I call it ADP Mod.. Auto Drip Mod!

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DC2

Tootie Puffer
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Jun 21, 2009
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I used a drinking straw cut to length instead of a spring or the cut piece from the rubber cap. Displaces less liquid than the rubber piece and no metal to corrode.

I also used a piece of a greenie scrubber for the plug. Press the cart mouth on the greenie and it leaves an impression to cut around. Just make it slightly larger, so it seals the opening. The liquid chamber itself never gets hot, so no worries about the straw melting.

Strawwithplug.jpg
I'm really liking this idea, not that that the spring is a bad idea at all.
But what exactly are these "greenie" things?


My main concerns with all the materials is what MIGHT leach out into the juice.
--stainless steel pipe screens
--greenie things
--plastic straw
--blue foam
--fluval

I guess I trust the polyfill, but don't want to go back to that.
Tweezing fibers off of my atomizer bridge was a pain.
:)
 

jerrydon10

Unregistered Supplier
ECF Veteran
Kristin's idea is really what we are doing. The cart chamber is the bottle and the polyfill plug is the wicking "stopper."

Now that I've discovered this mod, I have gone nuts and modded my 510s as well.

I also think the springs I used are stainless steel. That's food grade, so I ain't worried.
 

dubnluvn

Senior Member
ECF Veteran
Oct 14, 2009
255
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San Diego, Ca
This mod is definitely the closest thing to a perfect cart solution as of yet. The ideal solution is a very thin membrane that spans the opening at exactly where the atty wick is fully positioned in the cart. That membrane should be able to do two things. 1) support the weight of the liquid and 2) be absorbent enough to soak up juice as needed.

With just filler, whether it be the stock poly, fluval, or wool is that they are too absorbent. While they support the weight of the juice they don't allow it to flow efficiently. The straw mod, may allow for a little extra flow and possible capacity increase due to evacuating air from back of the cart (same process in reverse aids in flow) they are still hampered by the super absorbent filler.

With this we have an absorbant membrane that (if dense enough) can support the weight of the juice. Unlike other mods, the addition of the spring holds the filler in place near the atty leaving the rest of the cavity empty. Now the juice has a predictable direction of flow, it will always gravitate towards the small amount of filler near the atty, since that is the only absorbent material present. Also, due to the reduced amount of filler necessary there is less 'waste' or un-vapable (if thats a word) juice, which we all experience when any other filler based mod is used.

Different carts will need different densities of absorbent material due to the size of the opening. For example, a reservoir with a narrow opening will require less material than a res with a wider opening (think about when you put your finger over a straw in a glass of water and the liquid stays in there), given liquid of the same density for each. Likewise, a more dense liquid will require less material than a less dense liquid.

The less the filler or absorbent material used that is able to hold the juice while still preventing leakage will lead to the best results. This is the closest to that model we have seen thus far.
 

kristin

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Aug 16, 2009
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I'm really liking this idea, not that that the spring is a bad idea at all.
But what exactly are these "greenie" things?


My main concerns with all the materials is what MIGHT leach out into the juice.
--stainless steel pipe screens
--greenie things
--plastic straw
--blue foam
--fluval

I guess I trust the polyfill, but don't want to go back to that.
Tweezing fibers off of my atomizer bridge was a pain.
:)
The greenie is made of nylon fiber. I don't think the straw would get hot enough to leech anything into the liquid. I don't think it would get hot at all.
 

RenaissancePuffer

Unregistered Supplier
ECF Veteran
After 2 full days of vaping on it (5 refills on a penstyle), my RN4072 atty went cold :( It was maybe a week old. I am not sure if the mod doesn't keep the atty wet enough to run at 6V, or if I just had an atty that wasn't going to live a long life. I got great vapor the entire time, but I did get the dry atty taste every 3rd or 4th puff in succession. I did find a way to work with it. I would take a couple of quick 1 second primer puffs, to heat the polyfill up, then it seemed to provide sufficient (?) liquid to the atty.

I will continue to use this however for 3.7V vaping, it works pretty good. I don't know if there is a good substitute for dripping at 6V, you really have to keep the atty wet. Perhaps I'll give this a try with my 5V passthrough, and see how it does.

Oh, and this has been the only mod to completely dry out a cart. I look at the polyfill and it's white, then pull it out of the cart, and there is no liquid inside. What a wonderful sight to see :thumbs:
 

DC2

Tootie Puffer
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The greenie is made of nylon fiber. I don't think the straw would get hot enough to leech anything into the liquid. I don't think it would get hot at all.
I agree it won't get hot at all, but that is not my area of concern.
Things can still leach stuff into liquids they are sitting in, whether they get hot or not.

As an example, I can not drink bottled water if it has been opened for more than a day.
It starts to taste like plastic.

Ingesting whatever might leach is not a big concern for me.
Vaporizing whatever might leach is a concern though, because that changes things.

In the end, it is not a BIG concern for me, but I would like to know for sure.
:)
 

RKayne

Senior Member
ECF Veteran
Sep 1, 2009
211
1
Seattle
youcancook.today.com
We went out the other night, when we got home I popped off the end piece and refilled. I haven't refilled since. It's still going. Little tweaking here, I had to stuff the fill a bit in the spring so it would not come off on the atty, but aside from that? Fabulous. I ordered nylon springs to get away from any trace metals concern. In the meantime, though, I am going to continue to use this same spring that I liberated from a standard pen.
 

kreiderb

Full Member
Oct 2, 2009
21
0
Denver, CO
We went out the other night, when we got home I popped off the end piece and refilled. I haven't refilled since. It's still going. Little tweaking here, I had to stuff the fill a bit in the spring so it would not come off on the atty, but aside from that? Fabulous. I ordered nylon springs to get away from any trace metals concern. In the meantime, though, I am going to continue to use this same spring that I liberated from a standard pen.

Where did you order nylon springs from?
 

ProfessorDaffy

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Jun 12, 2009
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I used a drinking straw cut to length instead of a spring or the cut piece from the rubber cap. Displaces less liquid than the rubber piece and no metal to corrode.

I also used a piece of a greenie scrubber for the plug. Press the cart mouth on the greenie and it leaves an impression to cut around. Just make it slightly larger, so it seals the opening. The liquid chamber itself never gets hot, so no worries about the straw melting.

Strawwithplug.jpg

I did the exact same thing last night! I was thinking what would support the "filler plug". I was thinking maybe a vertical coffee stirrer (who hasn't stolen a handful of those from work!) but I though fluid would be wasted or trapped in the tube itself and then I thought of a drinking straw. I have some cheap ones (thinner then the kind you get at a fast food place). I dismissed the idea because it hugged the wall too tightly and I was afraid the plug would go into the hole. It was extremely form fitting. Put in on the back burner until I could find an even thinner straw. I even folded it in half to make it more centered, but it seemed to take up too much space.

I also remember reading about the horizontal spring to press the fibers up into the atomizer from a few months back, but nothing really came of it. Just one of a million ideas thrown around, but I couldn't wrap my brain around it at the time. Seemed more like a solution for having to fluff up the fibers. The vertical spring seems to make a lot of sense in how much space it leaves for liquid.

There's probably going to be a million variations of this, I'm just glad there's enough evidence that the theory works. Kudos again, Scotty. Besides, nobody ever remembers who invented what. It's who makes it famous, right. =)

As for cutting off 2mm off the end of a cartridge cap. NEVER! I actually have a need for those caps now and I'm down to like three of them! But that does sound like a good solution for 801's and 901's that don't have a ledge.

--Prof Daffy
P.S. The water sponge bottle was a brilliant visual demonstration of the principal.
P.P.S. I did dismiss the straw a little quickly and might revisit the concept.
 

ProfessorDaffy

Super Member
ECF Veteran
Jun 12, 2009
576
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Did a search of all ecig forums, cannot find AFS?

AFS(Auto Feeding System). I think supposed to be a 4ml tank of some sort that fills the cart as you use up the juice. I've seen similar items with little tanks full of juice and tubes to feed into a modified cart. Personally, I prefer to keep by e-juice supply in my pocket where it belongs not dangling off the end of my e-cig. :)

The ADM adds juice. Not weight. You don't top off. You just fill'er up.

--Prof Daffy
P.S. Sorry, couldn't find a picture of the thing.
 

anim8r

Super Member
ECF Veteran
Oct 11, 2009
471
9
DC
after a whole day with this mod, I'm back to using tulle as my filler.

It drained perfectly the first time around, but for some reason, today my juice has been tasting like horse sweat, and I have to remove the cart and stab the polyfill with a needle to get the juice to soak the poly again. I'm using a third of the supplied poly.

I don't know if it's the poly-fill from the manufacturer of the blank carts I have, or a reaction of it with the spring... totally confused, since it worked so awesomely on the first cart, but with the tulle back in place and the spring now gone, my juice is back to being delicious.

Maybe it's my type of pen spring :confused:
 
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Scottbee

Vaping Master
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Sep 18, 2009
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Okauchee Lake, WI
after a whole day with this mod, I'm back to using tulle as my filler.

It drained perfectly the first time around, but for some reason, today my juice has been tasting like horse sweat, and I have to remove the cart and stab the polyfill with a needle to get the juice to soak the poly again. I'm using a third of the supplied poly.

I don't know if it's the poly-fill from the manufacturer of the blank carts I have, or a reaction of it with the spring... totally confused, since it worked so awesomely on the first cart, but with the tulle back in place and the spring now gone, my juice is back to being delicious.

Maybe it's my type of pen spring :confused:

That could very well be! I noticed that the spring that I grabbed is turning my liquid reddish/orange. And it's not rust.

Lucky for me, I have a very nice selection of Lee stainless steel springs.. and I'll just be grabbing one of those.. or switching to a straw like Kristin recommended.
 
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