Yihi SX350J Technology Discussion Thread

[classwife]

There are going to be some 2 week vacations handed out if this does not stop - got it ?

If you want to poke and agitate you can take it to another forum - you are not going to do it here and make it miserable for other members.

 

[dr g]

tanks dr g . I will have to pull one of my mods apart and probe the board and the coil to see if they are at similar temps once left standing

maybe i misunderstood what you asked? i'm talking about the coil calibration (setting the coil resistance)

 

[Mroutlaw]

Actually the SXJ deals with shaky builds somewhat better than the DNA, it is far less ... demanding in what it does. I honestly dont think this is by design, i think it's a byproduct of its less-than-accurate operation.

The transmission analogy doesn't hold up. With a manual transmission there is a meaningful amount of control over gear selection and powertrain engagement and disengagement. With the manual calibration there is no such meaningful control, all it is is an inconvenience and a place where inaccuracy and errors are introduced.

I'm trying to think of a good analogy but coming up blank right now. I was thinking like, black powder vs cartridges, but eh. Not great.

The calibration method of the SXJ is IMO a design error. It actually smacks of afterthought or bodge. I wouldn't doubt that yihi's first attempts at tc resembled the smok m80. there is still a hint of familiarity between the two experiences.

If you are referring to the atty lock feature, I don't think it was a design error. As an owner of a VS RDNA40, HanaModz V4D and the SX mini M, I like both chips and both have their pluses and minuses. One feature that I really like on the SX is the atty lock feature. As you said, it allows for shakier builds. I dont get the problem of one vape being perfect and the next one being very weak with the sx, which I do get with my dna sometimes. If this was a design error and not a good thing, why has evolve decided to add it to their chip on the latest revision?

I will also say that my KF4 performs well on both devices, but a little better on the SX and I think thats because of the atty lock feature.

 

[retird]

I have a question for those who are techno trained (EE, firmware designers, etc.) Preface my question with this observation: (the J board is in the SX mini M class)

In another thread Pbusardo's SX mini M two part video was posted. (watched it several times). He talks about and gives an interpretation of the scope information for temp mode. I also read all the posts in that thread where folks were talking about and giving their interpretation of the scope they had done also. In this thread I also read about the interpretation of scope readings posted here prior to Pbusardo's video. I noticed a wide variation in the interpretations. (I can't read a scope nor plan to learn) Pbusardo says in temp mode it is PWM. Others say different in their interpretation of their scope captures.

Thus my question: In temp mode can the operation of the J board (using dc-dc switching) be definitely determined as PWM, PAM, PFM or are scope readings really just a matter of interpretation where the design of the J board would need to be known to specifically determine what the scope is showing?

 

[dr g]

If you are referring to the atty lock feature, I don't think it was a design error. As an owner of a VS RDNA40, HanaModz V4D and the SX mini M, I like both chips and both have their pluses and minuses. One feature that I really like on the SX is the atty lock feature. As you said, it allows for shakier builds. I dont get the problem of one vape being perfect and the next one being very weak with the sx, which I do get with my dna sometimes. If this was a design error and not a good thing, why has evolve decided to add it to their chip on the latest revision?

They added it because people that don't understand TP complained, basically. Note that Evolv's Atty Lock is not the same as SX's manual calibration. Evolv still does automatic calibration, because that is the proper thing to do.

 

[peraspera]

oh! one more thing. do try watching the temperature when you vape. on many occasions I have seen the SXJ flat out exceed the set temp by 30-40 degrees or more. so it might be feeling hotter because it IS hotter lol

The temperature display seems to be reflective of the temperature I'm experiencing with with builds very close to the recommended .06. It hits the set temperature of 380° nearly immediately and the most it's been off was +24° and -9° but only very briefly. However, at .2+ oHms the screen temperature doesn't seem to waver much more than ±6–7° even when the temperature I'm perceiving does seem quite a bit more off for extended periods both on the high and low end than the +24/-9° I've seen with the lower oHm builds.

The SX350J specs show a range of .12—1.0 oHms for Joules mode. However, when explaining the hum that the chip produces Yihi made this statement:

Because the technology of M Class is the newest, and supports lower sub-ohm resistance, we suggest a 0.06-0.12 ohm base on Temco Ni-200. You can get the perfect experinces when you build the atomizer with the resistance 0.06ohm. However, if using the resistance above 0.3 ohm or Khanthal atomizers there will be variance and some unexpected behaviors may be observed in Joule mode.

If YiHi can't fix "unexpected behaviors" of their own chip well within their stated SX350J specs I'm highly disinclined to waste any more time trying to make heads or tails of what I've experienced. I'll stick to building for the SX Mini in the teensy oHm range where it seems to be producing the temperature/taste consistency I prefer and leave it at that.

 

[Vlad1]

I have a question for those who are techno trained (EE, firmware designers, etc.) Preface my question with this observation: (the J board is in the SX mini M class)

In another thread Pbusardo's SX mini M two part video was posted. (watched it several times). He talks about and gives an interpretation of the scope information for temp mode. I also read all the posts in that thread where folks were talking about and giving their interpretation of the scope they had done also. In this thread I also read about the interpretation of scope readings posted here prior to Pbusardo's video. I noticed a wide variation in the interpretations. (I can't read a scope nor plan to learn) Pbusardo says in temp mode it is PWM. Others say different in their interpretation of their scope captures.

Thus my question: In temp mode can the operation of the J board (using dc-dc switching) be definitely determined as PWM, PAM, PFM or are scope readings really just a matter of interpretation where the design of the J board would need to be known to specifically determine what the scope is showing?

I'm not an EE so I'll refer to someone that says they are. Yozhik probably answers your questions in his post most accurately.

SXmini M Class (TEMP CONTROL) | Page 111 | E-Cigarette Forum

Also Phil's Post-Review follow-up he corrected his useage of the term PWM.
Taste Your Juice | THE SX-MINI M-CLASS BY YIHI REVIEW

 

[jazzvaper]

If YiHi can't fix "unexpected behaviors" of their own chip well within their stated SX350J specs I'm highly disinclined to waste any more time trying to make heads or tails of what I've experienced. I'll stick to building for the SX Mini in the teensy oHm range where it seems to be producing the temperature/taste consistency I prefer and leave it at that.

I believe you are correct "P".

Feels like the early days of the DNA TC, with lots of differing opinions, none of them "wrong".

What I am doing is (1) finding settings that give me what I want, and, (2) waiting to see what the update brings. I suspect the firmware revision will substantially reduce the apparent inaccuracies we are seeing.

As such, I am ignoring the a YiHi specs and recommendations until I am certain they are accurate; that is, until I see a firm consensus of results among users. There does seem to be a consensus developing (of late) in the main SX Temp Control Thread.

 

[Vlad1]

The temperature display seems to be reflective of the temperature I'm experiencing with with builds very close to the recommended .06. It hits the set temperature of 380° nearly immediately and the most it's been off was +24° and -9° but only very briefly. However, at .2+ oHms the screen temperature doesn't seem to waver much more than ±6–7° even when the temperature I'm perceiving does seem quite a bit more off for extended periods both on the high and low end than the +24/-9° I've seen with the lower oHm builds.

The SX350J specs show a range of .12—1.0 oHms for Joules mode. However, when explaining the hum that the chip produces Yihi made this statement:

Because the technology of M Class is the newest, and supports lower sub-ohm resistance, we suggest a 0.06-0.12 ohm base on Temco Ni-200. You can get the perfect experinces when you build the atomizer with the resistance 0.06ohm. However, if using the resistance above 0.3 ohm or Khanthal atomizers there will be variance and some unexpected behaviors may be observed in Joule mode.

If YiHi can't fix "unexpected behaviors" of their own chip well within their stated SX350J specs I'm highly disinclined to waste any more time trying to make heads or tails of what I've experienced. I'll stick to building for the SX Mini in the teensy oHm range where it seems to be producing the temperature/taste consistency I prefer and leave it at that.

I'm not completely following you. Perhaps if your having problems you should take them over to the Sxmni M CLass (Temp Control) thread and get assistance. Lot of folks over there to help. If you are exhibiting a technical problem it would be great value to post that with any supporting information. Perceiving something doesn't always work out to be what it actually is.

Also the "unexpected behaviors" I believe is stated due to people using Kanthal, Nichrome etc.. on their atomizer in Joule mode. I'm pretty sure they have no way at all to fix that. But I do think what you posted to be incorrect on the Spec sheet for resistance. The online manual state .05-.3Ω in Joule mode which I think is correct and so they do have some inconsistency in the documentation.

 

[Vooper]

I'm not completely following you. Perhaps if your having problems you should take them over to the Sxmni M CLass (Temp Control) thread and get assistance. Lot of folks over there to help. If you are exhibiting a technical problem it would be great value to post that with any supporting information. Perceiving something doesn't always work out to be what it actually is.

Also the "unexpected behaviors" I believe is stated due to people using Kanthal, Nichrome etc.. on their atomizer in Joule mode. I'm pretty sure they have no way at all to fix that. But I do think what you posted to be incorrect on the Spec sheet for resistance. The online manual state .05-.3Ω in Joule mode which I think is correct and so they do have some inconsistency in the documentation.

I don't even want to see the atomizer you'd need to fit a 1ohm NI200 build.

 

[dr g]

The temperature display seems to be reflective of the temperature I'm experiencing with with builds very close to the recommended .06. It hits the set temperature of 380° nearly immediately and the most it's been off was +24° and -9° but only very briefly. However, at .2+ oHms the screen temperature doesn't seem to waver much more than ±6–7° even when the temperature I'm perceiving does seem quite a bit more off for extended periods both on the high and low end than the +24/-9° I've seen with the lower oHm builds.

The SX350J specs show a range of .12—1.0 oHms for Joules mode. However, when explaining the hum that the chip produces Yihi made this statement:

Because the technology of M Class is the newest, and supports lower sub-ohm resistance, we suggest a 0.06-0.12 ohm base on Temco Ni-200. You can get the perfect experinces when you build the atomizer with the resistance 0.06ohm. However, if using the resistance above 0.3 ohm or Khanthal atomizers there will be variance and some unexpected behaviors may be observed in Joule mode.

If YiHi can't fix "unexpected behaviors" of their own chip well within their stated SX350J specs I'm highly disinclined to waste any more time trying to make heads or tails of what I've experienced. I'll stick to building for the SX Mini in the teensy oHm range where it seems to be producing the temperature/taste consistency I prefer and leave it at that.

380 is almost certainly off as well. But that's kind of the lot of the SXJ. As I wrote in my mini breakdown, it's probably going to be best received by people who are not that familiar with how properly engineered TP works. It seems best to make it "just work" and not necessarily try to make sense of what it is doing, and not compare its behavior to other TPs.

 

[dam718]

380 is almost certainly off as well. But that's kind of the lot of the SXJ. As I wrote in my mini breakdown, it's probably going to be best received by people who are not that familiar with how properly engineered TP works. It seems best to make it "just work" and not necessarily try to make sense of what it is doing, and not compare its behavior to other TPs.

Oh come on, things were going so well... LoL Surely you aren't suggesting that people who are familiar with a "Properly Engineered" TP device will like that properly engineered device more than they like their SX350J based device? Since there is really only one other player in the game, my observation has been that people who have used both prefer the SX350J. Who are we to say which one was properly engineered? The one that hit the market first?

 

[Rossum]

Who are we to say which one was properly engineered? The one that hit the market first?

The one that actually limits temperatures at a value resembling the setpoint?

 

[tchavei]

I see another rule #11 infringement coming...

 

[Vooper]

The one that actually limits temperatures at a value resembling the setpoint?

Which version though, the one everyone already bought or one of the 3 different buggy revisions of non upgradeable chips released since?

 

[retird]

Thought this was an SX thread...the sx has had no revisions and has upgradable chip... come on guys... lets get off the SX vs. ??? making folks uncomfortable in this forum...my thoughts are if ya want a SX vs. ?? discussion just start a thread...

tiny rant completed...

 

[IanDVaypes]

Sometimes I wonder why someone will enter a thread that has something they dislike. Kinda like how I used to wonder why atheists went to my church. Then I realized it was for the free food.

There's no free food here so may I ask you why? Mr. Dr. G?

 

[IanDVaypes]

https://www.e-cigarette-forum/threads/dna40-vs-sx350j.669162/

You're welcome

Now back to your regular scheduled program.

 

[dam718]

Thought this was an SX thread...the sx has had no revisions and has upgradable chip... come on guys... lets get off the SX vs. ??? making folks uncomfortable in this forum...my thoughts are if ya want a SX vs. ?? discussion just start a thread...

tiny rant completed...

Buy a ProVari??? LoL

Remember a couple years ago when every other thread was XXX vs. ProVari

I do believe that phenomena is about to resurrect itself as these temp control devices gain momentum in the industry... You know, provided the government doesn't cut our legs out from under us...

As long as the discussions stay relatively calm, and all we're doing is some friendly jabs at devices as opposed to making it personal, I'd love a lively debate regarding the merits and downfalls of the two top contenders in the TC race.

 

[Marc411]

I use both TL devices and the SX is preferred since it is overall just more consistent and has considerably more options to suit my vaping preferences. The presets and power levels are great options.

I use titanium so I am not using it as engineered but I didn't need to be a rocket scientist to adjust to my preference in wire. I like that I can build, attach an atomizer and get a consistent vape. I'm also finding that I can use every atty I have without failures or the ohm's jumping.

There are so many variables when it comes to the atomizer and wire a person uses that you just need to adjust to your style to the device. The DNA flask is nice but the Mini is just more consistent and I finally found the Black body in stock and it's on the way.