WISMEC Reuleaux RX200 TC

[deezdrama]

Firmware is updated. Tried a new set of Ti coils. 3.5mm ID , 5-6 wrap 26awg. .17ohm.

Set to TC in TI mode. 4 clicks to set watts low. Ive tried 20w....still temp protection, went all the way down to 1w lol.... wouldnt get up to temp. Played around with wattage....it either doesnt get hot enough to vape or it goes into temp protection and stops firing instantly.

A buddy at work got his rx200 today, he tried his in TC with Ni wire.... he has same exact issue.

What a waste.... i should of went with the fuchai. I wanted this for my first TC mod and it only works in power mode.

Also....battery life isnt that good.
Using a married set of new lg he4's it barely makes it a whole day of moderate vaping at work.

I really love the feel of this mod and it works great in power mode.... ive tried 3 different Ti builds using Unkamen wire. It always hits "temp protection" and wont fire at all. Same exact issue with buddy at works rx200 bought from a different seller and using Ni

 

[Wingsfan0310]

Out of curiosity, what do you have your temperature set at? Not sure if your coils are spaced or contact, but I used only spaced for TC.

 

[Jalcide]

.17 ohms is spot on for that build spec. So, it's not a resistance issue (probably rules out spacing issues, as well).

That's concerning.

I'll check that build on mine when I get a chance. Haven't put a dual TC build on my RX200 yet.

 

[Wingsfan0310]

.17 ohms is spot on for that build spec. So, it's not a resistance issue (probably rules out spacing issues, as well).

That's concerning.

I'll check that build on mine when I get a chance. Haven't put a dual TC build on my RX200 yet.

Mainly I was wondering what he had his temperature set to since it wasn't mentioned. If he has it set to low, (like in the 200's F) that would explain why it's immediately going into temperature protect without producing any vapor.

Cheers,
Steve

 

[deezdrama]

Spaced coils and tried temps in the 200-400f range.

Do you guys roll and cram your cotton in like ive seen alot of people doing lately? Would that help? I dont cram a ton in my coils but its not loose either. Thought about trying this out but went back to my clapton kanthal coils and power mode.
Been working 12s and have to work tomorrow and too tired to mess with it.

I keep putting this off and hope I dont end up with a mod that has a faulty pcb when I could of sent it back.

Ive read nothing but good reviews....but buddy at work says he read a bunch of bad reviews and he has same exact issue I am having but hes using Ni.

 

[Jalcide]

Mainly I was wondering what he had his temperature set to since it wasn't mentioned. If he has it set to low, (like in the 200's F) that would explain why it's immediately going into temperature protect without producing any vapor.

Cheers,
Steve

Indeed. I was about to ask the same thing, but you beat me to it.

I'm building this f'r right now. Will report back.

 

[Jalcide]

I recreated your build to within a hundredth of an ohm (.18).

Confirmed.

You don't have a defective unit. The RX200 doesn't seem to be well-optimized for dual TC coils (at that low of a resistance).

Temperature Protect, even with good airflow over the coils and snug (but not too snug) cotton, was triggered at 20 watts at 400F.

I was able to avoid the TP message at 20 watts at exactly 550F.

(20 watts was of course not enough to drive a build like this, it was just a test to see when TP would not be triggered.)

But, Temperature Protect doesn't seem to be a brick-wall limiter. Keeping it at 550F and upping the wattage to 45 watts was then producing a denser vape.

Going up to 60 watts seemed to get slightly denser, but there were diminishing returns above that (at 550F).

I was able to get a warm, more cloud-chasing vape at 600F, 75 watts, but this would not be enough for the true chaser (which is not me).

I then removed a coil, let it cool, reattached for "new coil" and the remaining single coil was delivering plenty of vapor in the below 500F range.

Conclusion: The RX200 is not optimized for dual TC coils (at these lower resistances).

Wismec should add a "dual coil" option in a firmware update, like some other mods have employed, to address the raw physics behind this issue.

Or, just deal with the lower resistances better, in general (it may not need to be a "dual coil" setting).

However, I think a flavor-chaser would still find a range that works with dual TC coils. 580F would have been fine for my taste.

In the meantime, I suspect a slightly higher resistance build (maybe dual 3.5mm 10 wrap) would work better.

Also, for what it's worth, this same build (single coil after I ripped one out) on my DNA200, same settings, was delivering an almost identical vape as the RX200. I should have tested when both coils were in, but didn't think of it.

 

[deezdrama]

Thanks for all your testing!
Im running an aromamizer rdta so kinda need to run duals.

So you think going up on resistance will help out? Im running vert coils so could throw 10 wraps each on there if I had to. I like to run 3 or 3.5mm coils on this rdta since the juice is fed from bottom of the deck by 2 holes and with a vertical coil I need a fat wick to cover both holes.
Ill try dual 3mm 8 wrap stainless tomorrow.

Thanks again.
Anyone else running dual coil TC?

 

[PapaGeno21]

That explains a lot. I ran a single coil NI200 and it was fine in TC, but dual coil protected immediately. Thanks for clearing that up!

No big deal to me, I'm not a big fan of TC anyways.

 

[Jalcide]

Thanks for all your testing!
Im running an aromamizer rdta so kinda need to run duals.

So you think going up on resistance will help out? Im running vert coils so could throw 10 wraps each on there if I had to. I like to run 3 or 3.5mm coils on this rdta since the juice is fed from bottom of the deck by 2 holes and with a vertical coil I need a fat wick to cover both holes.
Ill try dual 3mm 8 wrap stainless tomorrow.

Thanks again.
Anyone else running dual coil TC?

Glad to have helped at least remove the "defective unit" concern.

Regarding higher resistance, I think so, because it's not a raw power issue, it's just a TCR issue. A higher resistance build might fall within the sweet spot of the temp range better. Not sure though, would need to test.

 

[Gallant]

since the juice is fed from bottom of the deck by 2 holes and with a vertical coil I need a fat wick to cover both holes.

what are the chances there is an issue with your fat wicks leading to a dry hit & TC kicks in to prevents that? AFAIK wicking the aromamizer is tricky specially when it comes how far the cotton goes down into juice holes.

 

[ismokeinbinary]

what are the chances there is an issue with your fat wicks leading to a dry hit & TC kicks in to prevents that? AFAIK wicking the aromamizer is tricky specially when it comes how far the cotton goes down into juice holes.

0 chance.
And the Aromamizer is probably the easiest tank to wick, all that matters is the cotton is fluffed.
And that's disappointing, I have an RX200 otw and was planning dual SS coils in TC in my Aromamizer. Hope they release an update soon.

 

[Jalcide]

New test...

Dual 26 gauge, spaced, 3mm 10 wrap, Ti coils at .24 solved the issue. Even going up in resistance that little makes the difference.

The 20 watt test avoided TP at 430F (really 420F for a shorter hit).

480F, 60 watts was the start of a warm, respectable cloud-chasing TC-style vape.

75 watts at 530F was as far as I would personally go with a TC build like this and there is still some temp headroom to abuse.

I suspect a 3.5mm 10 wrap dual coil would raise the resistance enough, even more, to satisfy the most extreme TC-style cloud-chaser. I say "TC Style" because the hardcore cloud-chasers I'm familiar with, always act surprised when a TC build is chucking clouds to their satisfaction. So extreme room-fogging expectations should be lowered a bit when doing TC, in general, I think.

This time, I remembered to test the build on the DNA200.

The RX200 and DNA were pretty well matched. The DNA did seem to produce a little more vapor at the same settings. I had to add about 30 degrees F to the RX to get an equivalent vape. This was using the Steam Engine Ti profile on the DNA.

 

[atroph]

Problem is that with duals you are changing your TCR...... No way around it unless you have the ability to adjust the TCR directly (crosses fingers).

My eVIC VT worked ok with twisted kanthal and ni200 or with ni200 duals, but it just wasn't the same without some moderate to major temp adjustments.

You have to consider what TC is for. To prevent dry hits from single coils of materials that the device is calibrated for. You deviate out of this specification and welcome to uncharted territory.

0.02 and best of luck.

 

[Jalcide]

I don't think dual coils want a changed TCR. The material is the same.

I think it's simply the fact that dual coils are inherently half the resistance.

It might be that the RX200 isn't as accurate in that resistance range.

The DNA200 has quite a few breakpoints in the TCR curves to make it more accurate. I'm pretty sure the RX doesn't and is just a linear approximation (a single TCR value). It's probably just that.

 

[Jalcide]

It would be easy to test. We'd just have to find 23 gauge Ti and make a single coil, 6 wrap around a 3mm bit.

That would come out to .17 ohms.

I suspect it would exhibit the same issue as the .17 dual coils.

 

[atroph]

I don't think dual coils want a changed TCR. The material is the same.

No, no, no, your logic is flawed. The individual TCR per coils IS indeed the same, but when you put them in parallel the circuit as a whole will react and look differently to the resistance measuring device per temperature degree increase.

Unfortunately I am under the influence or I'd positively disprove your theory.

Too drunk to do the maths right now. Will present fancy graphs/spreadsheet later...



I think it's simply the fact that dual coils are inherently half the resistance.

Yes and thus affects the TCR because the resistance jumps differently per degree C/F/K or whatever the mod uses for a reference.

It might be that the RX200 isn't as accurate in that resistance range.

I doubt it. A mod that can accurately read in the milliohms will be accurate (to a degree) no matter what end of the spectrum it is in.

The DNA200 has quite a few breakpoints in the TCR curves to make it more accurate. I'm pretty sure the RX doesn't and is just a linear approximation (a single TCR value). It's probably just that.

Mmmm. I agree with this. Most if not all TC mods with the exception with the DNA 200 with its .CSV breakpoint importation will be a linear device. The microcontroller coding is just plain simple and makes sense (in general) because it is still very accurate for most vapers.

 

[Portertown]

One major problem that can show up with dual coils with temp control is the clamping of the wire in the post holes. If the atomizer uses a common hole for two wires, sometimes one wire does not get a really good connection. One wire crossing over another wire in the post hole will always be a problem. The coils will fire ok, but the mod will have trouble getting a good read on the resistance change.
The higher the resistance of the build(up to the max the board accepts), the better temp control will work. Does not matter about which type wire you are using. Let's say that the resistance of a wire raises 10% from room temp to 410 F. A .1 ohm coil's resistance only rises to 1.1 ohm (.01 ohm increase). A .7 ohm coil's resistance rises to .77 ohm (.07 ohm increase).

I have been fighting with my new Sub Zero rda trying to get dual coils of 430 stainless steel to work in temp control. These coils had a combined ohm reading of .3 ohms and where 3mm in size.
I rebuilt with a single 4.25 mm coil with an ohm reading of .72 ohms and I am getting a much better, constant vape.

This was on a DNA200 Reuleaux, using a single TCR of .00138 for the 430 stainless steel. I got the same results on a mod with the Yihi J board/chip.

 

[Rabbit Slayer]

Unfortunately I am under the influence

Maybe you should have waited until you were at 100% before posting then

 

[reddog01]

Have had my rx 200 a few days myself and it does well in low wattage mode. Still figure out tc in nickel and steel. Tends to burn hot in both and suck power in tc. Not sure if its resistance level or build. Like the extra power though, but would like more wattage control in tc like my wolf has.