Ohms changing overnight???

[GMayberry]

I have an Igo-L clone on an eVic so I need to stay above 1Ω, and I wrapped a coil last night, 6 or 7 wraps of 28g kanthal on a drill bit (can't remember what size, I'm at work now and it is at home) and it read at 1.1Ω. I dripped a bit last night, wick stayed saturated but not much in the shallow well. Woke up today, dripped on the way to work, and the coil read 1.9Ω, and now it reads 2.0Ω.

What is causing this??

 

[Tinkiegrrl]

Could be that one of the post screws loosened up. Try tightening them down a bit.

 

[GMayberry]

I was just talking to a guy at work and when he builds, he wraps his around the post screw a complete turn or two. I am just wrapping an L shape around it and tightening. Should I fully wrap the screw?

 

[Tinkiegrrl]

I was just talking to a guy at work and when he builds, he wraps his around the post screw a complete turn or two. I am just wrapping an L shape around it and tightening. Should I fully wrap the screw?

I wrap them all around as well, but I don't think doing an L is wrong. It may be more apt to come loose though.

 

[GMayberry]

They are still just as tight as they were at build. This is baffling me. I have seen then change .1 or .2 after a week or so and that is when I replace them, but this is .9 difference in a matter of less than 12 hours. I am new to rda's so any and all help is greatly appreciated!!

 

[Tinkiegrrl]

They are still just as tight as they were at build. This is baffling me. I have seen then change .1 or .2 after a week or so and that is when I replace them, but this is .9 difference in a matter of less than 12 hours. I am new to rda's so any and all help is greatly appreciated!!

Hmm... Hopefully someone with more experience then myself will pop in. I only started building last month myself, so I don't have many experiences under my belt. The only time I've ever had a similar experience was from before I started wrapping the legs of the coil all the way around. It would appear that the legs were being held in place, but in reality, they weren't making good contact with the screw under the head of it. Apparently, when I tightened the screws down, the screw heads would sort squeeze the coil's leg out just a tiny bit, so that they were barely making contact. They made enough contact to give me a resistance, but it would kinda jump all over the place.

 

[GMayberry]

Ok wow..... I just looked at it again, it has been sitting on my desk untouched since I checked the screws earlier.... It is now reading 3.4Ω. WTH is happening??

 

[GMayberry]

Well I had enough wire from the post to the coil to loosen it up and actually wrap more around the post and that seems to have corrected it. It is now reading 1.2Ω. I guess the wire was slowly slipping out from under the screw, I need to start wrapping more.

Since we are on the topic, what tells me that I need to replace the coil? I will rewick it every day or two, and dryburn it back clean. Does it just eventually stop working, or what will I notice?

 

[vapdivrr]

Coil could last for months. I never had one just stop, ever so that really won't happen unless you short it out somehow. Basically just keep an eye on it, if it starts to look really ratty, make a new one.

Sent from my SCH-I545 using Tapatalk

 

[Dissonance]

Dry burn it then run it under some water (While the coil is glowing, after releasing the button obviously) and it'll be good as new. Chances are you'll get bored of the coil before it actually craps out

 

[GMayberry]

As long as it stays where it is now and keeps working like it does, I doubt I will get bored of it. I just ordered 100' of 28g kanthal last night. I guess that gets to sit around for a while! haha

 

[Knifemaker]

In all of the How-to vid's I have seen on building addy's, I see the same mistake over and over again. (Builds such as on Kayfuns.) Everyone holds the rod, or what ever is used for the wrap, and turns the wire around it with the right hand.

When put on the addy, the wire is on the wrong side of the screw for tightening. It wants to shoot out of the screw, deck junction.

If you reverse this, and hold the rod with the right hand, and wind with the left, the wire will be pulled into the screw connection when the screw is tightened rather than being ejected. It will make for a more secure connection and self tighten the wire.

Learned this trick from an electrician when a a boy helping with a local electrician while wiring houses.

KnifeMaker

 

[vapdivrr]

In all of the How-to vid's I have seen on building addy's, I see the same mistake over and over again. (Builds such as on Kayfuns.) Everyone holds the rod, or what ever is used for the wrap, and turns the wire around it with the right hand.

When put on the addy, the wire is on the wrong side of the screw for tightening. It wants to shoot out of the screw, deck junction.

If you reverse this, and hold the rod with the right hand, and wind with the left, the wire will be pulled into the screw connection when the screw is tightened rather than being ejected. It will make for a more secure connection and self tighten the wire.

Learned this trick from an electrician when a a boy helping with a local electrician while wiring houses.

KnifeMaker

doesn't matter what hand you wrap it with. What matters is if it's wrapped clockwise or counter clockwise. Both directions can be achieved with any hand.

Sent from my SCH-I545 using Tapatalk

 

[Shootist]

Dry burn it then run it under some water (While the coil is glowing, after releasing the button obviously) and it'll be good as new. Chances are you'll get bored of the coil before it actually craps out

I do basically the same except I wait until the coil has cooled slightly before run any water on it. Then I do another dry burn to get all the water off, out, of the coil.

The only time I change the coil is when I feel like it. I haven't yet "HAD" to change a coil because it no longer functioned.

 

[Shootist]

In all of the How-to vid's I have seen on building addy's, I see the same mistake over and over again. (Builds such as on Kayfuns.) Everyone holds the rod, or what ever is used for the wrap, and turns the wire around it with the right hand.

When put on the addy, the wire is on the wrong side of the screw for tightening. It wants to shoot out of the screw, deck junction.

If you reverse this, and hold the rod with the right hand, and wind with the left, the wire will be pulled into the screw connection when the screw is tightened rather than being ejected. It will make for a more secure connection and self tighten the wire.

Learned this trick from an electrician when a a boy helping with a local electrician while wiring houses.

KnifeMaker

If you do a over the top clockwise wrap the wire ends up on the correct side of the mounting screw so it is pulled in when tightening.

But then whenever you start to tighten the screws the wire always want to work its way out from under the screw. That is unless you wrap it all the way around the screw.

 

[Knifemaker]

Well Duh! LOL!!!

KnifeMaker

 

[edyle]

I was just talking to a guy at work and when he builds, he wraps his around the post screw a complete turn or two. I am just wrapping an L shape around it and tightening. Should I fully wrap the screw?

Absolutely; it's not like it's gold wire and you need to save every milimeter; I'd wrap it round 2 or 3 times for good measure.

 

[edyle]

They are still just as tight as they were at build. This is baffling me. I have seen then change .1 or .2 after a week or so and that is when I replace them, but this is .9 difference in a matter of less than 12 hours. I am new to rda's so any and all help is greatly appreciated!!

Remember to take into account the top cap.

Sometimes everything looks and seems great, then when you put the top cap on, the top cap touches part of the coil;


also, after you screw down, fire the coil to get it hot then apply the screwdriver again; you'll find the heat causes the screwdown to losen a bit.