Titanium wire, vaping and safety

[TheBloke]

So my questions are; Is higher or lower resistance than 0.21 ohms working better for people on a sx mini m class? And also is a lager diameter wire preferred over a smaller one using tight coils? I'm already thinking about the next build trying a twisted or parallel core in the clapton but would like some opinions on this from some people with some time behind the wheel of a few titanium builds as I find working with the brittle/springy nature of titanium to be slightly frustrating.

Very nice build! In terms of resistance, the formula in general: the higher the better. That should apply in practice on most mods, though there may be some that have issues at much higher resistances, and I don't know if this applies to the SX Mini M. But if you're currently at 0.21Ω it's very unlikely you'd hit such limits even if they are there (they'd likely come in around 1.0Ω)

Higher resistance means greater absolute accuracy, and generally lower battery usage.

Not that you need to inflate your resistance to improve these things with Titanium, it's going to be pretty accurate with all likely builds. So build what you want and whatever resistance you get is usually fine - that's a key advantage of Titanium over Ni200. Just don't artificially reduce it.

 

[2legsshrt]

Just wondering does anyone know how the SXML will be able to use anywire knowing your vaping curve for that wire. What numbers will you have to plug in and how does TCR work. I have looked at Wire Wizard on Steam Engine and it shows the TCR for 26awg Ti1 as 3659.89X10to the minus 6th power. Huh?

 

[Mad Scientist]

Just wondering does anyone know how the SXML will be able to use anywire knowing your vaping curve for that wire. What numbers will you have to plug in and how does TCR work. I have looked at Wire Wizard on Steam Engine and it shows the TCR for 26awg Ti1 as 3659.89X10to the minus 6th power. Huh?

That sounds about right. Translation 0.00365989

 

[RainbowFartingUnicorn]

@TheBloke That makes a lot of sense as you will have a greater resistance span with a larger starting resistance. Am I right I'm assuming then that the smaller the overall diameter of coil wire will help reduce ramp up time? I am getting good flavor off of this build and love the burnt hit protection but just don't get the same hit that I was getting with a previous kanthal clapton build that was ohming out at .44 and was being fired at 60 watts.

Sent from my SGH-I337M using Tapatalk

 

[2legsshrt]

Also has anyone figured out what the total leg length is on a Kanger STM with a 5 wrap spaced coil. Approx. in mm

 

[TheotherSteveS]

@TheBloke That makes a lot of sense as you will have a greater resistance span with a larger starting resistance. Am I right I'm assuming then that the smaller the overall diameter of coil wire will help reduce ramp up time? I am getting good flavor off of this build and love the burnt hit protection but just don't get the same hit that I was getting with a previous kanthal clapton build that was ohming out at .44 and was being fired at 60 watts.

Sent from my SGH-I337M using Tapatalk

smaller wire diameter (higher guage) coils give less coil mass per ohm so quicker ramp!!

 

[TheotherSteveS]

Also has anyone figured out what the total leg length is on a Kanger STM with a 5 wrap spaced coil. Approx. in mm

a lot! Around 15mm, maybe more!

 

[BigEgo]

Also has anyone figured out what the total leg length is on a Kanger STM with a 5 wrap spaced coil. Approx. in mm

I've found the default setting (5mm) on steam engine to be pretty close to what my coils actually ohm out at.

 

[TheotherSteveS]

I've found the default setting (5mm) on steam engine to be pretty close to what my coils actually ohm out at.

ok but that is surprising....Maybe I'll rip an old one apart and measure it later!

 

[Croak]

Also has anyone figured out what the total leg length is on a Kanger STM with a 5 wrap spaced coil. Approx. in mm

You talking about the prebuilts or just using the RBA deck? The default 5mm is usually "close enough" for most RTA/RDA build decks, we're talking a variable of no more than a few hundredths of an ohm.

Prebuilts, well, those have ludicrously long legs, especially the vertical coils, which are both long-legged and uneven, and with the top leg actually running past the heated center of the coil/wick further screwing up your average resistance reading.

 

[BigEgo]

ok but that is surprising....Maybe I'll rip an old one apart and measure it later!

I was talking about the RBA deck, btw. I've never used pre-built coils.

 

[TheotherSteveS]

I was talking about the RBA deck, btw. I've never used pre-built coils.

Ok fine. Thought you meant premades...

 

[2legsshrt]

Well I was just thinking of getting some 28awg Unkamen and wrapping a 5-6 wrap coil to see if what I think about the Ti mode on the SXM is true. If you have a .45 coil the mode actually works. Just daydreaming about experimenting.

 

[RainbowFartingUnicorn]

OK so maybe I'll use a pair or trio of 30awg for the core vs the 26awg then as I wouldn't want any slower ramp up than I have but would like to experiment with more voids in the wire for better wicking/flavor. Has anyone found a source for grade 1 Ti in a 36awg or smaller?

Sent from my SGH-I337M using Tapatalk

 

[BigEgo]

Well I was just thinking of getting some 28awg Unkamen and wrapping a 5-6 wrap coil to see if what I think about the Ti mode on the SXM is true. If you have a .45 coil the mode actually works. Just daydreaming about experimenting.

If you're building for the STM, get 26 gauge.

 

[TheotherSteveS]

If you're building for the STM, get 26 gauge.

24 is fine also but yeah, 26 probably better to get the R up a bit. I use twisted 30g now though!

 

[TheBloke]

That sounds about right. Translation 0.00365989

I'm not sure where Steam Engine gets that number from.

The spreadsheet that @vapealone maintains, which uses a comprehensive study of near-pure Titanium as its source, indicates 0.0035 in the vaping range. That is also the figure I verified with my own temperature probing with Titanium. I tried 0.0036 right up to 0.004 and at least on the Dicodes, they were all clearly over temp where 0.0035 was exactly at temp. I'll be re-checking it again soon on other mods.

 

[2legsshrt]

If you're building for the STM, get 26 gauge.

Thats what I'm using now and I really like it but I built an 8 wrap contact coil with it came out at .43 and the Ti mode seemed a little closer when I tried it but I'm not too hot on contact coils. The 26 works great in Ni mode at 260-275 or the Ti mode at 480 would just like to see if the higher resistance coil would work at a temp closer to what it should be. Like I said I love the 26 but would just like to experiment with the Ti mode and see if it works. My contact coil came in at .43 and seemed to work good at 420 so if I went a little highery resistance maybe it would work. It's probably a waste of time but just an experiment like I say. And yes it is an STM all I use any more and the SXM except for at night I use my S which is also very good with a 1.5 Kanthal coil almost as good almost. Its weird my S the battery cap works the best of all of them. Smooth as butter. Next time I clean my battery contacts and cap I'm going to try putting a little tiny bit of Noaloc on it and see if it helps. It's also weird I have 3 M's and one of them is harder to place the cap then the other 2. I'm just playing around will not be buying the ML but maybe the one they are supposed to come out with in December. It is supposed to be a major update.

 

[Mad Scientist]

I'm not sure where Steam Engine gets that number from.

The spreadsheet that @vapealone maintains, which uses a comprehensive study of near-pure Titanium as its source, indicates 0.0035 in the vaping range. That is also the figure I verified with my own temperature probing with Titanium. I tried 0.0036 right up to 0.004 and at least on the Dicodes, they were all clearly over temp where 0.0035 was exactly at temp. I'll be re-checking it again soon on other mods.

I don't know either lol. It is close enough.

I got my thermocouple interface to work (finally) so I need to find a block of time to get some data.

 

[RainbowFartingUnicorn]

Also has anyone tried or thought about a staged heating coil? Like a parallel wrapped 26 awg with a fused clapton would provide fast ramp time as well as enhanced flavor. Or would the resistance jump from the 26 awg too much and start limiting the coil? I wouldn't think so as overall measured resistance would be averaged over both of the parallel legs.

Sent from my SGH-I337M using Tapatalk