TC beyond Ni200: Nickel Purity, Dicodes; Ti, SS, Resistherm NiFe30; Coefficient of Resistance
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Gee my sampler was 28 gauge Ti, SS430...good stuff
I've got some 28g SS316 but it's been suggested to me that it's mislabeled SS430? Anyway to check?
The 430 is magnetic, 316 is not
Someone said something about the resistance of a 1inch piece?
(thanks for the reply, I'll check if it's magnetic when I get home - I don't think it is... 99% sure it isn't actually)
So what's a good gauge for Nife70? I see a bunch on eBay ranging from 36g to 24g in varying lengths.
(I made this mistake with Ti, got 30 & 32g and that's too thin. I popped a coil once, wicked and wet hit the button and saw fire! Plus the resistance is always hi unless I use very few wraps)
(I made this mistake with Ti, got 30 & 32g and that's too thin. I popped a coil once, wicked and wet hit the button and saw fire! Plus the resistance is always hi unless I use very few wraps)
I tend to vape around 450f and 60w (kind of set it and forget it) and will adjust the temp up/down but usually leave the watts at 60w.
Playing with the preheat is how I got the Ti to actually burn.
With NiFe70 you need to plan ahead on what your wanting to build.
As an example, 8 wraps of 28AWG with 3mm ID:
As an example, 8 wraps of 28AWG with 3mm ID:
- Kanthal A1 = 1.73 ohms
- Ti G1 = 0.561 ohms
- NiFe48 = 0.442 ohms
- NiFe70 = 0.239 ohms
- Ni200 = 0.115 ohms
I apologize if this question has been answered.
I've been building my coils with SS316L wire.
I wonder if it is better to use thin or thick wire and if it is better to build high or low resistence
coils to get a more accurate TC on a dna200 device?
I've been building my coils with SS316L wire.
I wonder if it is better to use thin or thick wire and if it is better to build high or low resistence
coils to get a more accurate TC on a dna200 device?
The TCR of the wire material is not effected by the resistance of your coil build. Check out the SE site:
Wire wizard
The following is true regardless of which TC mod you are using.
When working with TC there are two things to consider: the TCR of the wire and the base resistance of the coil. (some of us also consider the AWG and mass of the coil but that is another story)
Given the same wire type and obviously same TCR value, you are right in thinking that a higher base resistance coil will change resistance MORE going from room temperature to vaping temperatures than a lower resistance coil does.
You are also right in thinking that in general thicker wire has less resistance then thinner wire.
There is a chart that gets (re)posted on this forum that generally advises builds of >=0.5ohm for the low TCR TC wire types.
The challenge for the TC builder is choosing a wire type and gauge to match the wire surface and RBA build area along with fitting within the optimum resistance and power window of their mod. (least not forget having acceptable coil durability - IE can it be rewicked?)
While I have many different types of TC wire in stock in sizes 22-37AWG, most my builds are in the 28-30AWG range. (I'm currently vaping on 30AWG NiFe52 ribbon wire, my current favorite)
Or simply: Higher res and higher tcr values offer higher tc accuracy. That said, I have never worried much about whether or not my tc mods are displaying an accurate temp reading. What's more important to me is how it vapes. Too cool; turn up the temp, too hot;turn down the temp.
As @GeorgeS said, selecting a proper gauge, diameter and wrap count for a given tc wire type to achieve a good build fit while still staying within your mod's workable range is the trick.
Most of my tc builds are with 24g Ti or 25g NiFe52 alloy fwiw.
As @GeorgeS said, selecting a proper gauge, diameter and wrap count for a given tc wire type to achieve a good build fit while still staying within your mod's workable range is the trick.
Most of my tc builds are with 24g Ti or 25g NiFe52 alloy fwiw.
FYI: for all the NiFe likers Zivipv now has:
NiFe48-0.8x0.1-25m NiFe48 Flat Wire 0.8x0.1mm / .031*.004" - AWG 28
in stock and is shipping.
What is not to like? Mass and resistance of 28AWG NiFe48 but with a wick contact surface area of AWG20.
I currently have two builds of 3.0MM ID 3-4 wraps in service.
NiFe48-0.8x0.1-25m NiFe48 Flat Wire 0.8x0.1mm / .031*.004" - AWG 28
in stock and is shipping.
What is not to like? Mass and resistance of 28AWG NiFe48 but with a wick contact surface area of AWG20.
I currently have two builds of 3.0MM ID 3-4 wraps in service.
Wonder if I could run some 25g NiFe through a pasta press like a coil art friend of mine. He makes all of his nichrome and kanthal flat wire that way.
Need some help here: HELP
I received some 25 gauge SS430 from Crazywire today. The TCR value for Unkamen's 430 works well for me with Unkamen's ss. It barely make any vapor using CW ss430 and SE CSV and CW ss430.
Here is my cold and hot ohms (hot = around 450F)
0.306 cold
0.490 hot
If I'm not mistaken a TCR can be estimated using that info...anyone?
I received some 25 gauge SS430 from Crazywire today. The TCR value for Unkamen's 430 works well for me with Unkamen's ss. It barely make any vapor using CW ss430 and SE CSV and CW ss430.
Here is my cold and hot ohms (hot = around 450F)
0.306 cold
0.490 hot
If I'm not mistaken a TCR can be estimated using that info...anyone?
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@dwcraig1
After a bit of thought and review of my past posts in this thread I believe you are making a bigger puzzle than necessary for yourself.
Wouldn't it be simpler to:
(a) use the expected TCR of 138 (with proper placement of zeros) saved to your device;
(b) open Device Manager to observe how close you get to the Set Temperature with minimal variance;
(c) adjust the TCR number until you get a good fit, likely upwards I would think, and settle on that number until CW corrects itself (gets its act together).
Recall I did that with NiFe 48 allowing me to use the bog standard CSV AND my own TESTED TCR in separate Profiles.
I have since given up on the modified TCR because the curve works beautifully.
HTH
After a bit of thought and review of my past posts in this thread I believe you are making a bigger puzzle than necessary for yourself.
Wouldn't it be simpler to:
(a) use the expected TCR of 138 (with proper placement of zeros) saved to your device;
(b) open Device Manager to observe how close you get to the Set Temperature with minimal variance;
(c) adjust the TCR number until you get a good fit, likely upwards I would think, and settle on that number until CW corrects itself (gets its act together).
Recall I did that with NiFe 48 allowing me to use the bog standard CSV AND my own TESTED TCR in separate Profiles.
I have since given up on the modified TCR because the curve works beautifully.
HTH
I find it easier to just drag it with my mouse, this suff CW430) is closer the NiFe52 (TCR) than any of the other materials listed in SE. I'm at work now so I don't have access to my Velocity but will do a dry cotton burn test when I get home to judge the setting that I'm using. It is probably pretty close now.
Edit: I was going to figure it using my Dicodes but EScribe was faster for a lazy guy like me.
Edit: I was going to figure it using my Dicodes but EScribe was faster for a lazy guy like me.
.00305 for this one.(approx)
After dry cotton burn test I'm using 0.00258 for TCR (Crazywire SS430)
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