/15% duty cycle, wire speed 0-10.3 m/min? Answered

Settings above, not sure of wire but am using what shop said to get

Question by l96470fps   |  last reply


What is the best way to connect 2 pieces of steel together, to make i strong on a Lloyds machine (bolt, weld & etc)?? Answered

I am required to make a 'joint' between to same steel samples.. but the rules are:- The joint will be tested for strength & weighed. Mark awarded in proportional to Load (N) - 100 x mass (g)- All materials and methods are permitted for joint (welding, bolting etc).- Material around hole must NOT be reinforced, but it may ve cut back- All completed joints must fit into the Lloyd machine, using standard attachment (with 8mm diameter pin through the 10mm hole). The holes MUST be 300 +/- 20 mm apart (centre to centre). These holes must be oringal holes - drilling new holes for pin is not permitted.Any help would be So appreciated! Many thanks

Question by SeanD1210mk2   |  last reply


High Current measurement using Arduino?

I need to measure Current from a welding machine to make a alarm if it goes down below some level for ensuring better quality.The current normally set is of the order of 200A max with around 100V DC.Not sure if i could use some clamp-on meters and decode the values. Shunt resistors may be a better option. But to make a signal conditioner to convert the ma output will be a problem i guess..is there something i can do with Arduino.. any ideas guys....?

Question by chuppandi   |  last reply



robotic arm arc welder

Is it a robotic arm capable of arc welding feasible for a diyselfer ? I spotted some robot arms for cheaper than 200 $ over the web . Vantages for the operator would be no weld fumes breathing , no uv rays and such ..

Topic by gabdab   |  last reply


what determines the max current that can be drawn from a transformer's secondary coil?

How could i figure out what the max current i can get out of a transformers secondary coil? example: a welding transformer

Question by twenglish1   |  last reply


120V MOT transformer on 220V for spot welding machine? Answered

Hello i'm making a Spot welding Machine using a microwave transformer i'm removing the secondery coil to replace with 2 rounds of very thick wire for the output . the only problem is the transformer rated for 120V input Will it matter if i connect the primary to 220v ? i'm replacing the secondery anyway ?

Question by pixema   |  last reply


Help with some engineering issues on a folding tail gate ramp?

I'm building a folding ramp to replace my tailgate on my truck. It's going to be used to load/unload a ztr lawn mower. (It's been built primarily from discarded bed frames, with the addition of some expanded steel grating.) Because these mowers are back heavy, and low to the ground, a longer ramp is needed than you need to load a conventional mower. My solution is a spring loaded 8' ramp that is comprised of two 4' sections that fold down and out. It functions, it fits, the mower goes up and down it ok. The problem is that it is so heavy, that after it comes down about 2/3 of the travel, it is very difficult to control. When it comes down hard, it puts tremendous stress on the center - where the two sections of ramp meet. It can be hard enough to break it. I know my welding isn't the best, but that's really not the issue here. This is a design problem. I'm going to post a few pictures, to better illustrate my situation, and to show some of the things I've tried to soften the blow. The picture of the partially folded ramp was taken at the point where it begins to get difficult to lower without losing control. So, to clarify, I need a way to lower and raise the ramp with more control, and or soften the blow towards the middle.  The springs I'm using are 140lb garage door extension springs, the largest springs available at any big box home center. I need to get this finished yesterday, so I'm going to try some things while I'm waiting for a response, like move the springs back further in the bed to put more tension on the whole thing. I'll also post this to the welding web forum, but I started here because I've got a lot of faith in the ingenuity of the instructables community. If we get the bugs out of this thing and anyone wants it in instructable form, I'll do my best. Thanks for reading the War and Peace of ramp questions. -Amir

Question by Amir   |  last reply



how do plasma cutter power supplies work? Answered

I built a small stick welder, now i plan to build a plasma cutter i am going to buy the torch head because it seems it would be hard to make one(if anyone has an easy way to make a torch please tell me) but what i need to know is what goes into a plasma cutter power supply, right now i have 2 transformers (20 volts, about 30 amps) i know for plasma cutting i need DC current. how much voltage and current is needed. i don't plan on cutting any really thick metal this is just a little experiment i want to try. so can you please provide a schematic of a power supply and explain to me what the required outputs are

Question by twenglish1   |  last reply


If I attempt to weld a sprocket onto the shaft of a stepper motor will it damage the motor?

I suspect the answer is yes....anyone got any advise on how to fasten sprockets onto shafts?

Question by afridave   |  last reply


How do i join 2 pieces of metal without welding?

I am going to attach 2 metal tubes ( 1 aluminium and 1 steel) to eachother without welding, as i am only 15. how do i do this the best way? i need them to be very strong as they are forming a steering rod.

Question by ThaNorwegianDude   |  last reply


Anyone know of any awesome projects with circutry and electricity that a total beginer would be able to try out?

Im 15, and I have NO experience with electricity or circuts or anything, but really want to try it out. Im wonderin if anyone knows of any easy, cool projects to try that would introduce me to the stuff, without the risk of serious electrocution if I screw up : )

Question by ilikefunnymovies   |  last reply


How can I build a 220V welder using 220V microwave oven transformers? Answered

I read TimAnderson's Instructable on building a homemade welder from microwave oven transformers, but that instructable is for a 110V setup, what should I change to make it work using 220V transformers on 220V. (I already gathered all the materials...)https://www.instructables.com/id/Build-a-Microwave-Transformer-Homemade-Welder/ ....Link to TimAnderson's homemade welder?

Question by inserbot   |  last reply


Modding a cheap MIG welder?

I recently bought a cheap mig gasless mig welder and I was doing some online reading about it. So I found out a mig welder should be DC, with gasless having the clamp at + and the torch at - . However when I looked at the schematic (in the images) and inside the welder to confirm it, and it was AC. So it turned out really cheap welders are ac. So my I want to try mod it to be DC. My question was, what diodes should I use? What Capacitors and capacitance do I need? And how do I design a Choke? I was looking at getting this diode: http://www.ebay.com.au/itm/MBRP400100CT-400A-100V-SBD-Schottky-Barrier-Rectifier-Diode-Module-/160930207205?pt=AU_B_I_Electrical_Test_Equipment&hash;=item25783015e5&_uhb=1  And then putting two of them together to make a full wave bridge. Would a Schotty diode Work? Or do I need a stud diode? And about what capacitance do I need? Would lots of 2200uF 50v capacitors in parallel work? Could I put in a variable ballast? and where would it go, on the 240v side or the output? Lastly, could I also add a modded microwave oven transformer for low voltage high current in parallel to boost the power? I guess I would have to wind it to have a similar voltage. Thanks

Question by makincoolstuff   |  last reply


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?

Question by stevnmilr   |  last reply


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.

Topic by eric m 


How can I salvage LEDs that are welded to metal heat sink? Answered

I have a light fixture that used to be an street lamp, and the 350mA 240V constant current ballast failed. The LEDs appear to be welded directly to thin insulated metal sheets which as somehow bonded to the large metal heatsinks. I think the LEDs are Cree XR-C's, and there are 6 of them on each module, and there are I think 6 modules in total. I have some ideas, but how would I get the LEDs off the modules, if they are even worth saving at all? They are according to CREE they produce 78lm @ 2W, and are a pathetic 39 lm/watt. If I can get them off the aluminum heatsink easily enough, I might be able to use them for prototyping purposes so I do not kill $$$ XM-L LEDs, and do not kill 3mm white LEDs either, since I tend to kill those quite fast too by overdriving them or too much voltage. It is amazing to think how far technology has come, that XML led sitting next to the module outputs more than double the light, with less 20% less power!!! I have always thought that LED technology still has a WAY to go before becoming practical enough to justify the higher costs, but if a company has installed this Piece of Sh*t light fixture back when these LEDs were 'state of the art' than I wonder when metal halides go obsolete!

Question by -max-   |  last reply