I read the instructions on some wleding rods and it confused me- I have now forgotten what it said, but I think it was saying for that particular rod it was...
... Yes DCEP is "electrode" or stick positive. DCEP gives a bit more penetration than DCEN. You will find most modern rods like DCEP. I use DCEP as my welder...
Hi Guys- Â What is "PIV"? Â I used a couple old unregulated Ford alternators - I figured an external regulator would be easier to mess with if I wanted to...
... Peak Inverse Voltage - the voltage where the diodes go poof. ... The Ford/Motorcraft alternator I used had a regulator bolted to the back. it also held the...
PIV is Peak inverse Voltage, it is the max amount of voltage a diode can stand before it fries. You can not use the AC from the alternator to weld with, it is...
Hi George-  Good point- I dont know for sure but my foggy memory seems like for power ratings you look at RMS values- but I dont know for components....if...
Hi-  I wasnt really worried about a safety margin for the engine- I was looking for fuel efficiency and a cheap pull start engine- and having a little...
Im with you- dont like to redline the engine so I want to gear the alternator up with pulleys and the alternator can take very high RPM's- a book I have on...
you got me... I was wondering if the power control on an old microwave might work- i have no idea how it operates but I have an old microwave I picked up and...
Hi Scott- I think I got it- the diodes act like an short circuit to forward voltage- and you have to just be sure to limit the forward current/power etc......
Hi Scott- I think I got it- the diodes act like an short circuit to forward voltage- and you have to just be sure to limit the forward current/power etc......
Hi Terrance-  How you been? Thanks for straightening me out-I reckon I better always finish my advice with a disclaimer, something like :  1. Try at your...
... Peak Inverse Voltage. One of the important specs to consider for a diode. A sine wave that gives you, say, 120v AC has voltage peaks considerably higher....
... Yes... But for cases where you need more accuracy you need to consider Power Factor but we don't need to worry about that here. ... Depends entirely on the...
... fuel .. and save a bigger engine for doing work OK, that makes sense I guess. But as long as you realize that you can't run the alts to their capacity with...
... Microwaves are full on or off. They cycle on/off with 10% power is on for 5 seconds, off for 45. -- ... today's fortune You got to be very careful if you...
... should be able to get 120 volts output..thats my intent- be able to drive em to full output for intermittent heavy welds. You won't maintain 120v when...
... 120V is real high. My 475 amp Airco is 80V, probably the highest voltage i have seen. I run my portable at 50V and it works fine. Then again, i have a PWM ...
... PWM gets a bit complicated especially if you make it a switching supply. I do have a simple linear circuit that uses some OP-Amps and a MOSFET to drive the...
George- I got a couple old ridng lawn mowers- maybe we need to install your motorcycle engines on my mowerframes and  start a mower rally racing team... ......
Scott-  When I get up and running I may try to build your circuit- just to be sure I understand it - you can set your circuit to keep the welder output...
Scott-  When I get up and running I may try to build your circuit- just to be sure I understand it - you can set your circuit to keep the welder output...
... No, you do not want a constant voltage for arc welding. Welding is normally about 18-28V. You want a higher voltage to start and it needs to increase the...
... Naw.. Wud never work out. The engines I was thinking about were 70cc, 90cc and 110cc. But I had forgotten about my stash of GY6 engines, 9 hp, 150cc. Still...
Hi Scott-  I want to figure this out, at least intuitively- is this correct- when you load the output and it draws current, then the field coil draws...
Hi- I tried battery welding for the 1st time - welding a 7 inch pulley to a 1 inch hub for the alternator welder. My set up- I used two 12V marine batteries in...
... As you add more load, the field will draw more current. The output current opposes the field so you need more field current to maintain the voltage. BTW,...
Hi Bradley, That's interesting work you did with the battery welding system. Mine was a primitive, yet very effective, system comprising 3 car batteries and 16...
Hi Steve-  I think 3 batteries probably work better but I was able to make do with 2 of them. That is a cool idea you had to make a 3 battery charger like...
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