Vapor Flask V3 DNA40 Clone thread

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Quantum Mech

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I just don't know, I had two screws tight and two screws loose and the two that were tight couldn't provide ground enough to keep the display lit.

Ok thanks

I am thinking it would be best if I tack an additional earth from the 510 to board connection or battery sled to board

Did you notice where the board is picking up its earth
 

dwcraig1

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Ok thanks

I am thinking it would be best if I tack an additional earth from the 510 to board connection or battery sled to board

Did you notice where the board is picking up its earth
No i didn't see but the Ryan boards are using the one for output to the 510's ground, I believe they did the same.
But don't know.
EDIT
I opened it and took a look, they have it to Batt neg
I imagine to board is the same layout as an Evolv DNA40
 
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Quantum Mech

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No i didn't see but the Ryan boards are using the one for output to the 510's ground, I believe they did the same.
But don't know.

Am just wondering where the board then picks its earth up from

They are not screwed to the casing so must be an earth link wire to casing or batt sled

Think the SX Mini way with separate supply would be best

Poor picture but you can just make out the earth going direct to the board as well as the 510

sx%20mini_zpsuqtxenuo.jpg
 

dwcraig1

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It shares the ground with the 510
On the Evolv dna 40 boards the batt minus and 510 ground are connected internally on the board, these appear to be the same.
Here's part of the problem perhaps getting a ground with the screws. Their pretty short and the holes that they go into on the box are beveled so no much threads biting.
They can be 10 mm long, I measured through the plate to thebottom of the holes and it's 12 mm.
11390361_1015637931793764_7899883666459403504_n.jpg

11407170_1015637965127094_652125264271010297_n.jpg

In the first picture I have a screw in the plate to show just how deep they go, bevel is at least 1 mm so not much thread contact
 
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Quantum Mech

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EDIT
I opened it and took a look, they have it to Batt neg
I imagine to board is the same layout as an Evolv DNA40

Oh

That throws that theory out of the window then

So we have board & 510 properly earthed

But cleaning your top plate & casing cured your fault of low ohms reading !

@HolmanGT any idea's mate
 

dwcraig1

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Oh

That throws that theory out of the window then

So we have board & 510 properly earthed

But cleaning your top plate & casing cured your fault of low ohms reading !

@HolmanGT any idea's mate
Well the output ground pad should be available, same thing but it's on the lower end of the board.
And no, still reads ohm faulty but works good
 

Quantum Mech

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It shares the ground with the 510
On the Evolv DNA 40 boards the batt minus and 510 ground are connected internally on the board, these appear to be the same.
Here's part of the problem perhaps getting a ground with the screws. Their pretty short and the holes that they go into on the box are beveled so no much threads biting.
They can be 10 mm long, I measured through the plate to thebottom of the holes and it's 12 mm.
11390361_1015637931793764_7899883666459403504_n.jpg

11407170_1015637965127094_652125264271010297_n.jpg

In the first picture I have a screw in the plate to show just how deep they go, bevel is at least 1 mm so not much thread contact

With separate earths from battery sled to both 510 & board

I am starting to think the cleaning of top plate & casing is coincidental & issue could be with the 510 insulation between live/earth

If not the board itself
 
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Quantum Mech

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Well the output ground pad should be available, same thing but it's on the lower end of the board.
And no, still reads ohm faulty but works good

Yeah I am confusing myself here looking at more than one fault/issue at once

the low ohms you see now is board related I do believe

the very low ohms incorrect reading you had when it would not fire at 60w at not sure

suspect that was 510 related
 

dwcraig1

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With separate earths from battery sled to both 510 & board

I am starting to think the cleaning of top plate & casing is coincidental & issue could be with the 510 insulation between live/earth

If not the board itself
It look just like a Fatdaddy v3 shorty
With separate earths from battery sled to both 510 & board

I am starting to think the cleaning of top plate & casing is coincidental & issue could be with the 510 insulation between live/earth

If not the board itself
Only one, the ground wire is the one that goes to the 510
 
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dwcraig1

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Yeah I am confusing myself here looking at more than one fault/issue at once

the low ohms you see now is board related I do believe

the very low ohms incorrect reading you had when it would not fire at 60w at not sure

suspect that was 510 related
I got low watts, like 10 watts when set to 60 watts.
 

Quantum Mech

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everything has changed since we now kni
EDIT
I opened it and took a look, they have it to Batt neg

My mistake, thought you meant here that the board was supplied its earth via the battery negative terminal

Only one, the ground wire is the one that goes to the 510
 

TheBloke

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The inherent low readings on working devices is an inaccuracy that may be a fault in design or purposely so SXK can claim lower ohm firing than their board can take to keep pace with other boards

This thought has bothered me too. It could be a coincidence, or it could be too much of a coincidence that they quoted minimum specs of 0.06 which added to the 0.04 low resistance at this level gives the usual 0.10.
 

Quantum Mech

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What's really strange is it reads 0.07 ohms un-fired (it's really 0.12 ohms) but the vape just like the board is seeing it correctly. A resistance of that much different would be very noticeable.

that is definitely strange

if it can control correctly why cant it display correctly
 
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Tpat591

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the top plate mating surface where the 510 plate sits looks clean or is the white/silvery looking part in the picture not clean metal
as long as the screw threads are clean in the case and top plate where the screw heads fit there should be a good path for the earth
although with the battery sled in the case I cant see why its not earthed as well



You want to volunteer for something please do

With the board not having a separate earth from the battery sled

A poor earth circuit from the top plate to case is no different to a loose coil leg & will show high resistance

If the board when under load does not receive full power due to poor earth or live it would not work correctly & anyone with pcb experience would know to ignore the board until good connections have been confirmed

The inherent low readings on working devices is an inaccuracy that may be a fault in design or purposely so SXK can claim lower ohm firing than their board can take to keep pace with other boards

Firing a low ohm circuit increases the work a board has to do & creates heat, the board may not be up to it

Speculation is fine but that is all anyone is doing that does not have the device in the hand with the correct tools & knowledge to fault find

Maybe you could enlighten us with how you would fault find this the correct way ?
I may have misunderstood your previous post. I thought you said that you had a batch of these coming and you were going to open them up and repair the grounds and possibly install new chassis grounds to board before you distributed them.

I asked you to take a few pics of the repair process you employed when you did so to help others and post them with your findings as with a large batch of units you will probably be the best person to find the most efficient repeatable process and are obviously skilled in what you are doing.

Should I have tried to volunteer you in that manner without asking politely - no. For that I am sorry. If you choose not to do so fair enough.

We all agree the OP has probably got a poor connection issue and many of us would choose to diagnose it ourselves with an ohm meter on each connection starting with the 510 to top plate right on through looking for any instabilities in each each connection but the best advice I would give him is to return his warranted unit to Fasttech for manufacturers replacement based on his reported skill level.

I have 2 Waideas & a Kangxin not an SXK so I have only been speculating.
 
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