Needed: introduction to temp control

[ant]

Anyone have a good tech reference on the subject? I think as I have little understanding i may be using the wrong keywords on youtube. I only want to understand the process at this time.
TIA
The Ant

[Roscopecotrain]

VapingBad is your man.

[VapingBad]

I have not seen any, but the basics are choose a wire that you can get a good build in your atty (metal & diameter) as different mods have different min resistances, some make it hard to get the resistance high enough with Ni200 and they support different wires, Ni200 being the most common and most accurate. It maybe best to look for a guide using the mod you have are going to get as they can vary enough to get confusing. BTW if you find a guide and they say you should lock the resistance find another guide, actually there are a few mods that force you to lock the res but generally it is only as a last resort for poor atty connections.

A atty with solid connections is essential, poorly machined through holes can be a problem, as can over complicated construction (too many pieces in the construction of the atty).

What mod and atty do you intend to use?

[tim]

The first thing you need to know is that it is "temperature limiting" and not control. But there are lots of sites out there which discuss it ant Also, be aware that different wire behaves differently.

It is still a new(ish) development.

[VapingBad]

Mar 31, 2016 22:16:10 GMT tim said:

The first thing you need to know is that it is "temperature limiting" and not control. But there are lots of sites out there which discuss it ant Also, be aware that different wire behaves differently.

It is still a new(ish) development.

The DNA 40 hit the streets in October 2014 and is still one of the best IMO, but it is developing in terms of extra features.

[VapingBad]

The pBusardo DNA 40 launch video is a reasonable start, as it was new then and it had to be explained from the ground up.

[Postmodern Smoking]

Mar 31, 2016 22:03:05 GMT ant said:

Anyone have a good tech reference on the subject? I think as I have little understanding i may be using the wrong keywords on youtube. I only want to understand the process at this time.
TIA
The Ant

A TC mod (set to the appropriate wire material setting) senses the temperature of the coil (by measuring the small change in the wires resistivity with change in temperature) and limits the current to maintain the set temperature.

[tim]

Yeah Jon VapingBad, But... mobile phones came out in the eighties, and the took a few years to get where they are.

Not dissing DNA, Evolv

[VapingBad]

In the graph the coil temp is in red, the power in green and res in purple. You can see at first the mod supplies very high power until the coil get close to temperature, it can monitor this by the increase in resistance you can see in the purple line. Then once the coil is at temp the mod reduces the power to stop the temp going beyond the limit.


That is the more common style of using it, but Evolv envisioned it as still using watts as the main adjustment and not just using temp to control the power, a bit like this I just did quickly for this post.

[VapingBad]

Mar 31, 2016 22:26:53 GMT tim said:

Yeah Jon VapingBad , But... mobile phones came out in the eighties, and the took a few years to get where they are.

Not dissing DNA, Evolv

I know, but the basic tech is proven, no one would have called VW new 18 months after the Darwin launched.  Vapers are finding better and better set ups all the time and the accuracy & flexibility are improving.

[tim]

They are VapingBad, but, as the op is asking for hard facts about the "process", which is still being developed, it's difficult to give hard facts. As you say, vapers are finding out the answers. So the response cannot be absolutely accurate.

[VapingBad]

We will have to disagree on that tim the process is well established, here is a flow chart I did for the DNA 200 and apart from the user settable preheat parameters it would be the same for the first temp limiting board. As I said it is getting more flexible and accurate, but the basic process is the same.

(Edit: cleaned up the chart a bit and used colour to group the 3 main sub processes)

[tim]

Mar 31, 2016 23:01:39 GMT VapingBad said:

We will have to disagree on that tim the process is well established, here is a flow chart I did for the DNA 200 and apart from the user settable preheat parameters it would be the same for the first temp limiting board. As I said it is getting more flexible and accurate, but the basic process is the same.

I know all this Jon, which is why I won't disagree with what Evolv are doing, but atty differences/build qualities etc. are not factored in yet. That's all I mean.

[yorkshireman]

Makes me want to go back to cigalikes,it's getting too complicated.

[VapingBad]

Apr 1, 2016 9:55:42 GMT yorkshireman said:

Makes me want to go back to cigalikes,it's getting too complicated.

It really isn't you don't need to understand the details any more than you need to understand how a car engine is managed to be able to drive one. 

The first graph I posted shows the benefit of temp limiting, if that had not been temp limited the temperature (red) would have been far higher, it needed 3 times more power (green) to get the coils up to temp than it needed 4 seconds later.