dct poor performance

[chris27]

Hi TW

i've just purchased one of the new dual coil tanks. the performance for the first day was emense!! loved it, however day 2 it feels like i'm sucking through cotton wool and feels blocked and it's going thogh fluid rapidly

i've tried blowing it out and just get a load of fluid out of the bottom

I've tried cleaning it out

i've checked none of the holes are blocked


what am i doing wrong?

[cyborg]

You can expect to get through fluid rapidly; it’s the mature of the beast.
Try priming the carto again, the top filler can dry out.

[scrfasteddie]

Chris,

Same thing happened here to the first (and probably only) carts I used in mine.
About half way thru the second refill on both, they started to get tight and by the end of the tank
you can't hardly pull air thru them.
Some folks seem to love these things, but not me.

[ankido]

Funny you mention this.  I had this problem earlier today.  When I came home, i added some more drops of liquid in the carto to keep it wet.  I do see the liquid going bye bye during the day so something is working.  I guess the design is not meant to flow your liquid away.  The only problem as of now I have with the DCT is unscrewing it.  I have to use pliers. 

[chris27]

Hi All

I took my dct atty to bits last night and destroyed it in the process

what i found was that the central tube holding the atomisers had colapsed possibly due to heat as the mesh was burned, which was preventing the air flowing through hence the sensation of sucking through cotton wool.

only thing i can put this down to was using it continuously for hours

I'm taking care with my new atty, checking it's moist and using it less.... may have to go back to the cone attys once i've rewicked

hth

cheers

Chris

[Carl75]

I brought 4. 3 are dead after 3 days got hardly any vapour or flavour out of them at all after one 3.5m tank.  The one I have left is still going strong making lovely crackling noises which is probably the only way to tell they are working correctly. Surely these could be tested before being sent to customers. Prime them with some unflavoured juice, put them on a battery if they crackle it's a good one.

[tez77]

Im not sure why people are having these problems. My cartos seem to do 30ml easily, I wonder if it is related to the flavour of liquid. Darker liquids are probably more of an issue, the RL premixed strawberry I was vaping defintely seemed to gunk up the coils quicker than my absinthe mix or the RL menthol i've been vaping but still lasted 30ml before I decided to swap out.

I tend not to use the little bung that came with the cartos and from time to time I pop off the drip tip, pull the carto down until the top of it is just above the liquid level, then tilt the carto to pour some liquid from the tank into the carto to keep it well primed, not sure if it makes a big difference but Im definitely happy with the lifespan I get.

[jeffj4873]

The first thing. If you car having trouble getting a drag then check the center hole. Dual coils have a tendancy to burn to hot sometimes and it has melted the center hole on me once where I could get no draw. Mine uses fluid, but it seems modest, can normally see the bubbles from the 1mm hole.
If it melts the center tube than not enough fluid is getting into the material. What causes the burnt taste also. I really thank the 1mm should be opened to 2or 3 mm or another hole added. Dual just creates a lot of heat for these things.

If you look at a new carto you should be able to look right thru the center hole. One that is damaged, you can't see thru. Need a better tubing material that is hear resistant for their production. (Hint, Hint TW)

[tez77]

The first thing. If you car having trouble getting a drag then check the center hole. Dual coils have a tendancy to burn to hot sometimes and it has melted the center hole on me once where I could get no draw. Mine uses fluid, but it seems modest, can normally see the bubbles from the 1mm hole.
If it melts the center tube than not enough fluid is getting into the material. What causes the burnt taste also. I really thank the 1mm should be opened to 2or 3 mm or another hole added. Dual just creates a lot of heat for these things.

If you look at a new carto you should be able to look right thru the center hole. One that is damaged, you can't see thru. Need a better tubing material that is hear resistant for their production. (Hint, Hint TW)

Technically, there is no center tube in the cartos (see http://www.totallywicked-eliquid.com/forum/cartomisers-95/dct-7-days-later-gut-swapping-a-510-dc-carto/) , there is some tubing around the non insulated parts of the wiring which I assume is there to prevent shorting but this shouldnt melt as it is not in contact with the coils. There is some kind of wicking material wrapped around each coil that will burn up if run dry and then the outer wadding which will melt under extreme circumstances.

The carto I am using right now has done about 50ml of menthol and is showing no signs of packing in. I strongly believe the contributing factors to these things giving up are the liquid used (clear liquids give a longer lifespan than darker liquids) and more importantly keeping the top coil fed well. I top up my carto from the liquid in the tank and I really think that has helped enormously, ditch the rubber bung, it will allow you perform a quick top-up whenever you want. Just pop the drip tip off, slide the carto down into the tank and pour liquid from the tank into the top of the carto to keep it well primed. I do this about every half a tank or so now and as mentioned, the current carto just doesnt wont give up

[jeffj4873]

Tez
You do know alot about these things. There is still a something in there that helps hold the hole open in the center. Almost like piece of tube. I didn't cut mine open like you I just pulled it out breaking the coil wires. It kinda happened cause I shoved a paperclip wird in to clear the hole I could no longer see thru.
Your right on that little plastic end cap for the cart also. I ried it once and dang near burnt one up. It restricts the fluid leaching thru the 1mm hole. I have taken one cart that I haven't triedd yet and opened the hole to a 1/16 to see how that does. I think that a single 1mm hole is not enough. I really appreciate your insight in this as I learn what is best with these carto's

[tez77]

The only things inside a carto are what you see in the photo in the post I linked to. There is a small tube at the battery end but its metal and all part of the base IIRC. The only thing I can think is that the tubing that protects the uninsulated parts of the wiring has somehow slipped onto the coil and melted or was simply installed in the wrong place on yours? Of course, something could have changed in the carto design since I purchased mine but I think its probably unlikely.

I would agree that the 1mm hole could be bigger but providing you keep the carto well primed you should not have any issues. The top coil is the real problem, it suffers starvation and that's the first one to burn up the wicking material which makes the draw hard. I have a modified carto case in which I drilled 3x 1.5mm holes, top middle and bottom for a triple coil carto that I intend to use in the DCT. I don't know if there will be problems with flooding yet or if I will have issues once the fluid level drops below the height of the top hole but I am keen to see, just as soon as one of my current cartos give up I will give it a go and feed back here.

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