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The right TCR
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#1 (permalink)      12/17/2016 6:17:31 PM US Central   quote/reply + tips
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HybridMask
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The right TCR
So, some guys posted that these UD wire have a TCR close to a 304 SS no 316L SS.
I am a bit confused myself... I made a spaced single coil with 316L SS 26 awg (this one of the post) with an ID of 3mm, the reading is 0.83 ohms.
The build is centered btw the posts and the coil is just a little bit above the af. The RDA is a Stumpy by the way.
I am certain that the amount of cotton is correct. I guess.
The thing is that I am using the TCR of 92 and 101, and I can't find which is the correct one. I am using the Evic VTC mini with firmware version 3.04 by the way.
I was getting low vapor with 50W and no preheat, but then @XxRingoxX told me to lower the power to something like 25W and it worked better, but still I cand find the right TCR for the Wire.
With TCR of 92, at 220C at 30W with 0.83 ohms coil, after the second hit the tc protection activates.
With TCR of 101, at 220C at 30W with 0.83 ohms coil, the tc activates a bit later, but still, I can't find a way to tune the tcr. I tried 94 and it was far worse.

HybridMask marked this question as answered on 12/18/2016 at 10:08 AM
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MitchL
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Nice! Try around 4 or 5 raps on your 3 mm coil for 35 W! You have a lot of deck space. A 4 mm coil with 4 or 5 raps will work at around 50 W!
#2 (permalink)      12/17/2016 6:42:09 PM US Central   quote/reply + tips
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TruckinVapor
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Try a TCR of 112 and see if that brings it closer to your set temp.
Living is the only thing worth dying for...
#3 (permalink)      12/17/2016 7:15:18 PM US Central   quote/reply + tips
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HybridMask
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TruckinVapor wrote:

Try a TCR of 112 and see if that brings it closer to your set temp.



The cotton is getting more burnt with 112, but no dry hit. I am new to TC, so I don't know what is a "normal" TC setting xD

#4 (permalink)      12/17/2016 7:20:31 PM US Central   quote/reply + tips
MitchL
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Set the temperature to 420 F and adjust the TCR until it no longer burns cotton in a dry burn cotton test. Forgive me of my ignorance, but I don't know if the Evic has a zero liquid warning.

Are you using spaced coils?
#5 (permalink)      12/17/2016 7:29:08 PM US Central   quote/reply + tips
MitchL
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#6 (permalink)      12/17/2016 7:36:38 PM US Central   quote/reply + tips
MitchL
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You probably need to reduce your available power so that it doesn't burn the coil. Reduce it down until it doesn't over shoot the desired temperature. For a single coil I set my watts down to 30 to 50 depending on the size of the coil. Smaller coils need less watts.

Edit: Smaller coils have lower resistance with the same size wire!

Edited on 12/17/2016 at 7:51 PM. Reason:
#7 (permalink)      12/17/2016 7:38:43 PM US Central   quote/reply + tips
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Mitchmangr
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Dear Hybrid

I have the same mod, firmware and wire as you. I personally have approached this problem from another direction. I choose to use the default SS mode, keep the resistance unlocked, and keep a close eye on my baseline ohms*. I am curious of anything that triggers a "old coil/new coil" event and keep my TC watts and set temp as low as possible to avoid prematurely blackening my coil and cotton. I have discovered that baseline ohms can vary on a fixed build, which I consider a good thing, and see how that subsequently affects the vape quality (if at all).

Recently, I've been running the Github custom firmware using the "sweet" algorithm, but went back to the default algorithm when I started using twisted pair UD 30 SS316L wire.
In short, everyday is a learning experience with TC on the Evic mini.

I conceed that different TCR values can give "better" vaping experiences, but until I've exhausted all the variables involved with wicking, coil builds, air flow etc. etc. I'm happy to leave TCR values alone.

(with apologies to Douglas Adams) "The TCR for life, the universe, and everything is 42. The problem is we don't really know what the question is."


*"baseline ohms" I define as the measured resistance of the coil after a long period of inactivity eg first thing in the morning
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#8 (permalink)      12/17/2016 7:54:23 PM US Central   quote/reply + tips
MitchL
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Looks like it is a good time to update your Evic mini! Looks very accurate with the V3.0!!!!!!!!!1
#9 (permalink)      12/17/2016 7:54:31 PM US Central   quote/reply + tips
sushi6
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Default tcr for 316 is 120 on vtc and probably all JT chips.


Adjust your temp down until you are happy. Could be anywhere from 140 to 220.
#10 (permalink)      12/17/2016 7:56:24 PM US Central   quote/reply + tips
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HybridMask
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MitchL wrote:

Set the temperature to 420 F and adjust the TCR until it no longer burns cotton in a dry burn cotton test. Forgive me of my ignorance, but I don't know if the Evic has a zero liquid warning.

Are you using spaced coils?



Hey, thank you for helping.

So, yes, I am using spaces coils. And the Evic regulate the temperature and power when you don't have juice. But again, with both 92, 101 and 112, I didn't get any dry hits, the difference is that with 92 the TC protection activate more frequently and perhaps that more accurate? Don't know... When I used with 50W the TC warning/regulation was almost instant.

After @XxRingoxX told me to set the power to 30W it worked better and he said to lower the power because my build is too high (0.83 ohms) for TC.
I saw the video from DJLsb Vapes, thats why a got the TCR 92. Hehe.
I will try what you said and will update later.

#11 (permalink)      12/17/2016 7:57:16 PM US Central   quote/reply + tips
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HybridMask
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sushi6 wrote:

Default tcr for 316 is 120 on vtc and probably all JT chips.


Adjust your temp down until you are happy. Could be anywhere from 140 to 220.



The TCR for 316L is different than 316, right?