| Author | Message | ||
     David S |
do you think this welder will work? [img]C:\Documents and Settings\Family\My Documents\My Pictures[/img] | ||
| David S |
hmm no photo how do i put one | ||
| Andrew |
To learn how to insert a picture, go to this page: Inserting Images | ||
| David S |
C:\Documents and Settings\Family\My Documents  My Pictures | ||
| David S |
ok there it is now will it work??? | ||
| Simon Quellen Field (Sfield) |
You don't mention the turns ratio on the transformers. When the electrode touches ground, you basically have a short circuit. This will turn the fan off, which is probably not what you wanted. It may also blow a circuit breaker. If the fan was in series instead of parallel, it would act as a safe load, so that when the electrode touches ground, it simply acts like a switch, turning the fan on. You would want the fan to be high wattage in that case, so you still have watts to heat the materials you wish to weld. You could keep the fan as it is, and place a 1,000 watt heater element in series with the main power switch to act as a current limiting resistor. None of this really qualifies as a "science toy" however, and it is much more dangerous than what I normally write about in this web site or in my books. It is not a project I can recommend. Commercial arc welders are not much more expensive than the parts your are using, and they might have some additional safety features that make them a much better bargain. You can get one for $135, which seems to me like not a lot to pay for safety. Plus you won't have to ask people on the Internet whether or not it will work. | ||
| Anonymous |
Theodore Gray wrote an article about homemade arc welders in Popular Science. Try going to http://www.popsci.com/popsci/science/article/0,12543,611070,00.html | ||
| David S |
ok i am planning on replaceing the secondary coil with 6 guage single conductor wire. I plan to get about 12 to 15 turns on each transformer. | ||
| David S |
you mean wire the fan like this?  | ||
| Simon Quellen Field (Sfield) |
I think you meant to cut the wire between the fan leads. That would put it in series. Otherwise, the fan does nothing, since there is a short circuit between the leads. | ||
| David S |
"you basicly have a short circuit when you ground the electrode" thats true but it won't trip a circuit breaker this will create a controled short or spark if there was no transformers there then it would trip a breaker what amp breaker would i need for this mini arc welder?(im thinking a 20 amp breaker should do good) oh and ill rewire the fan the original way | ||
| Masina (Unregistered Guest) Unregistered guest Posted From: 195.10.125.185 |
How thick steel are you planning on welding with this? Wouldn't it be a good idea to install a thermal cut out? |
