Why do VW devices even exist?

[InTheShade]

They aren't. Very few cars are automatic; the great majority are manual.

Oh... you live in the USA... that explains it ;-)

Probably because you allow kids as young as 15 a driving license. Whereas in the UK, we make them wait until they're 18 to take the test.

To be fair you can get a learners permit at 14 in some states. If we're going to be snarky at least let's snark with facts

 

[Bonkers]

I learned to drive on a stick. nothing comes close to the feeling of helplessness as you're rolling backwards on a hill and there is a car behind you and you just learned how to drive a stick. good times, good times

 

[rurwin]

To be fair you can get a learners permit at 14 in some states. If we're going to be snarky at least let's snark with facts

Oh I did. In fact I cheated a bit in order to snark more. 15 year-olds can get a learner's permit in Indiana, where Midniteoyl is. But the the age 18 I gave is for a full license.

Actually it is more likely the fact that if you pass your test here on an automatic you are not allowed to drive manual. So almost everyone elects to learn stick. Once the public preference passes a certain point it becomes self-sustaining and the other sort of transmission becomes hard to find.

But that doesn't analogise well with VV vs VW.

@Bonkers. Right with you there

My first vehicle (my grandfather's cast-off) was an automatic, and in my opinion the only real advantage is that it had a foot-switch to dip the headlights. That is amazingly useful, but I've never seen it since. The first vehicle I bought was a VW. Unfortunately, to spoil the pun, it was manual.

 

[tchavei]

A manual transmission works just fine too... So why are all the cars automatic?

On your side of the pond. The only ones here driving automatics are old granny's that never were able to drive a manual car (or any car for that matter) and some few Mercedes editions (cls 350 for example) that aren't made in manual mode but they do have tiptronic so you still can control the gear you're in.




Regards
Tony

Sent from my GT-I9195 through Tapatalk

 

[dr g]

A 0.5 ohm coil will generally be made with thicker wire than a 1.8 ohm coil. That changes the wire mass, wire thickness of course and surface area of the coil and all of that will make the two coils vape different.

I think at this point we shouldn't be making assumptions about which coil is made with thicker wire. We should just say the builds could be different..

 

[bluecat]

Better question would be why not have them?

Some people use a toaster oven to toast bread, others use a toaster and other still use an oven.

It is all about choices. Choices are good. When a society no longer has choices, that is bad.

I like my VW. I like my VV. I like my coil building.

 

[DaveP]

It's all about convenience. If you aren't familiar with ohm's law, you have to play with voltage to get the vape right with a VV mod when you change atomizer resistance. With a VW mod (as Baditude said earlier) you just screw on the new atomizer and the vape wattage is the same. The voltage is changed by the circuitry to match the resistance of the new coil and it's all transparent to the user.

Or, you can familiarize yourself with ohm's law and do the math yourself on a VV mod.

 

[Ryedan]

I think at this point we shouldn't be making assumptions about which coil is made with thicker wire. We should just say the builds could be different..

Hmm, I wouldn't make a 1.8 ohm coil with wire as thick as for a 0.5 ohm coil, but I don't make 1.8 ohm coils any more so I might not be up on the latest developments in coil design. It would be a long coil. Does anyone do that these days?

 

[Topwater Elvis]

Why do VW devices even exist?
To give folks more choices, more features, which leads to more folks finding a satisfactory vape.

I've owned quite a few VW devices, for me/my vaping style Ive seen no benefit whatsoever, but that dang sure doesn't mean others folks will not or do not.

As soon as the analogies begin, rational discussion ends.

 

[Peter_C]

With vv you need to make some simple math. With VW you don't need to. With VW, each time there is a change in resistance, the mod should adjust voltage. I know for fact that the sigelei zMax will keep measuring the coil even while firing and adjust the voltage x times per second to keep the selected wattage. Not so sure if my evic s does the same as it reads the resistance on boot up but I do know it will stop firing if you start to unscrew the atty during a draw so there is some kind of feedback during firing.


Regards
Tony

B I N G O ~!

I'm a simple kind of guy, I vape instead of smoke. Vaping (for me currently) is not a hobby, it is harm reduction. I like to vape at eight watts. And if I change the head on my topper and it's a higher or lower ohms - I then must think (and never remember) but with a V W device, it's no big deal. Plus, some coils will rarely change their ohms slightly with age - again, automagic adjustment - nice and simple for a nice simple guy like me.

 

[K-Space]

So do I set my device to vv or vw

 

[Ryedan]

They aren't. Very few cars are automatic; the great majority are manual.

Oh... you live in the USA... that explains it ;-)

Probably because you allow kids as young as 15 a driving license. Whereas in the UK, we make them wait until they're 18 to take the test.

I learned to drive at 15 in Canada and got my license at 16. I learned on an automatic transmission in our winter climate (which is challenging) but I switched to a manual immediately with no further formal instruction. Your dig at Americans is obvious and surprising. I thought you were more mature than that, but I was obviously mistaken.

 

[twgbonehead]

I kind of wondered the same thing, but in a different way. I think the VW devices provide a constant current and vary voltage (please correct me if I'm wrong), and the thing that gets me is; with the increase in resistance due to the heating of the coil at a constant current the VW would then increase the voltage as the device heats up to maintain a steady wattage. That is that there is an increase in voltage with heat to maintain wattage.

I would think a VV device would be better, the reason why is if it maintains a constant voltage at a lower cold coil resistance it will push more current through initially to heat up faster and the resistor will then start to restrict the current as the resistance increases due to heat. This seems like a better approach to me.

Am I anywhere in the ballpark of correctness?

First, coils with nichrome/kanthal have very low temperature coefficients. Their resistance doesn't change noticeably between cold and vaping-temperature. Titanium, on the other hand, does have a significant change in resistance (and yes, does heat up much faster on VV than on VW).

However, your statement hilighted above, doesn't make sense. You can't set both current and voltage. What VW does is set the voltage and MEASURE the current, tweaking the voltage up or down until V*I = the desired power.

 

[yzer]

I learned to drive on a stick. nothing comes close to the feeling of helplessness as you're rolling backwards on a hill and there is a car behind you and you just learned how to drive a stick. good times, good times

One usually learn how to use the second stick (the one connected to the rear brakes) quickly in that situation.

 

[bluecat]

A manual transmission works just fine too... So why are all the cars automatic?

My '68 Shelby Cobra isn't. Still kicking myself because I sold it.

 

[yzer]

My first car was a manual ('69 Austin Healey Sprite) I purchased in 1971. To this day I have never owned a vehicle with an automatic transmission although we have bought them for my wife and daughter. I drive a WRX now. I vape VW, though.

 

[tchavei]

One usually learn how to use the second stick (the one connected to the rear brakes) quickly in that situation.

Not all cars have those though

Regards
Tony

Sent from my GT-I9195 through Tapatalk

 

[DaveP]

I vape a VV device most of the time, although I have a VW mod. I just set the voltage to 2v above the resistance value and tweak from there.

Atomizer efficiency plays deeply into the voltage and wattage that actually produces the best vape. A Nautilus may require lower voltage than a Protank. A carto may also not need to be driven that hard if it's new. Kayfun depends on the gauge wire. Heavier wire like 26ga and 28ga heats slower than 32ga Kanthal. As any coil ages, it may be necessary to raise the voltage or wattage a bit.

It's all relative. What we really need is a variable temperature system.

 

[rurwin]

Your dig at Americans is obvious and surprising. I thought you were more mature than that, but I was obviously mistaken.

Apologies if I caused offense; it wasn't intended. And definitely not mature here.

It's all relative. What we really need is a variable temperature system.

No, I don't think we do. It would improve control and understanding of the process, but it is something of a curate's egg. Firstly we would find that even temperature of whatever is being measured is still not fully indicative of the vape quality. Secondly it will complicate DIY builds, maybe to a great extent, depending on how it is done. And thirdly, it will give regulators the excuse to demand it in all devices in order to avoid contaminants.

 

[Midniteoyl]

this would be on a 30 watt vw device I can buy the surface area maybe but I'm not sure if my juice would burn faster if I used a higher ohm coil on my 30 watt mod. maybe but I'm not sure because again I'm back to 30 watts is 30 watts. I tend to think the higher ohm coil would pull less amps and be easier on your battery but because of the VW board I guess that thinking go out the window.

Your right, the higher ohm coil would pull less amps... However, the coil is also smaller and thus the heat is more concentrated.