Ok I've built one that works semi ok. It's 1.6ohms but if I go beyond 3 volts or fire it for more than a couple seconds I get a couple hotspots when the coil is covered in juice.
Eliminate hotspots?
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Your pics are a bit fuzzy, so I can't tell for sure, but it looks like your coils are too loose. also, seems like your using some pretty thick wire. Alot of times those pos. post nuts act like they are snug with thick wire, but they're not. (two pairs of pliers and twist nuts against each other, without pulling your coil too hard.)
edit. Also, if your resistance readings are jumping around, that indicates a loose connection (probably pos. post).
edit. Also, if your resistance readings are jumping around, that indicates a loose connection (probably pos. post).
how tight is it supposed to be? I've heard its not supposed to be too tight. I used the drill bit method and the coil lit up perfectly after I took it out but not when I put the wick in(although putting the wick in probably moved the coil around a bit).
your coil is very loose. it needs to be wrapped around the wick to properly transfer heat. proper transfer of heat is important and you will learn latter on that the response due to the thickness of the wick is important too. this is my coil. look how the coil wraps around the wick.
Drill bit method works the best for me with unoxidized mesh. Only thing I do is to make sure the wick is thick enough so that there's no gaps between coil and wick. My hand wrapped coils always turns out to be too tight and that didn't work well with unoxidized mesh.
Sent from my PG86100 using Tapatalk 2
Sent from my PG86100 using Tapatalk 2
I've tightened it up a bit but I can't get the hotspot on the top leg to go away. I've tried making it tighter, looser, and making as little distance from the coil to the positive as possible.
again don't use the drill bit method. the creator of that method is very clearly about the fact that you have to be very precise for the method to work. i see in your photos a very loose coil which you then try to make tight thus creating non even contact spots and so on. is very easy to make a coil glow even with nothing inside, as you have experienced the problem begins when you put the wick on. your problem is the same as many others using this method. you create 2 separate things and then try to make them work together.
is easier if you wrap the coil around the actual wick. that way you fit that coil to that wick. is like a custom made pair of clothes. i know you think is hard but is actually very very easy to make a good coil. just some practice and some understanding of the process.
the top hot spot problem can be resolved by adding washers or by twisting the wire like in my photo. but the top hot spot generally indicates a short somewhere
is easier if you wrap the coil around the actual wick. that way you fit that coil to that wick. is like a custom made pair of clothes. i know you think is hard but is actually very very easy to make a good coil. just some practice and some understanding of the process.
the top hot spot problem can be resolved by adding washers or by twisting the wire like in my photo. but the top hot spot generally indicates a short somewhere
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I have it mostly functional now. It's at about 1.8 ohms and can vape fine at 3 volts if I only fire for 3 or 4 seconds. After that I get a couple hotspots, mostly the top leg. It doesn't seem like a short.
Your coils are too loose.
Take your wick out of your aga. Torch your wick again for a solid 3 minutes (moving your torch up and down your wick.)
Wrap your coil on your wick while its out of the aga. Wrapp it in such a way that the bottom goes over the wick to ground screw and the top wire goes between wick and center post.
Put wick in aga. Then tighten the top wire first (Dont pull the wick toward the center post) Now pull bottom wire tight and tighten it down to the ground screw. You want the bottom coils tight to coil with out indenting the coil... where the top coil just a hair looser than the bottom coils. Space out your coils even apart from each other
Set your volts at about 5 volts. Just touch the fire button. What happens? Top coil lights up by itself? If yes turn coil counter clockwise. Touch fire button again and check. Take your time turn coil ever so slightly if that does not work start moving coils just a hair at a time and keep checking. Just keep moving thing a hair at a time and keep checking.
A couple minutes and you will see all the coils light up together.....
Fill tank and drop 3 drops onto wick put cover on and vape at a lower than normal volts for about an hour and slowly turn up volts to where you want the volts
Take your wick out of your aga. Torch your wick again for a solid 3 minutes (moving your torch up and down your wick.)
Wrap your coil on your wick while its out of the aga. Wrapp it in such a way that the bottom goes over the wick to ground screw and the top wire goes between wick and center post.
Put wick in aga. Then tighten the top wire first (Dont pull the wick toward the center post) Now pull bottom wire tight and tighten it down to the ground screw. You want the bottom coils tight to coil with out indenting the coil... where the top coil just a hair looser than the bottom coils. Space out your coils even apart from each other
Set your volts at about 5 volts. Just touch the fire button. What happens? Top coil lights up by itself? If yes turn coil counter clockwise. Touch fire button again and check. Take your time turn coil ever so slightly if that does not work start moving coils just a hair at a time and keep checking. Just keep moving thing a hair at a time and keep checking.
A couple minutes and you will see all the coils light up together.....
Fill tank and drop 3 drops onto wick put cover on and vape at a lower than normal volts for about an hour and slowly turn up volts to where you want the volts
Its not as loose as it looks. I made sure all the coils are right up against the wick. Unless its supposed to be strangling the wick. And mgmrik, I'll try that tomorrow. I'm putting this on hold for now.
Sometimes that is best.... just set it down and come back to it. Pretty soon we will see you on here paying it back helping someone else out that is frustrated like you WERE.......
By the way are there any rebuildables that are easier to work with? Even non tanks?
From the looks of your coils, you have a 2/3 wrap. 1.6 ohms so I'm guessing you your using 32g or 34g. I prefer a 3/4 wrap, I usually get less hotspots. I did a 2/3 wrap when I first started building my gen atty's and experienced the same things you were getting. If your getting a hot leg from the top coil, you might want to tighten it by making it closer to the center pin. Just loosen the the top nut and pull it a little. Or you can do what albcig did and make the top wire long enough to wrap the extra wire around the wire leading to the center pin. One trick that I do is, before I tighten the top wire going to the center pin, I move my wick a little with my finger and hold it so that the wire is completely in the middle and the wick is close enough while not touch the center pin. Just screw the nut enough where the wire won't move.
Don't get discouraged, everyone has gone through this. But you'll eventually you'll get it right and the feeling you'll get from building a perfect coil will be awesome.
Don't get discouraged, everyone has gone through this. But you'll eventually you'll get it right and the feeling you'll get from building a perfect coil will be awesome.
Hey guys I just want to thank you for all your help. I have it another shot and this one seems to be better than the last. I'm wasting a lot of coil but I'm improving a bit each time. The one I have now is at 1.7 ohms with no hotspots after firing it for about 5 seconds. I've only been able to go to about 3.3 though. Would a smaller gauge like 28 be easier to work with? Also is there any difference between Kanthal and Nicrome?
the only real difference between Kanthal and Nichrome is that Nichrome is lower resistance. i.e. 30 gauge Nichrome is like 29 gauge Kanthal. So, practically speaking, you would have to add a wrap to your coil to get the same resistance.
28 is not a smaller gauge, its actually a thicker wire. and yes for me it is easier to work with but it has less resistance then a thinner wire so it is best suited for a mechanical mod. 30g wire would be your best bet.
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