Davinci Pocket Vaporizer by Karma

So are you saying that when you look at it now with a flashlight at ~400F, you see absolutely 0 mystery vapor?

Don't believe the "resin" copout. If it offgasses the same on a brand new empty tank for 25 cycles. It is safe to conclude it is permanently off-gassing. Vaporzing doesn't actually produce much resin at all, and any that it possibly could would go away very quickly doing dry burns.

When it's burned and totally cleaned then burned again I see nothing. It does build up resin so there I disagree cause I can see it on the q-tip like I can with any of my vapes. The best one to see is the glass on the solo stem golden although I don't let it get like some of the guys. If you look in the solo thread back a few pages you will see one that doesn't even resemble a stem anymore.

I said it can in fact build a little bit of resin, so you're not really disagreeing with me. If it burns off quickly for you, great. If you see absolutely nothing coming out, go ahead and use it. I'm just wondering how many times I'm expected to cycle this mf before I can get the same result. 25 didn't do it for me.

with mine that 'mystery vapor' was pretty much gone after 1-2 cycles, at least strongly diminished

That is very interesting as I have 2 units in my hand that I cannot get to stop giving off vapor. 1 has had some herb loaded way in the past, the other has never been loaded ever.(also want to mention despite their different histories, they both do the exact same thing. same amount of mystery vapor that doesn't smell like herb.) Perhaps you are just telling yourself it is strongly diminished because you want it to be. If you do an objective test I bet you won't be able to get it to go away completely. That is the only result that would satisfy me and should be everyone else's standard as well. I've been here for a loong time before registering, I've owned or used almost every kind of vaporizer and has never occurred with any other device.

I'm not trying to call you a liar here either, but with the experience I've had I'm pretty much forced to conclude that most of these do offgass permanently.

Put me down as another owner who had moderate outgassing that went away with time at higher temperatures. This has been discussed to death IMO.

Some really enjoy this guy (I'm one), others seem to hate it. That's cool, there's lots of other vapes to pick from. Good luck to them, lots of good advice available on the various forums. Perhaps a Pax?

OF

You are right in the fact that this vape had something going on out of the box but I was a virgin at the time. I now have many vapes as you can see in my sig and I think I know the difference now. I have burned in all the vapes I have and they smelled like machine or electrical smells but it went away after a few burns. I did burn in the DV as well when I got it and I will say for a long time the taste wasn't great. If I can find when I bought it I would tell you but it was right when it was released. I don't even have a serial number on mine. So from then till now at some point that vapor went away. I have no reason to make it up in my head cause if it was gassing I don't need to use it I have others. I don't clean it that well often but when I do whatever vapor is coming out does go away but takes a bunch of burns after cleaning. This vape is very hard to clean and I even use a straw to suck out any particles.

Now if you have a new one and did 25 burns and it is still gassing I wouldn't use it either knowing what I know now. Return your units since you already tried two and get something else. May I suggest the INH since OF said pax lol. If you really want a wonderful clean taste the solo might be up your alley.

I myself love the DV but it is not at the top of my list since I got others I like better. Good luck finding what you need.

Im glad we can be civil, I just wish I could get an explanation and and an apology from davinci. Like I said their customer service is ignoring me again for the second time in a row. It's been a week and a half since they said I would get an email. Its frustrating having to call in so many times, just to speak with someone who really has no clue why its not working. But if they were a half-decent company they wouldn't be shipping offgassing units whatsoever in the first place.

That is true ej. I would call and ask for the boss if this jessica person isn't helping and making false promises which would really get to me. If she said we are low staffed cause we are all going on vacation I could handle that but not false promises so I hear you. I wouldn't even entertain speaking with her again or anyone else you have delt with previously.

From reading this thread they do care so they need to know that someone is not doing the right thing by a customer. Again I never dealt with them accept to ask one question when I first bought it. I have read people having the same issues as you. If you read back a few pages I think the owner gave his email and a special number. Maybe that will help

I don't think that was the owner, but I could be wrong. I think he was just posting a working number for support while they were having trouble. Here's my other problem with davinci. Someone from davinci has an account here and has been active in this thread pretending to care. That is an act. All it is. If they cared, they would answer my question which I have repeated like 10 times in this thread since it was new. They come and answer other's peoples questions, but when it comes to offgassing no no just deny that and ignore anyone else who asks about how their position is an inconsistent one. They don't wan't to answer this difficult question because they know it could destroy their business since they fucked up their product.

That is true but also if it is true don't you think it got fixed with newer models or new production of same model however they call it in business.

They really don't come here often. I still say you should try whatever info is on that post can't hurt even to get a refund. You have other great options and you shouldn't have to be stressed over a vape to help you or if for recreation to have fun with.

State your needs if you don't know the vapes and a lot of us will help steer you in the right direction or at least we will try.

You would think, but it seems they are incredibly stupid enough to just try and ignore the problem, act like it never happened. Like I said, they just sent me a new model last week and it performs exactly the same as my old shitty one.

Thanks for the offer but like I said earlier, I've tried em all and found what works for me(not this). Im not raging all that bad, I just refuse to be abused by a company this way. And I'm going to call them out so other people don't have to go through the same experience.

Ok I'll be patiently waiting for davinci to come here and give an official response as to why my 2 units do this, even though they seemed to skip over my concerns while addressing others who have posted right after me. It's not a matter of a backlog. They already said on the phone they were talking about giving me a refund. So they are basically admitting that they are not confident enough in their product to send me out another one in hopes that it doesn't offgass. It's because they are aware they have no other product to send me. Im a one in a million complainer. Most people will never check for this problem. Just sweep it under the rug and keep making that cash. Again I'm waiting for an official response from davinci to explain how this is all a big misunderstanding, and that they will have a proper unit to me asap.

If you guys can't take offgassing reports seriously, I don't have much else of a use for this forum. If that's the case then it seems like you guys don't care about the safety of these devices or their users. You have a manufacturer here who has repeated reports of this problem here. I'm not doing this because I'm mad at davinci(tho I am), I'm doing this to either save other people from the experience I've had, or get a proper working unit so I can rave about it. I actually used and like this vaporizer before I learned it might be harmful to me.

I got a black one about a month ago and had no offgassing at all. But if I got two back to back units that did, I would say that's pretty fucked up.

Thank you. Maybe its horrible luck and a new one would work. That still wouldn't bring the issue to my satisfaction. From the second this company learned they may have offgassing units they should be doing everything in their power to track down the source, fix it, and recall all affected devices without having to wait for the user to complain. It's the only way I would run such a business and should be the practice of any manufacturer who claims safe materials. The problem is most people won't ever notice it. I have seen no such effort on part of davinci. Only a denial of the problem, but a willingness to replace any way. To me that screems they are trying to sweep this under the rug.

EDIT: Alright I'll give it a break.

Salutations everyone,

There are people insisting over using the word "RHEOSTAT" while discussing the DaVinci. Have i missed an important post or something?!?

Also, why 4 wires if those are not used for a THERMOSTATIC mechanism instead?...

...since that would be supposed to be a rheostatic device, according to those persons, euh...

Maybe an update is required here!

Howdy. While I don't agree an update is required, I'll be happy to give you my understanding of the beast if you're interested?

Rheostat is not really exactly right, but auto dash panels have made it into a catch all idea for variable power. That's what DV does, varies the power to the heater to control the temperature (two of the wires). The temperature delivered is measured (the other two wires) and used to 'feed back' that information to be used in the controlling of the power....a so called 'closed loop system' (where the output is sampled and used to control the control element, in our case battery power to the heater).

This sort of system differs from you home heater (for instance) in a very important way. It doesn't go up to the magic temperature full blast and shut down when it gets there. Rather it's like cruse control in your car and notes the rate of change and distance to goal. From this it goes into 'proportional control' before it gets there, cutting power back but not to zero. In PV and similar systems this is usuallly done by shifts in on/off cycles, letting the 'thermal mass' smooth out things. When you hit it, it's sensed as a drop in temperature (pretty slight) and power is shifted up like when your car hit a hill on curse control. And important issue can be 'granularity' that is how big are the digital steps I have to work with? Note DV doesn't show every degree? The sensor (probably a thermistor) and circuit that reads it only has a few hundred steps, a well designed system deals with this as well.

This is called "PID", due to the Proportional part, and you Integrate (sum up) the error from ideal then Differentiate the rate of change of that.....aren't you glad you asked?

Anyway, four wires, two to the heater, two to the temperature sensor (which hooks to the computer).

OF

Salutations OF,

Since i've got no good reason to refuse technically sound information on the basis of a guy's name alone please rest assured i've read it all.

Well, i'll be damned if a RHEOSTAT can skip PWM cycles, whatever! So, why not just call it a cat if it looks and behaves like one?...

At least those 4 wires are exactly what i thought they were for, thanks about that (although i'm ready to bet it's a diode junction somehow)!

Rheostats have loss issues. They get warm in your car, in a battery powered gizzie we don't waste steam. Switcher technology can be nearly loss less done right. The trouble is usually on turn on and turn off, not the on or off states.....for those still taking notes.

Prolly not a diode (although that's a good call at lower temps), much too hot for the application. TC would work but thremistor is cheaper....how do you think they feel about cost control?

OF

What do you use, OF? To vape-that is your personal favorite? I need one under $300 and my priorities #1 be helped from this medicine in the same way an edible or my pipe can provide, fick with all my cbd, cbn, thc and all the other magical goodies #2 be nice on my lungs #3 be stealth and portable. Completely appreciate your input, like your thiughts and replies as i have been trying to do my reading and reasearch. I will be a 1 vape user so would like to have everything I need so as to not need to keep waiting for some accessory to come out or with a need to replace parts often.

Ignoring my personal favorites trying to aim at your needs if we're talking herb we need something that can go hot if needed. I guess I'd say MFLB gets the nod from me? It takes some skill go get it to extract just what you're after, but it'll do it and stealth and portable are givens. Learning to hit it also goes a long way to being easy on the toker. Some find the stem makes it easier to deal with, many of us abandoned the stem once we got the hang of it.

Good luck.

OF

It seems that's part of the problem i'm presently observing elsewhere: issues with simple definitions.

In MY book (within a vaporizer forum context) a "rheostat" is a device which isn't supposed to react to temperature variations and hence only 2 wires need to connect the heater assembly. Alternately, a "thermostat" feature wouldn't be possible without the presence of a temperature sensor (to close the control loop) and this would imply 2 more wires for the feed-back part, typically.

I've been reading about induction cookers lately so it sounds somewhat familiar...

Yet that's exactly what has been used in the Vapir NO2: a diode wrapped on top of mica insulation... With what i think could be teflon tape, to prevent flakes from contaminating its air/vapour path, IMO.

It would have been difficult for me to tell how i feel myself about it recently!...

One of the problems with stuff like this is you're pretty much obligated to use the same definitions as everyone else does. In the case or rheostats that would be 'variable power resistor'. Thermostat is a 'temperature dependent switch' (a mechanical part by strict definition). A temperature sensor, OTOH, can be any of several means of sensing temperature either directly or indirectly. Even optically. Sensors need control circuits to work with them in a real system, unlike rheostats or thermostats.

Which brings us to the use of diodes at high temperatures. Since heat that high will kill them the usual scheme is indirect measurements. In the case you cite above, the mica and tape actually form insulation that allows the leads of the device to sink away heat so the junction runs at a fraction of the real temperature. It's calibrated out, of course. Long term, such systems suffer as you might guess. If cost was no object, we'd be going with high end thermocouples.

OF