DNA 200 Watt
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Seems very similar to @Darkly spectr problem earlier in this thread but I'm not sure if he resolved his problem or not and if so how.
https://www.e-cigarette-forum.com/forum/threads/dna-200-watt.680148/page-200#post-16677071
The cold to hot ohms looks right, it's not a wicking problem since it works good on your other mod, only thing left is the TCR value. Change it till it seems to vape correctly keeping the line linear and leaving the 68 -70 F where it's at. You can grab the temp points with you mouse and drag them or right click them and enter desired value. Upload to device and see what changed, repeat as needed.
Oh, I forgot to add, after you get it where you think it's good do a dry cotton burn test to see what protection it has. (perhaps using a dripper atty)
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I'm having some issues with my Efusion DNA with Arctic nickel coils. Using the factory Nickel profile, 48W, 470* with 100W preheat for 1 second I can not for the life of me get a nice warm vape. The mod is limiting as it's supposed to, however it's not a smooth, gradual vape at all. It's instantaneously reaching 470 and dropping my wattage down in the 20's. It does this even with 1W preheat. It's anemic and tasteless. I'm coming over from the SX350J and never had this sort of issue. My Starre coils work just fine with the factory Nickel setting. Anyone else have this issue? Think it could be due to the higher resistance of the Arctic coils? They are resting at .243-.250? Here's what I'm getting in monitor. My case resistance came out to .0045 if that helps.
Or you have entered a falsely high value in mod resistance so it is not understanding your coil at all. Try it with 0 in mod resistance to start with.
I didn't set up the case resistance right away. It did it even with it at 0.
Are your cold resistances shown as identical on the two devices? I've noticed the efusion 510 gives me a better connection (sometimes as much as 0.02 or 0.03 ohms better) than my other mods, including other DNA 200s. Efusion 510 has a strong spring. If the 510 connection is better, it will more accurately show a lower cold resistance reading which will reduce actual temp at the coil (but reduce it to more accurately reflect the temp setting). You might just be accustomed to a hotter vape without knowing it due to relatively high contact resistance of other mod's 510s. I was until I got the efusion. I still like the hotter vape but now at least I know what it really is lol.
That is definitely something to think about. The Boxer had a Varitube 510 and would usually read .245 or so. The Efusion does have a ridiculously strong spring. It's been reading about the same as far as I recall. I'll have to play around some more. I'm still trying to understand the graph in Escribe under "Custom" TCR. The difference in how the X and Y values change the vape.
Any change in the curve which increases the TCR at your set temp will increase delivered temp, and vice versa. X is temp and y is a normalized resistivity value for that temp (normalized to 68 F if I remember right). An easy way to futz with it is set a reasonable temp (like 450 F) and enter a single TCR value in "special." I don't remember the wire you're using but I use 0.0041 for the unkamen Ti I have. Adjust the TCR up or down until it matches the vape you are familiar with from the other mod. It will likely not be "accurate" because the other mod tends to run hot, but it will heat up the vape to the way you like it and control temp for a consistent vape experience.
I wanted to stop back with some results for you guys. I had a chance to fiddle this afternoon with the curve and a couple of other things in an attempt to have my Arctic nickel coils to work the best they could. I inputted a TCR of .0062 which gave me two points. I then dropped the Y axis at the 68 mark down to .87 from 1.00 (I'm still a little unsure exactly what that number represents in detail)
Running at 45-48W, 450* and it seems to be working well. Just ran the tank completely dry and no burning at all. I also locked the resistance in at .240ish which is close to what it always read on the SX chip. Thank you all for the input. While I'm a little frustrated that I had to tweak such a pricey mod to get it to work right, it's bittersweet due to the fact the tweaking can be done so effortlessly.
Running at 45-48W, 450* and it seems to be working well. Just ran the tank completely dry and no burning at all. I also locked the resistance in at .240ish which is close to what it always read on the SX chip. Thank you all for the input. While I'm a little frustrated that I had to tweak such a pricey mod to get it to work right, it's bittersweet due to the fact the tweaking can be done so effortlessly.
did you plotanymore points than just the one? i tried that and my result were poor. i had to add a few temp points to the graph for it to work properly. mainly in my temp vaping range.I wanted to stop back with some results for you guys. I had a chance to fiddle this afternoon with the curve and a couple of other things in an attempt to have my Arctic nickel coils to work the best they could. I inputted a TCR of .0062 which gave me two points. I then dropped the Y axis at the 68 mark down to .87 from 1.00 (I'm still a little unsure exactly what that number represents in detail)
Running at 45-48W, 450* and it seems to be working well. Just ran the tank completely dry and no burning at all. I also locked the resistance in at .240ish which is close to what it always read on the SX chip. Thank you all for the input. While I'm a little frustrated that I had to tweak such a pricey mod to get it to work right, it's bittersweet due to the fact the tweaking can be done so effortlessly.
That's all Escribe set up when I inputted the TCR manually. I may try adding one in the area of my set temp to see what that gets me, but right now it seems to be working good.
I wanted to stop back with some results for you guys. I had a chance to fiddle this afternoon with the curve and a couple of other things in an attempt to have my Arctic nickel coils to work the best they could. I inputted a TCR of .0062 which gave me two points. I then dropped the Y axis at the 68 mark down to .87 from 1.00 (I'm still a little unsure exactly what that number represents in detail)
Running at 45-48W, 450* and it seems to be working well. Just ran the tank completely dry and no burning at all. I also locked the resistance in at .240ish which is close to what it always read on the SX chip. Thank you all for the input. While I'm a little frustrated that I had to tweak such a pricey mod to get it to work right, it's bittersweet due to the fact the tweaking can be done so effortlessly.
What you did should work fine. You essentially just increased the TCR.
The curve is resistivity normalized to 68 degrees F. So for a simple two point curve, 68 is 1 and 800 is whatever would be expected multiplying an approximated TCR by (800 - 68). If you adjust it so 68 is less than 1 and leave the point at 800 where it was, all the values along the curve from 68 and above change except the 800 point -- you changed the slope of the curve above 68 by decreasing the "starting" point. The increased slope represents an increased TCR at every point on the curve except below 68 where the slope was decreased (and since no one vapes at such low temps, who cares lol).
The resistivity of real wire isn't perfectly linear so a more accurate curve requires more points, but the wire types typically used are linear for all practical purposes within the limited range of vaping temps most people would tend to use. If 68 is 1 and the TCR at 450 F is 0.004 per degree F, then the 800 point would be (800 - 68) x 0.004 = 2.928. Bingo, a curve accurate at 450 F. It won't be super accurate at 400 F and it won't be super accurate at 500 F, but it will be bang on right around 450 F and pretty much close enough from 400 F to 500 F.
The curve you created is 68 at 0.87 and 800 at 3.52. So to calculate the TCR that will result, it's 0.87 x (800 - 68) x TCR = 3.52.
Solving for TCR yields TCR = 3.52 / (0.87 x (800 - 68)) = 0.00553.
The curve before you changed it was TCR = 0.0048.
Keep in mind that the TCR value you enter in escribe is entered in Ohm / degree K.
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I think I follow. It's working beautifully now. Thanks for all your help and wisdom. I'm still wrapping my head around TCR curves and the effects of each value.
A good place to start: https://www.e-cigarette-forum.com/f...herm-nife30-coefficient-of-resistance.676506/
Yes I started in on that thread a while back. Haven't had enough time to just sit down and pick through it for the info I'm looking for.
I am sorry I was a pest guys. I see what is happening but I do not understand how this works. at my wattage I am hitting the temp and it is limiting. I don't know why the dna takes much more power than the sxm. I am fine if I go 560f at 70w but that seems like too much. I have no idea. I am single coil ni200 at . 1 ohms. maybe I need to go lower resistance.
The SXM runs hotter than actual. If you want the DNA 200 to behave the same way, increase the TCR and the preheat punch. I can tell you for certain that the DNA 200 can deliver more heat than you can handle lol.
Also, go in to escribe and use the drop down next to the temp protect message to change the warning message for temp protect to display temp. Hitting the set temp is not an event to be warned about; it is what the board is supposed to do (IMHO).
Not sure where your reference information is from but I run the same tanks between the SXmini m and DNA200 daily and run them at the same temperature. The one thing I do notice with the DNA if Refinement is left on it will read a .15Ω factory coil down as low as .12Ω - .13Ω over time and deliver a fairly anemic vape. On the other hand it will burn a hole in the back of my throat and burn a coil if I go outside to work in the yard as it refines the resistance upwards, but if I lock the resistance when I install the tank it's almost as consistent as the SXmini m aside from Preheat.
Here's a screen grab from Tasteyourjuice.com that seems to go with what I'm experiencing with temps being pretty similar in comparison. Actually show's the SXM (SX350J) to run a bit cooler than the DNA200. I've seen a hand full of reports of this anemic vaping experience on the DNA200 and I suspect it has to do with either the Refinement reading the coil resistance slightly lower than it actually is or the Mod resistance being incorrect. I imagine @Smeef work around would work for those that are having this anemic problem.
I use factory Aspire coils exclusively and have not ever encountered what you have with them. My experience is a bit different than yours and no doubt mine and yours are both consistent with our experience. My 0.15 ohm coils almost always refine to 0.15 ohms (normal) and only rarely drop to 0.14+ ohms (normal). Never have I experienced anemic and/or throat or coil burn.
I noticed some variances with the Kanger coils (anemic and or hot burning) but think it is the Kanger design and not the DNA 200 refinement being flawed. Refinement does what it is designed to do and locking ohms is a feature some use but I don't have a need or desire to use.
The current Aspire coil in my tank has been there for 2 weeks and is still reading 0.151 ohms (normal ohms) and a cold ohm's reading of 0.147 ohms. Readings such as this have been consistent since July with the DNA200 (using Atty Analyzer) and prior to that date using the DNA25 and 40 (measured with an ohm's reader).
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