Hot legs, what causes it and how to prevent them?

[paulw2014]

On my first attempt to build coil and drip, I got hot legs, legs that glows. The taste was burnt. Is the only way to solve this is to use non-resistance wire for legs?

But I see other ppl build with kanthal with no problems.

Or am I supposed to make the "legs" short or nonexistent by placing the exit from the coil near the screw (terminal)?

thx

BTW, what are micro coils? I've been researching hot legs and it seems micro coils doesn't produce hot legs.

 

[Annie56]

Check out Super X Drifter's microcoil thread. Will tell you everything you always wanted to know about microcoils!!


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[GodOfThunder]

On my first attempt to build coil and drip, I got hot legs, legs that glows. The taste was burnt. Is the only way to solve this is to use non-resistance wire for legs?

No, using regular kanthal or nichrome is fine. If you're building traditional coils (spaces between the wraps), then the hot legs may be produced because you may have a short (wires touching) somewhere. Either each other, the post, or the deck.

BTW, what are micro coils? I've been researching hot legs and it seems micro coils doesn't produce hot legs.

Micro coils, from my understanding, are contrary to traditional coils, in that each wrap is touching each other...most builders I've met use either a screwdriver, drill bit, nail, whatever...to keep the coil uniform (I use a 5/64 drill bit). Once wrapped, the coils are heated (either with a flame or directly on the atty) and squeezed together to help the wraps keep their shape.

Hope this helps...you can take Annie's advice and check out Super X Drifter's thread, or just search YouTube for micro coils...there's a bunch on there.

 

[Dampmaskin]

One of the reasons why microcoils don't get hot legs, is because the legs percentage-wise makes for a very small part of the coil wire, and because the close or touching loops concentrates the "heat buildup" in the coil area instead of evenly distributing it over the resistance wire. With my calculator (link below) you can test different configurations and see how much power is lost in the legs. Personally I consider 5-8% leg power loss "normal", and anything above 12-15% too high.

 

[Talyon]

It's my belief that this phenomenon Hot Legs is caused by the Sun.

To avoid Hot Legs, stay indoors or if u must go out wear pants or leggings.

Some have been known to dip Hot Legs in a swimming pool, or nearby lake to alter the effects.

Have a great Vape Day!

Hehe.....

 

[deedupdex]

On my first attempt to build coil and drip, I got hot legs, legs that glows. The taste was burnt. Is the only way to solve this is to use non-resistance wire for legs?

But I see other ppl build with kanthal with no problems.

Or am I supposed to make the "legs" short or nonexistent by placing the exit from the coil near the screw (terminal)?

thx

BTW, what are micro coils? I've been researching hot legs and it seems micro coils doesn't produce hot legs.

First of all do you know how or have you tried getting rid of hotspots? Squeeze, or strum the coils multiple times. What resistance are you building at also?

 

[Jonathan Rizo]

First of all do you know how or have you tried getting rid of hotspots? Squeeze, or strum the coils multiple times. What resistance are you building at also?

although I always strum the coils after pulsing I've never known what this does exactly, I just know that it helps get rid of the hot legs because immediately after it starts firing like a god. Anyone know what this truly does? Maybe it'll help the op.

 

[TrolleyVW]

although I always strum the coils after pulsing I've never known what this does exactly, I just know that it helps get rid of the hot legs because immediately after it starts firing like a god. Anyone know what this truly does? Maybe it'll help the op.

I'm pretty sure it aids the oxidation process. Oxidation forms microscopically between the individual coils and creates a "layer", concentrating the heat into the wire so it's continuous throughout, rather than sporadically trying to jump across the coils.

That's at least what I was under the impression of.