It only 'hertz' when I think.
Or as Descartes said: I hertz therefore I am.
Hertzo ergo sum?
SXmini M Class (TEMP CONTROL)
- Thread starter whitewidows
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Hertzo ergo sum?
A few of us ordered our SX Mini's when they first came out and it took a very long to receive them due to the shipping. I would ask if they have a DHL option unless you like waiting three weeks for the mail.
http://www.egovap.com/mods-pipeline-pro-dani-telegonos-dicodes-bec-pro-epipe-sigelei-itaste/1209-sx-mini-m-class-yihi.html
Dam718,
Be glad you ordered from Eciggty. I sent them an email asking then if they will get them in stock and can they email me. They replied yes, and said we will try to notify you but we are really busy. I ended up pre-ordering from another site and am now w a i t i n g and watching everyone else get theirs. No updates from the site I ordered from.....
Now I wished I ordered from Eciggty as being here in Hawaii my stuff takes 2 days. To bad they just don't let us will-call stuff as I could just drive there.
Be glad you ordered from Eciggty. I sent them an email asking then if they will get them in stock and can they email me. They replied yes, and said we will try to notify you but we are really busy. I ended up pre-ordering from another site and am now w a i t i n g and watching everyone else get theirs. No updates from the site I ordered from.....
Now I wished I ordered from Eciggty as being here in Hawaii my stuff takes 2 days. To bad they just don't let us will-call stuff as I could just drive there.
Yeah, I placed my order this morning around 9'ish... I tried to get them in the little chat window on the site at 11 to see if they could just set it aside in the warehouse and I just come get it... But, at 11:15 it was already posted for shipping and picked up by USPS a bit after 1PM... They were too quick for me to catch them... Heh
Hopefully it will be here tomorrow. It's sitting in the Honolulu post office right now, should make it's way out here to Ewa Beach overnight. We'll see... Usually when I send mail on island it gets there the next day.
To be honest, I didn't even know Eciggity had them until I looked at their website this morning. I was going to order it from Varitube... But when I saw Eciggity had them I went ahead and pulled the trigger. I was a little disappointed though... The usual 10 percent off discount code I've been using with them doesn't work with the SX Mini... Stupid YiHi, who do they think they are? Apple? LoL
Edit: Just checked the tracking info... Just left the Honolulu facility in route to Ewa Beach at 10:46 - Looking good for arrival tomorrow. Gotta love it when the vape gods bless you with speedy postal workers.
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Yeah don't worry once it hits the Airport or Honolulu Post Office it goes out to the Waipahu Post Office by night and is out for delivery by morning, you will get it Wednesday for sure.
The site I ordered from stated estimated ship date 4/7 and estimated release (on site) 4/9......4/7 has come and gone - and like I said NO updates, nothing, just crickets chirping and silence. I know who NOT to order from if the next big thing comes out.
Let me know how you like it. lol
The site I ordered from stated estimated ship date 4/7 and estimated release (on site) 4/9......4/7 has come and gone - and like I said NO updates, nothing, just crickets chirping and silence. I know who NOT to order from if the next big thing comes out.
Let me know how you like it. lol
Thanks for the link. Pretty cheap too compared to other sites.
Wish I had the cash right now for one.
Regards
Tony
So something I was curious about was does the resistance limitation of .08 Ohms still apply when using TC with the SX350J board...
Looking at the YiHi FAQ I found this snippet:
Q:What is the lowest resistance of the SXmini M Class device in order to use temperature control ?
A: It is 0.05ohm. Our spec.of SX350J chip wrote 0.08ohm.
So, looks like the minimum resistance when in TC is actually .05 Ohms, not .08.
That makes me feel a bit better... I thought I was gonna have to use some pretty huge coils on my dual coil RDA builds, but maybe not?
Not that it matters... The SX Mini will beat the Ni200 wire here by a few days.
Looking at the YiHi FAQ I found this snippet:
Q:What is the lowest resistance of the SXmini M Class device in order to use temperature control ?
A: It is 0.05ohm. Our spec.of SX350J chip wrote 0.08ohm.
So, looks like the minimum resistance when in TC is actually .05 Ohms, not .08.
That makes me feel a bit better... I thought I was gonna have to use some pretty huge coils on my dual coil RDA builds, but maybe not?
Not that it matters... The SX Mini will beat the Ni200 wire here by a few days.
Mine should turn up at lunchtime today. Ordered on monday, £135 with free tracked delivery. Pretty cool deal!
Will do... Heck I may even bust out the old cam and do a review of this one... Been a couple of years since I've put up a review/tutorial on anything, and this is so fresh off the boat, there aren't a lot of videos out for it just yet.
I'm almost 99% sure someone mentioned using titanium with his sx mini... Just wait a bit. Someone should chime in soon.
Regards
Tony
Sent from my keyboard through my phone or something like that.
I will try later on but there is absolutely no reason why it wouldn't work just fine!
Trust me, you don't want to run coils with resistance that low. Too small a margin of error for resistance shifts that occur naturally due to aging coils, external temps, etc. Even trying to stay at the low end of Evolv's spec (0.1) is problematic, running at half that will create a lot of headaches and heartburn (and higher amp loads) for no good reason other than build deck space.
I have no reason to believe Yihi has found some magic solution to those same variables, it's not a question of algorithms and processing power in any case, it's just straight physics at work.
So, learn to embrace thinner wire when working with Ni200, rather than sticking with the heavier stuff you're probably used to using in Kanthal builds. 28ga is as heavy as I would go these days, but I get much better, reliable results with 30 or 32ga, and loads above 0.2 ohms.
Abso! I guess its also the spaced-coil thing that is an issue. Just takes up a lot of deck space. Dual coils are also going to be a problem as it is almost impossible to get them matched well enough in my experience. At least I can't get it to work well or even at all. I have been messing around with work hardened Ni wire. 32g is workable and much less soft but my god is it springy...a whole new coiling experience. Duals with 28/30/32g Ti might work though!
I was planning to use 28AWG Ni200, but looking at Steam Engine, for a dual coil setup at .2 Ohms, I would need 29 wraps per coil with a 3mm I.D. LOL!! That's ridiculous...
Most of the builds I have seen people use with the DNA 40 devices fall within the .12 - .18 range, and most TBH have been single coil builds. 32AWG looks to be the best bet only needing 10 wraps per coil, with 30 at 14/15 wraps. That's if I stay in the .16 area...
YiHi is recommending a dual coil resistance of .065 Ohms in the video they did of the SX Mini M Class, and I'm not so sure I want to ride the edge of the blade like that.
Just seemed a bit more realistic than trying to keep at roughly .2 ohms with a dual coil build. For now I'll grab a spool of 28AWG and 30AWG and see how things go. The 32, with as weak as Ni200 is, I feel would break way too easy.
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The technique in the video below really helps a lot when using thin gauge Ni200, though you won't be winning style points on Instagram with your sexy coil pics.
I'm still trying to brainstorm methods that this device may work "differently" ... you mention that it's not a question of algorithms and processing power, but how about this theory:
Other TC devices measure the average temperature of the entire coil based on the resistance. I.e.: "If our current temperature is at or very close to our TC setting, begin lowering wattage delivery"
Perhaps the SX Mini is focusing more on the current delta, rather than adjusting/throttling back based on the current calculated temperature? Say the processor is powerful enough to do this at an extremely high rate of speed, maybe faster than other TC chips. If the delta between .01 and .02 seconds at any point during firing is above a certain threshold, lower the watts/sec output slightly to control the delta:
The algorithm would be something like: If at any point during the fire, the resistance delta for a .05 (or .xxx) second interval was 200F (or above a programmed delta threshold), lower watts per second output for a fraction of a second to control because our delta of 200F is too high.
If it does this at a super high rate of speed, it might(?) be pretty effective compared to just reading current temperature and saying ooh, too hot, lower wattage.
Just a thought I had immediately after waking up while staring at the ceiling and thinking about getting up to get in the shower.
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That sounds reasonable and, I'm sure, feasible for a half decent cpu!
I guess the real problem here is one that is common to all feedback/servo regulation systems in that it is only possible to maintain a correct value (temp/resistance in our case) on average. By definition, it is only possible to restore to the target value after the delta has been detected. In some sense, the value is always wrong one way or the other but, on average, it is correct. A lot of old vinyl record turntables used to work in just this way. It is used in many other scenarios...Just a thought for the day lol!
I guess the real problem here is one that is common to all feedback/servo regulation systems in that it is only possible to maintain a correct value (temp/resistance in our case) on average. By definition, it is only possible to restore to the target value after the delta has been detected. In some sense, the value is always wrong one way or the other but, on average, it is correct. A lot of old vinyl record turntables used to work in just this way. It is used in many other scenarios...Just a thought for the day lol!
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