Ipv4s help needed

[Paul lamb]

Hi

I recently switched from an evic VT to an ipv4s and I find the evic performed better which makes me feel like I'm doing something wrong as I believe the ipv4s is a lot better piece of kit.

With the evic I could hear the temp control working warming up shutting off etc.

With the ipv4s I have joules which I don't fully understand but I I set the joules at lets say 40 and temp at 500f I take it the joules will ramp up the temp and stop at 500f and prevent a dry/burnt hit?

Please let me soak in your knowledge

 

[Paul lamb]

The way I see the evic working is

Set wattage at 60w
Set temp at 500f

The device doesn't use the whole 60w to meet the 500f it fluctuates until the desired temp is met.

With the ipv4s I feel it is not as good as I keep getting dry hits (unless I'm using it wrong)

I should be able to set it at 50j and set temp yes? And the device SHOULD use the required joules to meet my temp setting?

Someone help lol

 

[GeorgeS]

It is all in the build: size of coil and wicking.

IMHO: anything north of 30J is overkill for most but the largest builds.

The YiHi chips will monitor the "slope" of the temperature rise when firing, if it calculates the slope (rise) is to steep it will assume a 'dry coil' and shut down. This is very easy to test by mounting a tank, setting the ohms and hitting the fire button. (don't draw on the drip tip)

In a perfect world (build/joules/temp settings) you ought to be able to hold the fire button as long as you'd want to (or until the hit timer expires) without getting the dreaded "dry coil" message.

I usually build 8-10 wraps of 28-32AWG Ni200 or Ti (IMHO: fairly small builds) and can easily get "dry coil" messages if the joules is set to high. (I'm currently using 15J on a 0.34ohm Ti build @ 380F)

I've tried 3.5mm ID coils which seem to take forever (and lots of power) to heat up - way to much wick creating a ginormous heatsink for my little coil to heat up. 2.0mm ID coils are a PITA to wick as the 32AWG wire needed to create enough ohms is a PITA. Once built very little power is needed and the coil will heat/cool almost instantly. The smaller ID coils can be over driven very easily.

 

[AntnyMikal]

I run my IPV4S at 65-80j 450-550f. Velocity rda spaced 8-10 wraps 2.4 ID reading .15-.2ohms wicked with rayon or KGD. Spider Silk 26ga tiranium.

No dry hits. It will start to pulse as the wick dries and I can still get 5-6 pulls before it even really starts feeling slightly dry with flavor drop.

Obviously if I turn down the power the pulse becomes less noticeable. The joules just gets it to temp faster, for me the higher joules are preferred. It Keeps spitback down and I get that instant warm pull at the set temp.

Don't forget to lock resistance in. Good quality batteries? Tight connection in post or coils.