DNA 60 TC Weirdness

[jaygee]

I have a new Lost Vape Epetite DNA 60 mod. I am running an Eden Mods Snapdragon V1.5

My build is a single coil SS316L 32AWG (Stealth Vape UK) 2.5mm ID, 6 wraps spaced, and coming out at around 1.46 ohms, wicked with cotton.

I am using 50/50 bestcigliquid (UK) NET tobacco. Tend to keep the airflow pretty tight for MTL.

I'm running default DNA 60 settings for SS316, and I tend to keep the temp at between 200 - 220 C

So. The coils run superbly for around half a day, then the weirdness starts.

    

As you can see, the live Ohms are dropping out, and this seems to be borking the TC.

I'm pretty new to building coils, but I'm a bit OCD, so they tend to be pretty neat. Also, the builds are super simple. They are within spec right?

Yes, the contacts are good. I used the escribe atomiser analyser tool to see if there were any problems and things were stable.

This is not the only build the issues has cropped up on. I have made a few coils to test things all with the same wire 5 wraps at 1.25 Ohms and 6 wraps at 1.5. I also tried a similar buid in my Digiflavor Siren, with the same issue.

I use SS, because it seems to be the simplest to build with. I use 32AWG, because I can get the ohms I want without too much wire.

I am lucky in that I can vape at my desk at work, but don't want to offend people and tend to sip away all day.

What am I doing wrong?

[Spector NS5 RD]

i'm not quite sure you're doing anything wrong, yet. is SS316 the only material that is giving you a problem on the 60? i ask because i too am having a problem with SS TC on the 60 and i am trying to gather other people's SS TC experiences. there might be some tweaking of the SS regulation on the 60 that is needed. another question for you, does Device monitor's graph periodically drop out (large gaps in the parameter lines) on you when firing the devices? i'm assuming yes, judging from your screenshot. 

[jaygee]

Thank you for the reply.

I haven't tried any other wire actually. The main reason being that I am aiming for higher ohm builds.

I have some Ni200 28 in my box, so I'll give it a try. This will obviously be sub-ohm.

Giving the predominance of sub-ohm vaping, could it be the boards are tuned for this?

Another thing I didn't mention, was that the issue appears more often after I have dripped. I thought it may have been because I was flooding the coil, but I don't think so.

Could the conductivity of the juice be an issue? I wouldn't think so.

What I have noticed with the TC issue, was that if I dropout of TC for a few puffs, and switch back, it goes away. Another plus for SS.

As to device monitor, It may be that I'm running escribe on VirtualBox on a Mac. I assumed the gaps in the cold ohms reading were because of this. There is a bit of stutter on the chart, but no more than 1/4 second or so.

[Spector NS5 RD]

jaygee said:

Thank you for the reply.

I haven't tried any other wire actually. The main reason being that I am aiming for higher ohm builds.

I have some Ni200 28 in my box, so I'll give it a try. This will obviously be sub-ohm.

Giving the predominance of sub-ohm vaping, could it be the boards are tuned for this?

Another thing I didn't mention, was that the issue appears more often after I have dripped. I thought it may have been because I was flooding the coil, but I don't think so.

Could the conductivity of the juice be an issue? I wouldn't think so.

What I have noticed with the TC issue, was that if I dropout of TC for a few puffs, and switch back, it goes away. Another plus for SS.

As to device monitor, It may be that I'm running escribe on VirtualBox on a Mac. I assumed the gaps in the cold ohms reading were because of this. There is a bit of stutter on the chart, but no more than 1/4 second or so.

if you want to try another material you can but i'm mainly interested in SS regulation on the 60. i don't think the res of your coil is the problem. are you getting the "ohms too high" message on your epetite screen at anytime? i honestly think it's an intermittent issue with the SS regulation on the 60's firmware. i have the same gaps occur in DM once in a great while but not as severe as what you're experiencing. i am using a windows PC though. is there any way you can get access to a PC to try it out? if not, that's ok. do you have any other DNA devices you can connect to vitualbox to see if the gapping continues or stops?

[Wayneo]

@jaygee 

Here’s an excellent MacOS native monitor for DNA devices. Super fast, and quick.

https://github.com/hobbyquaker/dna-monitor                   I find the display is much cleaner once you stop your vape, compared to escribe

I have seen those ‘dropouts’ infrequently while running escribe via Vmware’s Fusion product, but only with 1 of my many DNAs. I think my only 75, but I’m old and forgetful. That was one funky image you posted.

Edit: In looking at your print screen again, could you humor me with one more at the following settings.

No preheat, no punch. 25 watts. Same coil.

[jaygee]

I'm only really interested in SS too. It just seems like the best material for my limited requirements.

I'll give Ni a go, just because I was going to do it anyway for fun. If there are any issues, I'll post them up here.

I was going to rummage around at the office to see if I can find an old laptop, but ended up getting VirtualBox to run easily. I'll have rummage next week.

I'm afraid this is my only DNA device. I'm not sure that I need any more at the moment.

I said that about bicycles when I first started riding, and I now have 5...

[jaygee]

Thank you @Wayne. I'll take a look. Nice to see a Mac specific monitor. I'm looking at setting up another box with more resources too.

edit: Thank you for the link. It is handy.

[jaygee]

OK. I set up a test profile. I set the power to 25 and preheat settings to their lowest (power: 1, punch: 1, time: 0). I'm a noob, so I am probably doing things wrong. There still is some punch on the graph.

The issues above are not present, as they are intermittent. This graph looks better.

   

[Spector NS5 RD]

that actually looks pretty good. i think the problem comes about at a high wattage setting. basically running the 60 at it's limits BUT still within it's capabilities. can you set your time scale to 10 seconds for me? located in device monitor "graph options" "appearance" "set time scale". keep your wattage at 60w and let the board do the regulation. thanks for contributing jaygee. of course, take a few puffs with a wet wick and post the screenshot.

[jaygee]

Here you go

 

[jaygee]

And another, showing the screen stutter I'm getting. The whole monitor freezes briefly, but the mod itself is functioning as expected. I think it is the performance of the virtual machine. I tested the OS native monitor, and there were no dropouts.

[Spector NS5 RD]

it looks like the 60 needs some tweaking in the SS TC regulation area. it's a fairly new board and with a little time evolv will have FW updates to remedy any issues. thanks for sharing this with me jaygee. unfortunately i can't offer a solution, as of right now, to help you with SS TC on the 60. i will say it performs great with Ti and most likely Ni due to their higher TCR. if you find a workaround for SS TC until this issue is sorted out on the 60, post it so others can try it.

[jaygee]

Cheers. I'll post up here if I find any solutions. The current coil se ms to be behaving for now.