Vivi Nova Rebuild tutorial

[thatick]

i did a 5 "oval" wrap around the 2 toothpicks using 30g kanthal. 8 strands of Aunt Lydia's #10, then a 9th strand that i put through coil and wrapped around legs. ohmed around 1.87 modified air holes and center post air hole and so far so good. Not quite on par with my ss mesh build using 5 wraps of 32g (1.3 ohm) but its gotta break in for a more fair comparison

 

[Errol]

Errol

Very interesting on the Vision Stone. I am a newbie & had not heard of them. Seems like a nice huge cup. That sucker might even be big enough for the above stacked skewer monster coil.

It's a little larger than the Vivi Nova's 4.75mm I.D. cup at 4.92mm. Unfortunately it's not rebuildable, not with my abilities anyway but I've a couple for nearly a year and they still work great.

Errol

 

[MikeE3]

MikeE3
All browsers should natively support APNG!, it does a vaper good.

Safari noted as an APNG foot dragger

The question I have is:
Did you need to heat the wire on the double stacked toothpicks or burn them away, before removal?
The reason I ask: I experienced this(spring back effect) upon removal.

You be a graphic wizard, sir. I understand how to make a gif, but how you took my avatar and added the expanding smoke cloud is beyond me! Nice work.

I haven't used 28g, but w/ 30g I've run it thru a lighter flame before winding the coil around 2 toothpicks and that seems to help it retain its shape without springing back. Even with that, I had to 'coax' the legs to stay where I wanted them.

 

[BJ43]

The thread wrapped oval coil now has over a week of use and still no grommet burn.

 

[th3tick]

I've started using a single chunk of #1/0 candle wick and am experiencing burning. Any suggestions on how to improve the wicking so I get more fluid flow to prevent this?

I would guess more wick, which might be hard to fit in the head, or separating the threads of the wick more, but would appreciate any advice.

 

[mrelwood]

I've started using a single chunk of #1/0 candle wick and am experiencing burning. Any suggestions on how to improve the wicking so I get more fluid flow to prevent this?

I would guess more wick, which might be hard to fit in the head, or separating the threads of the wick more, but would appreciate any advice.

There are two main factors to wicking. The wick must have a non-supressed route to the coil, and replacement air must be able to get to the tank easily. Inspecting the ato head slots and the wick itself with those in mind might help you find the reason for burning. Don't know how well the candle wick wicks, so that is one place of concern.

 

[Errol]

You be a graphic wizard, sir. I understand how to make a gif, but how you took my avatar and added the expanding smoke cloud is beyond me! Nice work.

Have to agree, MISTer E is a Graphics Wizard in all respects, particularly his tutorial slide presentations. He should have my Avatar.

Errol

 

[xMackx]

The thread wrapped oval coil now has over a week of use and still no grommet burn.

So the cotton wrap on the legs just under the coil absorb heat so your grommet doesn't burn? If that is the case I will have to try that idea.

 

[th3tick]

Large 28g oval coil for the vivi nova. Lydia's #10

What are the sticks in use here? I think I read toothpicks, but I've not seen ones so nice and clean before, so I thought I'd make sure.

 

[MISTer E]

MikeE3

You be a graphic wizard, sir. I understand how to make a gif, but how you took my avatar and added the expanding smoke cloud is beyond me! Nice work.

I haven't used 28g, but w/ 30g I've run it thru a lighter flame before winding the coil around 2 toothpicks and that seems to help it retain its shape without springing back. Even with that, I had to 'coax' the legs to stay where I wanted them.

Errol

Have to agree, MISTer E is a Graphics Wizard in all respects, particularly his tutorial slide presentations. He should have my Avatar.

I do have lizard roots, traced them back to before ice age blizzards. Many have known me as Puff. I once lived in a cave by the sea. I also possess many wands of many sorts. When using GIMP to communicate images, my favorite tool is the magic wand.

Nope not mE

th3tick

What are the sticks in use here? I think I read toothpicks, but I've not seen ones so nice and clean before, so I thought I'd make sure.

I B wit U on dat

Here is a comparison of 2 squared regular human sized toothpicks & 2 of the (cough) likley? BJ43 monster meat skewer [3mm x 8 inch] ones, I thought/think they may be?

 

[BJ43]

What are the sticks in use here? I think I read toothpicks, but I've not seen ones so nice and clean before, so I thought I'd make sure.

They are round wood toothpicks. Yes they are irregular, I just try to pick two that are equal thickness, non of this has to be exact.

 

[th3tick]

They are round wood toothpicks. Yes they are irregular, I just try to pick two that are equal thickness, non of this has to be exact.

So, I tried this last night, and found some issues. I had de-tempered some 32g wire, and went with five wraps. After removing the picks, the thing sproinged a big, but I was able to manipulate it back into a reasonable shape, fed some thread through it, and put it in the head. The main problem I found was trying to get this coil to give a good or consistent resistance. When I first tested it, I was getting around 0.9 ohms, but manipulated it some more, and found that depending on how it was positioned, got anywhere from 0.9 to 2.8 ohms.

I assume that there are some miscellaneous shorts, either on the positive side, or coils touching. In the end, I just couldn't get it to hold a reasonable position consistently enough to make this usable.

Do you have any hints as to how to stabilize this in some way so that it doesn't touch other parts? When I'd simply wrapped some wick previously, the wick itself stabilized the shape and position, but am not finding a good way to do it when coiling, then threading.

 

[BJ43]

So, I tried this last night, and found some issues. I had de-tempered some 32g wire, and went with five wraps. After removing the picks, the thing sproinged a big, but I was able to manipulate it back into a reasonable shape, fed some thread through it, and put it in the head. The main problem I found was trying to get this coil to give a good or consistent resistance. When I first tested it, I was getting around 0.9 ohms, but manipulated it some more, and found that depending on how it was positioned, got anywhere from 0.9 to 2.8 ohms.


I assume that there are some miscellaneous shorts, either on the positive side, or coils touching. In the end, I just couldn't get it to hold a reasonable position consistently enough to make this usable.

Do you have any hints as to how to stabilize this in some way so that it doesn't touch other parts? When I'd simply wrapped some wick previously, the wick itself stabilized the shape and position, but am not finding a good way to do it when coiling, then threading.

32g is kind of flimsy to do this, the reason for the oval wick was to get more wire and over 1.2 ohms of 28g in the vivi nova. In the pic you will see I put the first thread thru the coil, then the ends around each leg 4 times then back thru the coil. This keeps the legs wet and cool and also helps isolate the pos from the metal side.

 

[xMackx]

I'm using 100% cotton cheese cloth and A-1 33awg Kanthal. I noticed to get 1.8 ohms with 4 wraps of the coil they have to be really tight small coils and tug the legs down tight. If I wanted to keep a coil at 1.8 but want the coil/wick thicker could I get away with 2 wraps? I'm getting great vapor and it wicks really well, just getting that singed cotton taste still.

I think I'm gong to try what BJ43 has shown today.

 

[MikeE3]

I don't think you want 'tight' coils around the wick. It could pinch off the juice flow in the wick. And going to 2 coils just doesn't make sense to me. You're really reducing the surface area of the coil to vaporize the juice. You'd be better off going to 32g before trying 2 wraps w/ 33g.

 

[xMackx]

I don't think you want 'tight' coils around the wick. It could pinch off the juice flow in the wick. And going to 2 coils just doesn't make sense to me. You're really reducing the surface area of the coil to vaporize the juice. You'd be better off going to 32g before trying 2 wraps w/ 33g.

Is there much difference from 33 and 32 gauge kanthal?

 

[MikeE3]

Is there much difference from 33 and 32 gauge kanthal?

Mack,

32g Kanthal is 1.15 Ω/inch, and 33g is 1.45Ω/inch. And you said "If I wanted to keep a coil at 1.8 but want the coil/wick thicker...", using a lower gauge (thicker wire/lower resistance) wire you have the potential to make a 'thicker' coil/wick and keep the Ω down.

I don't have any 33g, so don't now how significant changing from 33g to 32g will be for you. But I surely get a measurable difference between using 30g, 32g & 34g for coils.

 

[MISTer E]

I am so glad "on behalf of the power grids across the globe" that BJ43 was using toothpicks & not my skewers. I just tested my "way too big for the vivi head" monster coil that I had earlier posted & that thing would have needed some serious energy to power it.

3.3 volts to get 5 watts on that gargantuan would not suffice(6.7v gives 20 watts). This must be along the lines of what the new DNA 20 chips are designed to power.

Thick gauge @ standard ohm'age? any links any1?

I wish those walls were ceramic.


Errol,

I ordered some innards for vivi stone v3 @ discountvapers & also found out V3 has stainless top & bottom(v2 is aluminum, very nice too). Thanks for turning me on to it



xMackx,

I use 32 & 33 kanthal (A1) & there is a noticeable difference, that I enjoy. I also have a tiny bit of experience with the thick 28 gauge stuff that is becoming a trend. That said I find my 32 to be the most usable of them. 28(a1) can be too thick & cold some times for the ohms I desire & 33 too thin & hot. 32 is the most versatile to me & all aid the ways I experiment, as I rig together an atty set up.

That may change as I add new gauges, but for now 32 treats my vapor

more often the most kind & true.

 

[xMackx]

Are there any tricks or mods other than using non-resistance wire so the rubber grommet doesn't burn?

I took my proxxon rotary tool and bored the wick slot a little wider then bored a hole shape at the bottom, wrapped a 1.8 ohm 5 wrap coil 33g kanthal and no more burnt cotton flavor. Cheese cloth expands so much it needed bigger wick slots. I was going to take pics while I was doing it but forgot (next wick/coil).

 

[gdeal]

xMaclex

Other than using non-resistant wire you can fold over the ends of the resistant wire like this:


(not sure of poster)

or for a close up of a double wick coill with \eautifully twisted legs....



This one is posted by Sicarius...Luv that photo and design....

Post those pics of your cheesecloth setup!