ohm safety
- Thread starter Marvin & Sennie
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5.5v is the max rated voltage & 15W for the VVG's driver. I haven't tested the max limits of the driver yet but with a 1.8 ohm coil that's just beyond the max ratings of the driver with the wheel turned all the way up & cut out but mine doesn't. To get full use of the voltage range the lowest resistance should be 2.0-2.1 ohm. I had a 1.76 ohm coil on mine but mine didn't cut out with the wheel maxed out.
I guess I'm not understanding the whole VV thing or I'm just too used to LR/SLR. When I turn the voltage up the vape gets way too hot & my juice tastes burnt. I like warm vapes but this is a difftferent kind of hot. I know it defeats the purpose of a VV but I run a lower than recommended resistance coil on mine with the wheel not turned up too much. I enjoy it more than high voltage. Is there something I'm missing or doing wrong? I haven't messed with it a whole lot, I just vape it like this.
Well, I took the 1.8 coil out and made a new one that came out at 2.0~2.1. Still, with the wheel all the way up it isn't hot at all. However, it is producing a decent amt of vapor but it isn't intense by any means and no burnt taste. I'm gonna have to send it in for a check up.
There may not be anything wrong with it but I really don't have much experience with it to make a valid assumption. Hopefully others can chime in before having to make a worthless trip to Robert if that's the case. It could be your air hole? A bigger air hole will bring the heat down. The hole air hole on my VVG is smaller than any of my other atties. Only cause I don't want to risk messing up my Ti cap. Sure I can make more & need to but for now it will stay as is.
It's the stock air hole on the RM2. Definitely not the air hole. I really don't think this thing is pushing out 5.5 volts when the wheel is all the way open. It feels the same weather the wheel is half way or all the way. Judging from past experience with other VV mods, I was never able to (nor needed to) turn them up much past 4.4v with out it being uncomfortable. Usually it was somewhere between 3.7v and 4.1v. Like Navy says, it should be frying something with the wheel all the way open.
Are you saying the wheel has an effect for the bottom half of it's operational window? Or have you assessed that?
Let's troubleshoot this the way they choose Hungarian color names. . . .
One thing that would cause this is the mod thinks the resistance is lower than it is. What would cause this to happen?
Overcharged batteries?
A little short action?
One thing that would cause this is the mod thinks the resistance is lower than it is. What would cause this to happen?
Overcharged batteries?
A little short action?
Easy way to check, measure the voltage at the atty posts with or without a coil installed. The driver has open circuit (no load) protection so it's safe, just be careful not to short your MM leads. Mine has a range of 3.20v - 5.42v.
Yes, it does have an effect for the bottom half. It gets progressively hotter as expected but once you get to about the half way mark, there isn't much (if any) difference in power increase between it being 1/2, 3/4 or full open. In other words, it seem to peak just below the half way mark and then stays level to all the way open. I think it should be like a molten inferno as Navy suggests at full open or even at 3/4....no? It just delivers a rather tame vape anywhere between half and full open.
Batteries are at 4.2 just off the charger. It doesn't act like a short or at least I don't see any sign of it. The coils all glow evenly as they should on a micro from middle to outside.
OK, so it has a 15 watt limit. 1.8Ω @ 15 watts is 5.1 volts. So it would stop getting hotter at that point in the "turn of the wheel"
And, it would take a 1.3Ω coil to stop it increasing power at about 4.4 v (1/2 turn of the wheel)
(like I said, I would have just PMed Rob)
(like I said, I would have just PMed Rob)
I replaced the 1.8 with a 2.0~2.1 and there wasn't much difference. But shouldn't it be uncomfortable to vape at 15 watts on a VV device? I know that on a vamo for instance with a 1.8 coil I start getting a burnt taste at watt settings above 9 watts.
Are you saying that if I have a higher ohm coil, say 2.8, I could turn the wheel up higher and it would get hotter because it hasn't reached it's limit?
I know that if I put a vivi nova with a 2.8 coil on one of my other VV mods and crank it up much past 4.1v, it gets waaay too hot to vape. Is that not the case with a VV grand with a RM2?
I think I just don't understand how to use a VV device.
I just put my 1.76 ohm coil back on, with the wheel turned up all the way I get 5.40V. That's 16.5W. But there's other factors like driver efficiency, resistance of the body/connections, yada yada. Man this is all reminding me of flashlight stuff. But what we don't know is if the driver is actually delivering 3A to get 16.5W without measuring inline between the driver ouput to the coil.
If you say you don't notice a difference from the halfway mark & up then either your batteries aren't performing under load or the driver is not delivery sufficient power. I assume you are using IMRs? You should really take some voltage measurements at the half way mark (or where you say there's no more noticeable difference) & up. This will quickly give you an indication if anything is wrong. Won't tell you all but it will tell you something. Sounds like you do have a means of measuring voltage.
If you say you don't notice a difference from the halfway mark & up then either your batteries aren't performing under load or the driver is not delivery sufficient power. I assume you are using IMRs? You should really take some voltage measurements at the half way mark (or where you say there's no more noticeable difference) & up. This will quickly give you an indication if anything is wrong. Won't tell you all but it will tell you something. Sounds like you do have a means of measuring voltage.
I replaced the 1.8 with a 2.0~2.1 and there wasn't much difference. But shouldn't it be uncomfortable to vape at 15 watts on a VV device? I know that on a vamo for instance with a 1.8 coil I start getting a burnt taste at watt settings above 9 watts.
Are you saying that if I have a higher ohm coil, say 2.8, I could turn the wheel up higher and it would get hotter because it hasn't reached it's limit?
I know that if I put a vivi nova with a 2.8 coil on one of my other VV mods and crank it up much past 4.1v, it gets waaay too hot to vape. Is that not the case with a VV grand with a RM2?
I think I just don't understand how to use a VV device.
That all depends, what size wire are you using? Higher guage yes & lower guage not so much. The lowest guage I use is 30 on the VVG.
I replaced the 1.8 with a 2.0~2.1 and there wasn't much difference. But shouldn't it be uncomfortable to vape at 15 watts on a VV device? I know that on a vamo for instance with a 1.8 coil I start getting a burnt taste at watt settings above 9 watts.
Are you saying that if I have a higher ohm coil, say 2.8, I could turn the wheel up higher and it would get hotter because it hasn't reached it's limit?
I know that if I put a vivi nova with a 2.8 coil on one of my other VV mods and crank it up much past 4.1v, it gets waaay too hot to vape. Is that not the case with a VV grand with a RM2?
I think I just don't understand how to use a VV device.
oh, i was just thinking out loud. Ignore me.
I sent a message to the reofather. In the mean time, I'm gonna go vape on my mech reos until I pass out.
I have a good Klein multimeter but other than checking batteries and ohms I don't know how to use it. Do you just put the leads on the positive and negative posts on the atty and hold the fire button. What should the MM be set on...V?
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