ok so I'm not one to bash or complain on a fourm or bring up controversy I try to be as levelheaded as possible but right now I am totally frustrated with aubers help they continue to say it's the temperature of the material being placed on the nail and now they go into telling me that the sensor on the coil is not on the tip it is moved back a little bit so it will not give an accurate reading and that is another reason why the temperature is fluctuation so much and also not using their type of nail. They insist the controller is not defective since it brings it to set temperature and holds there. I asked for them to send me a new coil as their website say the coil it warranted for 6 months for defects and they said they could not due that the coils ARENT warranted. They did offer to full refund but then I will be without a controller for how knows how long till I can buy a new one NOT AUBER I guess, but the only other one that even I'm even interested in is the Hex (if only I went with it to begin with
)
If you think the Auber experience has been confusing, wait until you buy as a VERY early adopter from a true start up. I plan to get a HexNail at some point after a couple of software releases and when its documented. At least Auber provides good (the best?) documentation.
I was chatting with
@mutten840 about this and both of us own RDK-300's. Neither of us have touch any PID setting on them at all with the exception of turning off the auto-shut down.
I run mine with an Auber 20mm cylinder coil and it works just fine with factory default settings.
Also, I think Auber is full of it about the SIC. Look, the Auber has two numbers it displays, set point which you enter as the desire "temp" and "actual" temp which is nothing of the sort, well, its the actual temperature somewhere but certainly isn't the temp on the dab surface. Its is merely the temp calculated from the K type thermocouple.
With all of the Ti that we heat up to a stable, heat soaked temp, its very, very hard for me to believe that the thermal coefficient of SiC is somehow to blame here. That would be about the last thing I would suspect. And given
@herbivore21 input on the thermal coefficient of SiC, I believe your insert material cannot be your problem.
As to where the TC is in a hot runner coil...wow, if they say theirs is in the middle of the coil, so be it. But a quick google search returns some interesting articles on the subject, but be a bit cautious because enails are not the only purpose for these devices! LOL Matter of fact, we are probably just a pimple on the ass of the coil industry. To me, the coils we use are very much like the mold coils shown by some of these manf. If you want to educate yourself more on this stuff, peruse some of this data.
This is the general search return
https://www.google.com/search?q=where+is+the+thermocouple+on+a+hot+runner+coil&ie=utf-8&oe=utf-8
THIS is a video of the TC position one a coil very much like what we use.
https://www.dme.net/node/489
Both
@mutten840 and I agreed that if it was one of us, we would return the Auber to factory default settings and really, really, really look at coil fit. Flat coil should cover the area where it is mounted and be flat and physically in contact with the Ti Liger across the coil.
I would also pursue trying another coil and see what happens. I know that's been suggested and I know you don't have anybody in your immediate area, but perhaps someone would lend you an well used D-nail coil (eh,
@mutten840 , do you still have any left around).
You will get a temp drop. I just never noticed but I run my cylinder coiled V2.0 at 590 generally and until you brought this up I can't say I ever looked at temp drop. Yes, there will be a temp drop. You are dropping relatively cool substance on to a hot surface, you have cooling from evaporation (boiling off the concentrate) as well as convective cooling as you suck in ambient air through your Liger and rig. You WILL have a temp drop. How much is acceptable, not sure. As it drops, your Auber (and any PID controller) will kick into gear and push energy into the coil to try to recover set point temp as measured at the TC.
So, let's look at this functionally. Temp drop or not, does the Liger adequately boil off your dab? Mine does when starting at 590 and so I don't really care about a short term temp drop as long as I get what I want. Are you getting good hits from your dabs or not?
Sorry, my friend....but I'm not sure if you will find much more info on Auber PID settings unless we just happen to come across a good control engineer.
Cheers