what i am doing wrong, dual wrapped or quad coild doesnt work

[quickbot]

Hello all. Im fine with 0.5ohm dual builds, but i wanted to try wrapped or 4x coild. But it never does work as soon as i tighten post screws. Readings show 0.0ohm

Sowhat is the problem? Do i have drippers that doesnt work with quad and wrapped or just its damn hard to make one work? Im using 0.32mm kanthal and all is fine for dual. 4x coild show 0.0ohm readings even untightened, 2x wrapped shows 0.5ohm only while post screws are lose.


Just ordered 23awg kanthal and it looks like that with it i wont make quad coild for sure.

So im pretty new to builds and really cant get it whats wrong.

Have tobh atty and magma paradigm, both for 22650 mod.

 

[RandyF]

I don't believe the Tobh or the Magma are designed for quad coils, you need airflow to all four coils. This doesn't solve your problem, but even if you do get it to work, you shouldn't be doing it on these attys.

 

[quickbot]

that i understand. But i want to get it, why it doesnt work. even with 2x wrapped. But normal unwrapped works.

 

[GeorgeF]

The lower the gauge# the less resistance you will have. 23 gauge has lower resistance than say 32 gauge. The more coils you jam into an atty the less resistance you'll have. coils in parallel cut the resistance in half.Two 1 ohm coils will give you .5 ohms in parallel. Four 1 ohm coils would probably give you 0.00 ohms.

I believe it would need to be a series-parallel circuit to have four .5 ohm coils to give you .5 ohms all together. coils in series add resistance. coils in parallel divide resistance.

 

[Trypno]

I did a quad coil build the came out to .5ohms overall last night. The trouble is I had to make each coil at 2.0ohms to do that. It wouldn't be too big of a problem if I had thicker wire, but at 28ga I had to wrap each coil 15 times to achieve that. It takes forever to heat the build up unless I pulse fire.
I'm wondering about the idea of a series-parallel build. The center post on my rda has two holes, so it would be feasible, though a pain in the ...., to have four coils all made from a single strand of kanthal. If each coil were .25ohms, that would add up to 1.0ohms overall. The only question is would the parallel effect come into play and just quarter the resistance back down to an overall .25?

 

[Mike 586]

If all the coils are the same ohm rating, the math is pretty simple. Divide the ohms by the number of coils.

I'f the OP is running four .5 ohm coils, the final reading should be 0.125 ohms, four 1 ohm coils would read 0.25 ohms. Not many regulated devices can read below .25 let alone .125 and a build that low and would simply read zero or say something like short, resistance too low, etc.

 

[Neolithium]

Just out of curiosity, are you trying to end up with a 0.5ohm parallel coil? 32gauge wire isn't exactly resilient to work with, if you're running quite a few into those post holes they could be fracturing inside the posts when you tighten down and causing the short and weird readings. How exactly are you building your coils, as in what are you wrapping them around and how many wraps; and what device are you using the atomizer on?

 

[WharfRat1976]

Hello all. Im fine with 0.5ohm dual builds, but i wanted to try wrapped or 4x coild. But it never does work as soon as i tighten post screws. Readings show 0.0ohm

Sowhat is the problem? Do i have drippers that doesnt work with quad and wrapped or just its damn hard to make one work? Im using 0.32mm kanthal and all is fine for dual. 4x coild show 0.0ohm readings even untightened, 2x wrapped shows 0.5ohm only while post screws are lose.


Just ordered 23awg kanthal and it looks like that with it i wont make quad coild for sure.

So im pretty new to builds and really cant get it whats wrong.

Have tobh atty and magma paradigm, both for 22650 mod.

Make sure your mod is plugged in ie; your 510 connector is making contact with your atty pin

 

[CMD-Ky]

This comment from WR is quite true. I have a very odd 510 (Tatroe Atlas) and many pins simply will not make a connection. I could use a wrench on the atty and it will not fire. Put the same atty on a Provari and it pops. The Provari pin floats; the Atlas is fixed.

Make sure your mod is plugged in ie; your 510 connector is making contact with your atty pin

 

[quickbot]

connection is all fine, as i get easy 0.5ohm from 5wrap on a 3mm screwdriver in dual build. Just got 23gauge wire, made 8wrap on 3mm and even single one shows 0.0 reading. Can it be, that magma and tobh isnt designed for large wires? Only reading ive got was 2ohm with single 8 wrap untightened, but as soon as i tighten it up/as soon as screw touches wire i get 0.0 again. But it never happens with twisted 0.18mm in dual coil builds or 0.32mm dual coils(twisted gets 0.0ohm reading too)

I test resistance on vtr box mod, but looks like it doesnt show less than 0.5ohm...but still, all large wire doesnt get contact or i really doing something wrong with 23awg....

Was happy to get it yesterday, but looks like all i can do is make a basket from 20m of that wire


I tried single 5 wraps,8 wraps and even 12 wraps, all show 0.0ohm So do i have to modify posts for these wires.


Anyways, thank you for infor and help!

 

[MrStik]

You might have a short somewhere in there. Try cleaning out your atty's and drying them. Silly question, but you are using a positive and negative post for your coils? And make sure your coil is not touching the deck as well

 

[Dissonance]

Here lately I've been stuck on the series/parallel quads actually. Personally, I use 22g N80, 6 wraps around a ~2.5mm screwdriver (spaced, not touching, personal preference) then bend it in half and have it so the two halves are almost touching, with both leads pointing in the same direction. Do this for each side for "quad" coil. Use 2 pieces of wick, running up one coil and down the other, slightly tightened in so the wick can touch the part of the coil that's bent, and leave just enough of a tail for it to touch the deck of your atty. This exact build is ~.16Ω, and perfect for the airflow of the Mutation / Dark Horse I can get pictures if you'd like ^_^

If you're using 28g (mentioned in OP) and shooting for .5Ω, using this method (The Tobh might be able to handle it, the Magma won't), you'd also have to do a 6 wrap dual coil then bend them in half. Maybe since you're using a tobh, doing contact coils might be a better idea than spaced just so you can keep the coils lined up with the airflow... It really helps if you have the AFC tabs removed so you can do a center post build with this.

 

[quickbot]

Thank you guys. Ive found the problem, i need a ohm meter My vtr only shows as low as 0.5ohm lol

 

[Meresya]

The lower the wire gauge, the lower the wire's resistance = more coils for intended ohm reading.

Doing a dual coil with 23g wire wrapping for a 3mm coil would require 14 wraps for 0.5 ohms. For what you seem to be looking for, it would require 7 wraps. However, one of the two following must apply for an overall 0.5 ohm resistance:

Two coils in serial, connected in parallel to a second pair of serially connected coils. Or the other way around: Two coils in parallel, connected in serial to a second pair of parallelly connected coils. Total resistance is the same as for a single coil. (1 R)