Temperature control coil building help required

[charliehorse]

Oct 27, 2015 17:21:32 GMT TallPaul70 said:

Right, I'm properly confused now...

After my first attempts the other day, I've been vaping happily enough using my Sigelei 75 TC and X Cube II, good flavour, plenty of vapour, but, if I'm honest, the vape seemed pretty chilly no matter what temperature I set them at, the Sig slightly less so than the X Cube II.

So today I've rebuilt my Bellus, using .28mm Nickel again, wrapped around a machine screw this time producing a spaced coil that was much tidier than the last attempts, really happy with how this looked.

I decided to try a cotton test to check everything was working OK, and this is where the confusion comes in.

On the Sig the cotton scorches at every temperture setting, right down to 200F.

On the X Cube II it doesn't scorch, right the way up to 600F.

What's that all about!? Same build on 2 devices, neither producing the effect I'm expecting (I though cotton should scorch at 410F?)

Any ideas??

Just a thought but the specs on the sig 75 say it only goes down to 212F - Sure you're in Fahrenheit and not accidentally in Centigrade ?  

[VapingBad]

Maybe members with those mods can help.

[TallPaul70]

Sorry, 212F is correct charliehorse, that's my rubbish short-term memory apparently, I tried the Sig 1st then the X Cube, then spent 10 minutes being confused

It was definitely in Fahrenheit, I whacked it down low, it was probably 220F as if I'd tried to go down to 200 it would have flicked over to Centigrade and I would have noticed.

[TallPaul70]

Stop the clock, think I've identified the problem... I've just put my TFV4 on the Sig and gone for a vape, that has the nickel coil in from my first experiments the other day and when I'm firing that the voltage is modulating.

So, it must be the build, even though it looks fine to me, there must be something wrong... I used the post holes, so maybe I've screwed it in too tight or something?

I'm going to start again and see what happens.

[charliehorse]

Oct 27, 2015 17:44:55 GMT TallPaul70 said:

Sorry, 212F is correct charliehorse, that's my rubbish short-term memory apparently, I tried the Sig 1st then the X Cube, then spent 10 minutes being confused

It was definitely in Fahrenheit, I whacked it down low, it was probably 220F as if I'd tried to go down to 200 it would have flicked over to Centigrade and I would have noticed.

No worries, just thought it was worth asking the question as I know how easy it is to overlook the obvious sometimes. I do it all the time  

Anyway, judging from your last post it looks like you might have it sussed.

[TallPaul70]

Absolutely charliehorse, I appreciate the suggestion, I'm totally in the dark here and wondering if I'm just trying to run before I can walk

Well, I've wrapped another coil and fitted it, again using the post holes but trying to be careful not to overtighten the screws... exact same thing, TC just not kicking in.

I'm clearly doing something wrong 'cause the mod seems to be doing what I'd expect (modulating the voltage) with the TFV4, so reckon I'm off to see if I can find any tips for nickel builds on the Bellus on youtube.

[robby]

What is the resistance of the coil ? TallPaul70. I dont think it can be anything to do with the post holes if you are getting totally opposite results on two different mods. Can you take any pics of the atty and coil fitted?

[TallPaul70]

Hi robby, 0.12 ohms, 8 wraps of 0.28mm nickel, 2.5 ID.

Tried taking a photo but can't suppress the flash on my stoopid phone, I'll try and stick one on after work tomorrow.

[decoy]

i had the same prob with a faulty sig,tc just did not work to the point i thought i had faulty wire lol
if your nearish colne could meet up and we can find out if the sig is faulty

[TallPaul70]

Oct 27, 2015 18:58:58 GMT robby said:

What is the resistance of the coil ? TallPaul70. I dont think it can be anything to do with the post holes if you are getting totally opposite results on two different mods. Can you take any pics of the atty and coil fitted?

Right, pictures...



I don't know if they're very illuminating. The coils are definitely not in contact with the atty anywhere but the post holes, there's no short. Other than that, I'm totally out of my depth, no idea

Cheers for the offer decoy, that's really good of you, I'm an hour or so away from Colne, but if I really can't get to the bottom of this I might take you up on it.

What's properly confusing though is that the mod is definitely working with the other atties I built a few days ago, and they were far ropier builds

What I'm going to do now that one of those is empty is do a cotton scorch test with that, see what happens with that... the TC was DEFINITELY working with that last night so if it doesn't behave today then... well, I've no idea, but I'll be very confused

[robby]

I dont know what atty that is, but is there only one air hole? The coil should be just above it if there is just the one hole. The coil does look very close to the chassis. Coil looks tidy but is possibly a little overspaced with the wraps.

[TallPaul70]

Oct 28, 2015 17:21:30 GMT robby said:

I dont know what atty that is, but is there only one air hole? The coil should be just above it if there is just the one hole. The coil does look very close to the chassis.

It's a Bellus robby, there are no air holes in the build deck, the airflow is direct in through the side of the tank once this part plugs into the bottom (I may not have explained that very well!). I've found a picture which may help:



The hole on the other side is where the single coil adapter plugs in to close off the juice and air flow on the other side, like a Goblin Mini if you've got one of them?

Just to further confuse matters, I've just tried a scorch test using the TFV4 that I was vaping with last night... with juice in the tank last night the temperature control was definitely working, with the same coil today, just with cotton in, it's not kicking in again, the voltage isn't modulating and the cotton is scorching at temperature settings far below what it should.

I've been using this Sig all day with a Lemo 2 coiled with nickel, and the TC has definitely been working.

So, works with juice in, doesn't without. That's the only conclusion I'm able to draw at the moment.

Bloody physics!

[charliehorse]

Edited - stupid idea

See next post

[charliehorse]

TallPaul70

Forget that last post.
Here (Should Be) a video of someone doing the scorch test at the full 75 watts.



Its at 1 minute 30 seconds in.

[TallPaul70]

Hi charliehorse, the watts have been set around 25-30, and even at that, without any juice in then it's just not activating the temp control. Another good suggestion though, mate, cheers

I've just whacked a new build on the TFV4, didn't try a scorch test just wicked it, juiced it and put it on with a minimal amount of juice in the tank in case it didn't work... vaping absolutely fine, voltage is modulating so the temp control seems to be kicking in and I have no idea what's going on

The only conclusion I can draw is that it will only work with juice in. I've seen youtube vids of scorch tests being done with this mod so it doesn't seem to be an inherent problem, but on the other hand if it's working in 'normal' circumstances I don't think I could send it back for a replacement? Or, in fact, whether that's necessary, it's working but I'm a bit worried that it's not working how it should.

I tell you, I'm looking forward to my eVic VTC Mini turning up (hopefully any day), I just hope that behaves in a predictable manner