@fernand, nice to see you enjoying your new QQ so much. You're all over the place here, idk if I can keep up with your low-temp energy but I'll try for a minute
Settings as verified with reasonably well calibrated IR thermometer
TCR M3 = 230
Ramp up watts: 25
Set Target temp: 320, 330.
Measured temps in cup: 320-365 deg F.
Reporting today's hotter settings experiments on my
iLeaf Pico
Resistance, cold, reads 0.25 Ohm
Set TCR M3 = 230
Set Ramp up wattage 30W
Set target temp 360
10 Sec Cycles to stable temp 2-3
Cup temp ~ 350-370 with peaks < 400 Deg F.
By the end of the second timeout we're reaching
operating temp and start slowly inhaling.
Output: Two non-hurty, tasty and potent tokes
that don't look like Volkswagen diesel smoke.
Not trying to
convert anyone, mind you,
but 451 deg is veg combustion. By then the
substances of interest have long boiled off.
With those hot & hurty nails, or high settings,
nobody's really
vaporizing much of
anything.
It's more like a BBQ flash fire in a garbage can.
Stuff's decomposing. The actives that do survive
the storm are a
fraction of what was available.
There sure wouldn't be 10 mg of that THC left!
So people use much bigger dabs, raise the temp,
and even less of that ever sees the light of brain.
What we're calling Low Temp Dabbing now is
the only way to actually vaporize and inhale
most of a concentrate dab. That's why those
nanodabs aren't as tiny as they might seem.
Good work, you'll find that on mods with a 1-999 TCR range, #s in the range of 220-240 will allow the ceramic rods to heat the apparent surface temp of the quartz cup to be approximately the same temp as what you see on the screen, after a 15-30 second warm up period, depending on your settings. It can even hold that heat for a while, with the button being pressed down continuously, but you'll find the cup will eventually overheat if you have the button held down continuously for a prolonged time, even with TC operation working well.
I'm sure you set your IR themometer to 0.93 to get the best reading, far from the 0.65 you probably had it set to when you last looked at your ceramic donuts or crucibles? That might just be close enough to the default 0.95 to get a usable reading.
Of course you know the IR gun is a 'rough' measurement, but better than nothing at least. To be truly precise and granular, you need to get a high-resolution, hi-heat FLIR. Check out some of
@FMSQ's
old posts to see some cool pics.
Also, I must say, it seems that you are using MUCH lower temps than most people prefer. If I was trying to vape that low temp on my QQ, I would expect only flavor and little clouds or satisfaction at all.
Your mindfulness of how cannabinoids and terpenoids can thermally break down and how delicate and precious they are is well taken, but I think you're overlooking a key point of thizzics in your quest for vape precision:
the thermal conductivity of quartz (or various materials)
The thermal conductivity of quartz is MUCH lower than alumina ceramic!
Looking through that article or other data, trying to see what kind of quartz is in our QQ, what kind of alumina is in our donuts, trying to narrow it down to see the exact conductivity of the materials seems moot, because all the quartz are pretty low, the alumina much higher, and all my anecdotal experience seems to match that!
I first tried to 'tune' my early QQs to heat oil to the 400's F or lower, by tuning cup temps to be in the 400's, but that never satisfied me or made much vapor until I bumped the cup temps to over 500F. Just cuz the cup is 520F doesn't mean the oil instantly reaches anywhere near that temp, however, especially with airflow, movement, swirling, etc. and poor thermal conductivity of quartz.
Contrast to my trusty V3 donuts, and there is a much smaller temp differential between the donut surface temp and the oil temp. Oil touching an alumina donut feels like it may be only 5-15F cooler than the hot donut itself. Oil swirling on the quartz cup
feels like its' vapor is at least 60-100F cooler than the quartz crucible heating it.
We have to get a reading with a thermocouple coated in hot molten oil to really know for sure.
So if you're heating your cup to a mere 350-360F, you may not even be heating your oil enough to even vape much thc, but mostly just to break it down and loosen up some terps into your air stream?
But you've always been a low-temp guy, even with the V2.5 / V3, and that's one of the best things about TC mods and compatible attys, their ability to adapt to a variety of user preferences.
One of the important details, and there are sssSO many, is not to ramp up
so fast you decouple from the load, 'cause then 1) the load isn't keeping up
with the heaters, i.e. the temp in the cup lags, and 2) you're hunting and
overshooting enough to do damage. At 50W it's way too fast for me. At 25W
so far she's like greasing onto the runway, but we'll see.
Personally I like this as a muzzle-loader. Same as my ceramic cups. And yes,
you're right, the thing that the ceramic cups require is air coming in from above.
The Quartz Quest solves so many issues.
GREAT WORK, Matt
@divinetribe !!!
OK,
must clean up after every load. Swabbing the quartz is easier than
removing and torching a removable cup. Even the nail nubies are learning to
keep their torched quartz sparkly. So the QQ looks absolutely
great to me.
If oil starts building up, it gets into contacts, and the whole stable temp control
is headed off the tracks. Matt tells it like it is:
wipe after you're done.
And if y'all weren't so set on overloading and then blowing 80% of the vapor
out into the Mother Primeval, things would go smoother ;-) Just sayin'
So tell me about this
AF. I took a multi-year break, and the gear I had, the
eVic-VTC-Mini (that has taken
so many crashes and surgeries, not covered
by AppleCare), and the iStick Pico, still working fine for nicotine. They're
also looking fine for 710 duty. Anything come out that's much better?
Or is there new firmware that offers more fail-safes, or a smarter PID or what?
I'd tried an update on one of them, it hid the resistance reading, and then it
took some work to revert to 1.0 ;-)
Seems like you're rapidly getting a feel for how the heating on the QQ works in the real world. It's quite separated from the little computerized brains of our mods since they can't really know what the actual temp of the quartz cup is at. We aren't "controlling the resistance Ω" of our quartz cups.
But we can still control the heat pretty well with judgement, technique, and good settings on our mods.
Since you already own the evics and picos that support it, I see no reason not to just
go ahead and install AF already. Unless you're strictly a mac guy and don't feel like hacking with some work-around interface to install it?
The TC implementation is far superior over stock, and the degree of control over so many parameters and options over your mod are much appreciated by someone who likes control over small details like you. Yes, you get PI control (no D) but it works fine without the D. Myevic is still there for your VTC mini if you must have "the D"
@fernand I have pretty consistent rips using Replay Mode on a DNA 75c w/ locked resistance. Definitely suggest trying out a DNA chip w/ Replay Mode if you like extra-low temp. Expensive though, so see if you can find someone to let you try it.
I haven't tried one of those chips yet, but I'm well aware of the superior hardware components and DC-DC signal on the DNA mods. If you sample the opinion on the AF forums (a subjective group, yes) you'll see mixed opinions with many leaning towards the superior software of AF being able to match or even exceed the functionality of new DNA mods even?
I'd have to really put the time & effort into the DNA myself to find out, but I see little incentive so far when I can usually buy 2-4 AF-compatible mods of similar size / power specs at the cost of buying a single DNA-chipped mod.
And the cheap AF mods work fine for me.
I've been hearing about this replay mode though, how much better could that really be for the QQ over a well-set TCR or TFR mode?
Like if you just "hold down the button" on replay mode, for say, even 20-30 seconds, even after rods & cup are at temp, it will hold steady cup temps? Even with or without airflow? Unless the new software is doing something completely new I can't imagine, I would expect cup temps on the quartz to continue to rise, even if very slowly, if power continues to be applied in replay mode, or any mode.
With plain TCR mode on my wismec RX gen3 dual (current QQ mod) I can hold the power down for up to 30 seconds or more (initially at the start of a load) with no over-heating, but eventually I must left off. If replay mode is simply holding down a target coil Ω of your choosing without telling you a temperature or anything, and trying to maintain that, the cup can still get hotter, right?
Also, do DNA mods have PI / PID control? I've been trying to figure that out for a long time, can't seem to find that
thanks (not that I've found QQ to benefit much from PID)