DNA250C Replay - what's the big deal?
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The what, Exactly, does Replay do if it Doesn't Regulate Coil Temperature?
That's a question for someone who works at Evolv.
I gave plenty of points to think about, Kanthal being a pretty big hint that the decision making of replay isn't based on limiting temperature. It may limit temperature in some situations and it may not in others, material resistance obviously isn't the sole deciding factor.
It really doesn't have to do anything to have a big market. If 80% of us who buy their chips don't use TC, than 80% of their current customer base doesn't care if it's amazing or not. Most of us buy the boards for how well they do wattage, and we will continue to do so with or without replay.
I do get your point that they could significantly expand market share if it is as advertised. I'm skeptical, because Temp Control was their most recent "Game Changer", but we shall see.
I can tell you Exactly what Replay does. And How it does what it is supposed to do. It isn't exactly Rocket Science.
LOL
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Aah... But Everyone and their Brother's Brother does TC.
Think if you could Only get what Replay Does from Evolv.
That may be. But if the ohm reading is off then the temperature is off. Mods aren't exactly 100% accurate. You still don't know the true temp
I'm kind of confused, I thought that replay was kind of billed as "the tc that works for people who don't want to fiddle around with TC"??? I kind of thought that was the selling point but if kanthal is being now cited as something that can work with replay then....
What exactly, is doing/reading what? And, it seems as if from the discussion, there isn't a way of knowing for sure whether or not "Replay" is going to keep you out of the danger zone of high temperatures, for sure?
So, I remain confused but I'm glad I didn't order one yet. I hope more will be revealed as this all seems like, highly speculative to me, at a certain point. I'm fairly sure my "best puffs" aren't supremely high in temp, but I'd want the replay function to TELL me, I'm not spending that amount of money on a mod that can give me my "best puff" I can already kind of do that myself with a lot of my mods, honestly.
I'm confused I guess....
Anna
What exactly, is doing/reading what? And, it seems as if from the discussion, there isn't a way of knowing for sure whether or not "Replay" is going to keep you out of the danger zone of high temperatures, for sure?
So, I remain confused but I'm glad I didn't order one yet. I hope more will be revealed as this all seems like, highly speculative to me, at a certain point. I'm fairly sure my "best puffs" aren't supremely high in temp, but I'd want the replay function to TELL me, I'm not spending that amount of money on a mod that can give me my "best puff" I can already kind of do that myself with a lot of my mods, honestly.
I'm confused I guess....
Anna
Lets Wait and See just how well Non-TC Alloys like Kanthal or NiChrome(s) actual work.
My Prediction is they Won't work all that well under All conditions.
That is exactly why I made my naggy post about it being called some kind of TC
Correct, there's no way to set or monitor temperature while in Replay mode, not on the mod and not in escribe.
All that's keeping you from "dangerous" territory is your own experience and sense of taste (to a degree).
How dangerous that really is... mikepetro has some good posts and his own research over in the cancerino thread.
New studies find carcinogens in vg and pg at high temps, even in tootle puffers
As to how exactly it works... it's a black box with a button that does vape-y magic
Yep, if it was working perfectly in every situation then it wouldn't be an undocumented feature.
Man I was kind of happier being uninformed. 
I mean, I can tell, to an extent if my tanks are overheating, but I'm not sure if my mod can. This just seems like (at least from what I gather) providing the same "puff" each puff, which could easily heat up one's tank if chain vaping. It's like a step down from TC but using a MUCH MORE expensive mod to do it, sorta.
I guess if evolve is saying that 80% of folks not using their more advanced modes, this should have great market share....
Only, if it's just about getting a repeatable puff that is good, there are plenty of mods I seem to be successfully doing that on already.... I don't really get what this is "giving" a new user....
Anna
I mean, I can tell, to an extent if my tanks are overheating, but I'm not sure if my mod can. This just seems like (at least from what I gather) providing the same "puff" each puff, which could easily heat up one's tank if chain vaping. It's like a step down from TC but using a MUCH MORE expensive mod to do it, sorta.
I guess if evolve is saying that 80% of folks not using their more advanced modes, this should have great market share....
Only, if it's just about getting a repeatable puff that is good, there are plenty of mods I seem to be successfully doing that on already....
I don't really get what this is "giving" a new user....Anna
Actually it is designed to mimic the "flavor" profile of a given hit. You get a hit with just the right preheat, just the right punch, and just the right flavor notes for your juice and then save that hit. Depending on your build, big claptons for example, the temperature profile might be a curve from the beginning of a hit until the end. REPLAY is duplicate the curve that you saved.
Here is a screen shot, I saved the first hit, and then used replay to duplicate it.
Now look at three hit in just straight temp control with replay turned off.
There was definitely a more repeatable "flavor" profile in the first 3 hits.
Okay so I'm confused... You can use replay AND temp control together? So, you're repeating your "sweetest" TC hit? Or you can use replay in straight wattage mode. Sorry to be so dumb regarding this.
Also, yeah, okay the first graph looks more similar... And you're saying that it makes a noticeable difference in the vape quality and etc.?
Anna
Also, yeah, okay the first graph looks more similar... And you're saying that it makes a noticeable difference in the vape quality and etc.?
Anna
Every DNA that I have tested, when properly set up, was within their stated accuracy of +/- 10 degrees F. I have measured dozens of atty coils with industrial instrumentation in order validate this.
Yes, technically what it is measuring is resistance, however the resistance directly correlates to a specific temperature. In industry we use what are known as "RTDs" all of the time to get very precise temperature measurements. The trick to temperature accuracy is making sure your resistance is accurate.
The basics of getting the most accuracy out of your TC Mod
How to measure the temperature on your own atty.
If I understand it correctly mikepetro "cheated"... he set up the puff in TC, then switched to replay and recorded it ^^
Edit:
nvm I got wrong what mikepetro did
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Yep... That's what Replay does. It builds a Temperature Curve over a Discrete amount of Points for a given Time Interval.
And then it tries to Match the Saved Temperature Curve by Adjusting the Coils Temperature in "Real Time" using a Prediction Resistance Algorithm.
So it Doesn't really Matter what the User Did with Setting such as Pre-Heat. Or if the Wicking starts to Fall Off because the e-Liquid is Thick.
All Replay does is Record the Hit you say you Like. And then tries to Match the stored Temperature Curve to what is Happening while the Power Button is being pressed.
BTW - Isn't Replay "Adaptive"?
Meaning, isn't the 2nd or 3rd Hit Closer to the Recorded Temperature Curve. Or in lay terms, it "Learns as it Goes".
Very true, if your resistance is not accurate for some reason, then temperature extrapolation will also not be accurate.
However, REPLAY doesnt care about temperature extrapolation, if you replicate the "Live Ohm" trace from hit to hit, then the hits will be the same.
If you care about the temp, then calibrate your mods resistance variables and look at the replay hit in Device Manager.
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