Evolve DNA 40 clone temp control - first look :)

[robby]

I`ve just taken the top off my Waidea DNA40 clone, that earth is not soldered and it isn`t clamped which is pretty disturbing. It`s just wrapped around the 510 connector then twisted tight and soldered, but only at the twist. The loop can move around the 510 with ease  It is not however FREE to move.

[tpat591]

Certainly explains the early feedback reports of connectivity issues that were posted on 3fvape & early reports of units dying. If that hand tighted cener pin cap comes loose, you lose the ground/earth & the whole unit shuts down. Good news is its an easy fix. 

Croak said it is exactly the way they did it on the early original Vapor Flask 2.1 & Waidea must have gotten one of these & duplicated it exactly.

[Croak]

That silver portion underneath, where the positive pin is, is threaded, and in theory should act as a nut to secure the ground. In practice, not so much. I've had some "weak battery" episodes with mine, a common result when grounding isn't solid.

There's also a fair amount of anodizing in the battery threads, and I don't see any indication that they took the additional step that Kangxin did and ran a ground direct to chassis as well. Ground problems will ensue.

Good news is, that 510 is an easy fix, you could add a dollop of solder to it as-is, or mount a ring terminal above the brass hex nut and solder to that, or just simply solder to the brass hex nut.

[Croak]

Apr 18, 2015 10:35:25 GMT tpat591 said:

Certainly explains the early feedback reports of connectivity issues that were posted on 3fvape & reports of units dying. If that hand tighted cener pin cap comes loose, you lose the ground/earth & the whole unit shuts down. Good news is its an easy fix. 

Croak said it is exactly the way they did it on the early original Vapor Flask 2.1 & Waidea must have gotten one of these & duplicated it exactly.

No, it's not exactly how VF did it on the original 2.1, it's just that Waidea copied the original's ground scheme in general, which wasn't up to Evolv spec for a DNA40 (though just fine for a DNA30).  Same basic problem the early runs of the HCigar HB40 had.  

[robby]

If that SS cap is threaded, then mine is tightened up all the way, it cant actually tighten up enough to properly clamp the wire. A washer or two should sort it though between the cap and the wire, but why the feck didn`t Waidea do it, pretty basic stuff really.

[tpat591]

Apr 18, 2015 10:41:49 GMT Croak said:

Apr 18, 2015 10:35:25 GMT tpat591 said:

Certainly explains the early feedback reports of connectivity issues that were posted on 3fvape & reports of units dying. If that hand tighted cener pin cap comes loose, you lose the ground/earth & the whole unit shuts down. Good news is its an easy fix. 

Croak said it is exactly the way they did it on the early original Vapor Flask 2.1 & Waidea must have gotten one of these & duplicated it exactly.

No, it's not exactly how VF did it on the original 2.1, it's just that Waidea copied the original's ground scheme in general, which wasn't up to Evolv spec for a DNA40 (though just fine for a DNA30).  Same basic problem the early runs of the HCigar HB40 had.  

Sorry, misunderstood what you said before on ECF & I never had an original.

[robby]

One like that should do it
Shouldn`t have to unsolder anything

[Croak]

Just have to be careful that the washer doesn't prevent the bottom barrel from screwing in fully, else you'll have a deeper 510 pin, and it's already borderline for some atomizers, as you've found.

[robby]

I think it should work okay, plenty of squeeze down on that wire, just have to make it a thinish washer

[VapingBad]

Apr 18, 2015 10:09:43 GMT robby said:

But the chances of them all using the same chip to write their firmware on is pretty high, especially if they are cheap. When it comes down to it, there is only one way to implement TC and that`s with nickel, we`ve all seen SMOK`s FAIL So tempted to take this new invader mini apart, but I`ll resist . Personally, I dont have a problem if they all use the same basic firmware and tweak it, that`s were the practicality of a mod comes from. The important thing is that it works, and it works on a par with Evolve

The firmware could easily be copied from a generic controller chip , but the rest of the board would have to be the same to use it without modification.  There will be loads of ways of implementing TC, but the most important technology is to have real time wattage control to bolt it on to.  IMO that gave Evolv a head start and held YiHi back.  If you get the coils pulsing at 600 F you can see the temp management can be quite slow on the Evolv, they glow every half to three quarters of a seconds between adjustments, but the power management works at a much higher speed and is largely responsible for the vape quality & consistency.

[tpat591]

is there any way to give that fixed center pin a tap or two to raise it high enough to contact your kf4?

[robby]

Apr 18, 2015 11:15:06 GMT tpat591 said:

is there any way to give that fixed center pin a tap or two to raise it high enough to contact your kf4?

I would have to strip it and see how it`s made. There is certainly room on the pin, the soldering is a bit untidy, too much there. If I do that though, everything else is gonna sit high

[tpat591]

Willie had the right idea in sticking a proper floating pin from a FDV into it. Waidea said when they tried a floating pin they weren't happy with the results but you would probably get a better connection with the floating pin & a proper ground.

[robby]

Apr 18, 2015 11:35:26 GMT tpat591 said:

Willie had the right idea in sticking a proper floating pin from a FDV into it. Waidea said when they tried a floating pin they weren't happy with the results but you would probably get a better connection with the floating pin & a proper ground.

I must say, I like the Kangxin approach with the screw adjuster, always a solid connection

[tpat591]

I already PMed Nicole to tell Andy at Waidea they need to correct this immediately. Hopefully they will do so quickly in future manufacturing runs.