Davinci by Karma

[Dreamerr]

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.

 

[ej2389]

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.

 

[momofthegoons]

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.

Okay..... I think you have voiced your opinion of your experiences with this company at length. You are now treading dangerously close to breaking this rule:

Don’t attack products or companies. You can post your opinion, and you can criticize, but posts written to offend are not allowed.

Saying that they are selling you a "fucked up product" takes this over the line. You may also want to remember that this is the holiday season and many companies are backlogged. Any further comments like this from you will earn you a warning point.

 

[ej2389]

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.

 

[GreenRoom]

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.

 

[ej2389]

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.

 

[momofthegoons]

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.

ej2389, I'm going to cut you some slack here since you are fairly new to the forum. But if you had done some reading around the forum, you would know that we take the safety of vapes very seriously here. Thank you for backing off the bashing of DaVinci. I hope your issues are resolved. But to say this forum doesn't take these things seriously is completely false.

 

[Egzoset]

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!

 

[OF]

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

 

[Egzoset]

Salutations OF,

I'll be happy to give you my understanding of the beast if you're interested?

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.

...aren't you glad you asked?

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?...

...four wires, two to the heater, two to the temperature sensor...

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)!

 

[OF]

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

 

[Medigan]

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.

 

[OF]

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.

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

 

[Egzoset]

Rheostats... ...in your car...

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.

...for those still taking notes.

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

Prolly not a diode... ...much too hot for the application.

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.

...how do you think they feel about cost control?

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

 

[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.



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.

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

 

[Egzoset]

Sensors need control circuits to work with them in a real system, unlike rheostats or thermostats.

Allow me digress about this, "thermo" means heat and "stat" means stable (KISS phylosophy)...

ThermoStat = Stabilized Temperature​

Though i can think of a thermostatic system with no sensor at all, as a matter of fact!

Anyway we seem to refer to some common language (for example, thermal mass behaving as a low-pass filter within a closed loop system), whatever. So, briefly put i didn't think it was fair to compare the DaVinci to a "Rheostat" (and i still don't!!) - which by the way says absolutely nothing about what side i'm on.

You've confirmed what a photograph already proved: there's a sensor and it's there to implement thermostatic control, that's it.

​

A cat IS a cat.

Your input was appreciated, in any case! So, thanks again. Good day, have fun!!

 

[Dreamerr]

As always OF you gave me a headache but an interesting read.

 

[Egzoset]

As always OF you gave me a headache but an interesting read.

Which means the DaVinci is a rheostatic type of vaporizer, i guess.

 

[OF]

As always OF you gave me a headache but an interesting read.

Great to hear Lady. Keeping you amused is important to me you know.......

Which means the DaVinci is a rheostatic type of vaporizer, i guess.

By all means do keep guessing?

OF

 

[djonkoman]

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.

well, I didn't have so much reason to want there to be no offgassing, except that it's a cool gadget and fits a niche. but I didn't pay anything for it(since I won it), and already had both a home and portable vaporizer when I received it.
I had read trough this thread and saw the reports of ofgassing, but I also saw people that had no trouble with it, so I fully charged it, and first put it on without loading anything for a good test.
after it was on for a while there was indeed a mystery vapor(not extremely much, also it was only visible with the lid closed)
during the 2nd or 3rd cycle it was greatly diminished, I think it was gone completely but it could've that there was some remaining, but if there was it was way less as at first.

I didn't notice any bad taste after that, but my sense of smell isn't that good and often I don't taste the weed I'm vaping at all. so a few days after I got it(and barely used it, since at home I have my UD) I went to the coffeeshop to give it a proper test, and none of the friends that tried it noticed a bad taste. on later occasions where others used it I also always got positive remarks(and the neutral 'it looks like a walkytalky')

so I'm confident using it, and it fits a perfect niche as portable that I can also easily pass to others without learning them a technique.

 

[GreenRoom]

What color is the unit? ej2389's two units that were offgassing were white and gray. Mine's black with no offgassing whatsoever. If they came up with a fix, didn't update the stock, and the black is more popular, Karma might have colored versions without the fix that they're selling. I don't know, it's just a guess.

 

[djonkoman]

the one I got is black too. but there are things like that mentioned about certain colors elsewhere in this thread too, I think it's unlikely that it's really related to color.

 

[ej2389]

What color is the unit? ej2389's two units that were offgassing were white and gray. Mine's black with no offgassing whatsoever. If they came up with a fix, didn't update the stock, and the black is more popular, Karma might have colored versions without the fix that they're selling. I don't know, it's just a guess.

Don't you see that as a problem? Knowingly selling offgassing units? Despicable if that's the case.

djonkoman: Just because you can't taste a toxin doesn't mean it isn't there. I admit I hit my davinci even after I saw the offgassing not going away because I wanted to believe that it would not be that harmful to me and go away. Well it didn't go away and I'm realizing how stupid it is to keep inhaling something that could be plastic fumes.

 

[OF]

djonkoman: Just because you can't taste a toxin doesn't mean it isn't there.

Can you name that "toxin"? Be kind of strange to find a toxic in a food grade silicone you'd think.....

We've been through this all before. Deja vu all over again?

OF

 

[ej2389]

Can you name that "toxin"? Be kind of strange to find a toxic in a food grade silicone you'd think.....

We've been through this all before. Deja vu all over again?

OF

Calm down I'm not saying it is for sure toxic. I'm freaked out by the possibility. I kind of got side tracked in my last post. The point of it was supposed to be that I didn't taste anything either, but I'm sure there was something there besides the herb.