Titanium wire, vaping and safety

[Rossum]

Well, FWIW, sando7's readings strike me as low.

My typical Ti coil is 3 strands of 30 gauge grade 1 TI, tightly twisted, with 7 turns around a 2mm (actually 5/64") bit, and that comes out to right around 0.25 ohms.

So I'd expect his 2 strands on 2.4mm to come out closer to 0.4 ohms, and Steam-Engine.org concurs.

 

[tchavei]

I wish steam engine would concur with any of my builds. Mines are always way lower then they should (ni 200) . Maybe it's the wire, don't know.

Regards
Tony

Sent from my keyboard through my phone or something like that.

 

[roxynoodle]

So now that you're awake.... ?

Regards
Tony

Sent from my keyboard through my phone or something like that.

The Erlk is bathing, and I will get to it soon. I need to read my sx manual, too. I'm supposed to try to burn cotton? Be glad its not raining because if it does burn, I don't want the stink in the house.

 

[tchavei]

The Erlk is bathing, and I will get to it soon. I need to read my sx manual, too. I'm supposed to try to burn cotton? Be glad its not raining because if it does burn, I don't want the stink in the house.

Yes. It's supposed to set it at a low temperature like 300F and keep pressing the fire button and watch the dry coil message. If the behaviour is the same like theotherSteve's with 24g, it eventually should char the cotton. At least that's what I understood.

Regards
Tony

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[tchavei]

Not sure what is going on but I just managed to burn cotton on the sx. 0.17ohm space build, Ti 24g on RBA deck of subtank wicked with muji OC. Set for 20J and 350F. So the problem is that it goes almost straight away to Dry Coil message and all is well, however if you keep the button down it keeps trying from scratch. After a 5 cycles of this the cotton starts to burn. Just to be sure I took the deck off and put it on my chinese DNA40-clone VF knockoff and repeated. Holding down fire button it keeps going but power sits around 1W or so and essentially all is fine.

On the sx, the burn mark accumulates on one of the end wraps so it might be a hot leg issue. I dry pulsed in power mode to light it up a bit but doesn't look like a hot leg - looked pretty good in fact except now it is white!

I think there might be an issue here. It seems to fine on a single pulse but it seems to put a good deal of power through the coil before it detects a dry coil situation. The other problem is that it then tries again...and again... and eventually enough heat accumulates such that the wick cooks...Maybe this isn't a problem in a real world situation but it doesn't seem quite right to me..

Can someone else have a go, maybe with Ni using continuous fire ?????

This is what was posted.

For comparison sakes, I would prefer 300F because Ti should be 100F lower than ni and my dna 40 starts to leave yellow streaks on cotton at around 400F-410F

Obviously on a dry Virgin cotton

Regards
Tony

Sent from my keyboard through my phone or something like that.

 

[roxynoodle]

As soon as Merlin is done eating, I'll start figuring this out. She's in my lap. For those that don't know, she's blind so she's happiest and most secure being with me. And I let her get away with a lot . She's very intelligent and manipulative

 

[roxynoodle]

See this is confusing. I thought we weren't supposed to dry burn the ti. And why do I want my wick to burn?

 

[sando7]

Well, FWIW, sando7's readings strike me as low.

My typical Ti coil is 3 strands of 30 gauge grade 1 TI, tightly twisted, with 7 turns around a 2mm (actually 5/64") bit, and that comes out to right around 0.25 ohms.

So I'd expect his 2 strands on 2.4mm to come out closer to 0.4 ohms, and Steam-Engine.org concurs.

here ya go, 7 wraps double twisted 30ga grade #1 TI on a 3/32 bit

proofs in the puddin

 

[tchavei]

Dry burning is way over 800F. You're not dry burning... You're heating


You actually don't want your wick to burn and the experiment is to confirm or dismiss theotherSteveS experience with Ti.

1. We know the dna 40 doesn't burn a dry Virgin wick at say 390F

2. We know the sx mini doesn't burn a Virgin dry wick at say 400F

3. We know that with 24g Ti there is also no burning at 350F on a dna 40

4. We know that with 24g Ti on a sx mini set at 350F there is no scorching initially but if you insist firing the mod 5 or 6 times in this condition, the cotton will start to scorch (which it shouldn't)

5. Some of us believe that the issue in 4 might be related to the wire thickness so we would like to someone test the same condition using 28g Ti wire (you)

Now remember, the test were all performed with Virgin dry cotton... I mean cotton that has never been wet. Once cotton is wet, the scorching temperature rises significantly so in real life usage, you won't ever mark or scorch cotton under 430-440F.

See this is confusing. I thought we weren't supposed to dry burn the ti. And why do I want my wick to burn?

Regards
Tony

Sent from my keyboard through my phone or something like that.

 

[Rossum]

here ya go, 7 wraps double twisted 30ga grade #1 TI on a 3/32 bit

proofs in the puddin

OK, that's not what I would consider "tightly twisted", which explains some (but by no means all) of the discrepancy.

FWIW, this is "tightly twisted".

Where did you get your 30 gauge Ti? I gotta believe it's different than mine, which came from Rio Grande.

 

[sando7]

25' roll - 30ga - Grade 1 CP Titanium
Wire Dia.: 0.016" ..."W-JSTI30"

about 3/4 down the page
https://theringlord.com/cart/shopdisplayproducts.asp?id=123&cat=Titanium+Wire


well obviously i don't have your experience yet, but i'll get there with the help of people like you.....and the vape i'm getting is fantastic, what can i say!

details on discrepancy please?

 

[tchavei]

OK, that's not what I would consider "tightly twisted", which explains some (but by no means all) of the discrepancy.

FWIW, this is "tightly twisted".

Where did you get your 30 gauge Ti? I gotta believe it's different than mine, which came from Rio Grande.

That's just beautiful...

Regards
Tony

Sent from my keyboard through my phone or something like that.

 

[ukeman]

I'm done with the tax returns

So tomorrow I'll try to set up the sx with 28g ti, Ukeman, but I feel like I have no idea what I'm doing

Looking at how the experts are using twisted Ti wire, I can not consider "twisting" thinner Ti at this point; just not me...
I imagine you would use it (28g Ti) as a conventional spaced coil Roxy?

I just want to see how it will work on the SX without getting that huge heat flux issue that comes with the 24g Ti.

 

[Rossum]

details on discrepancy please?

Well, it's just that your coils have a lower resistance than they theoretically should and I'm puzzled why, since mine end up reading right what they should.

I can think of the following explanations:

1) You've got a short between some of your coils. I think this is unlikely since you say your results are consistent.

2) The resistivity of your wire is lower than it should be. I'm not sure how this would be possible, since impurities in titanium generally increase its resistivity.

3) The wire you've got is a bit thicker than it should be. 30 gauge is supposed to be 0.255 mm. I don't have that many decimal places on my calipers, but I get readings of 0.25 or 0.26, so it's in the ballpark. Can you check yours?

 

[Rossum]

Looking at how the experts are using twisted Ti wire, I can not consider "twisting" thinner Ti at this point; just not me...

For me started as "necessity". Way back when, all I could find was 30 gauge and 24 gauge, and I found the 24 gauge somewhat difficult to work with. Not unusable by any stretch of the imagination, but it IS titanium after all.

 

[Croak]

Anyone find it amusing that this woman:

Wrote a hit song called..."Titanium"?

Coincidence? I don't think so!

 

[roxynoodle]

Ok, here is what I have. I did 8 spaced wraps of the 28g ti on a 3/32" (2.4mm) bit. Its reading 0.556ohm. Isn't that much too high? Not sure here if I should take off a couple of wraps or if something else is wrong?

 

[roxynoodle]

Well, Steam Engine says that's about right for the coil I made, but I'm not sure if that's ok for using tp, or should I try 6 wraps?

 

[Rossum]

Why do you think that's too high?

 

[tchavei]

Sounds great to me.

Regards
Tony

Sent from my keyboard through my phone or something like that.