Question... is there something I can do with my blackbox logs to monitor my voltage? I know that I probably should post this elsewhere but I am kinda desperate and hoping for some help before I go flying tomorrow lol. 

The idea here is if I can get a graph of my voltage across a flight and maybe other electrical values like amperage draw etc during a flight maybe I can troubleshoot my battery issues...

I know that I have somewhat outgrown the beginner question section but I feel this still applies to the beginner seciton level of "I don't know what to do with this" so any help (including the most basic "read this article" answers) will be more help than I could ask for... 

I am preparing to destroy as much as $90 worth of LiPos tomorrow... and if there is any way I can find out what's happening when I kill them it will go a long way towards fixing the best quad I could imagine flying. If I can't fix it then the bumblebee is pretty much going to need a rebuild. 

Key things I am looking for:

Are there any CLI commands I need to issue?
What sort of charts should I be trying to display?

Note: Blackbox logs are something I am still genuinely inexperienced with so I'll be happy for any help I can get

I think it's not possible yet. Not sure if i seen a feature request on github for this recently though... so please anybody correct me if i'm wrong, i wouldn't like to be the guy who's spreading false information.

My fault (see unseen's post after this), i think what i read was about the fc power voltage (5V) which can't be logged separately.

If you have the VBAT sensor wired up on your quad, it will be logged without you having to do anything. The same applies if you have a current sensor.

You can plot the voltage and current along with your throttle and see how the battery reacts in a punch-out and in normal flight. This will show you how low the battery voltage is dropping under load and give you some idea of how hard you are pushing it. Having a current sensor really helps to give you the whole picture.

So I found it... It seems on a punch out on a fresh battery I was pulling the voltage all the way down to 13.4. That seems a bit excessive, and I didn't know because I am not using an OSD on this one and I didn't hook up smart-port.

The craft display shows motor 2 at full thrust, motor 4 at about 90% and the other two at about 80%.

Any thoughts?

(03-Jun-2017, 10:28 AM)Carl.Vegas Wrote: The craft display shows motor 2 at full thrust, motor 4 at about 90% and the other two at about 80%.

Any thoughts?

That could be pretty normal if it was for example LOS straight up punchout with wind from rear left side (i.e. motor #2 would get worst airflow of all 4)... however if those numbers stay the same no matter the orientation, maybe check and re-do the soldering of motor/esc #2?

If it was a bad motor/esc the difference would probably be bigger than 20%, i don't think that's the case.

BTW sorry for my first wrong answer, i really mixed it up, and personally didn't have a quad yet that has both vbat & logging capability. And thanks to unseen for clarifying.

I dont think its specifically motor number 2. Those are some of my best joints on that one too. I mention it mostly to specify the amount of drain being put on the battery. 13.2v on a freshly charged battery seems like a lot of draw. The diatone comes down to the high 14s at the lowest on a fresh battery.

Im going to keep flying though and review blackbox logs later.

(03-Jun-2017, 04:40 PM)Carl.Vegas Wrote: I dont think its specifically motor number 2. Those are some of my best joints on that one too. I mention it mostly to specify the amount of drain being put on the battery. 13.2v on a freshly charged battery seems like a lot of draw. The diatone comes down to the high 14s at the lowest on a fresh battery.

Im going to keep flying though and review blackbox logs later.

That's far from an excessive voltage drop.

If I do a full throttle punch out on my SwiftBlade build with the 2306 motors and 6040 props, the battery drops to 11.5 volts or 2.88 per cell.

That is truly excessive!

(03-Jun-2017, 05:09 PM)unseen Wrote: That's far from an excessive voltage drop.

If I do a full throttle punch out on my SwiftBlade build with the 2306 motors and 6040 props, the battery drops to 11.5 volts or 2.88 per cell.

That is truly excessive!

Gotcha. Thats what I needed to know.

Illl post some updates in the other thread

Btw went through your build thread again, not sure if you fly the 2blade or the tri's now... Are the triblades also 45 pitch? Also prop weight alone costs quite some power.

If you really feel it's too much, maybe experiment with different props too?

Trying dual blades next.

Carl let me know how the dual blades work out. I have tried a few different ones and they just dont feel stable as I'd like.

I like the duals on the Vortex (which is interesting since it's the heaviest one)... I am not sure what it is about it but it flys a little smoother on them.

The duals are OKish on the Diatone. I don't know if it's helped much or if I am just getting used to some of the characteristics.

On the bumblebee... no dice... Cyclone 2s are the best feel so far. Also I got some mild puffing even with the duals. I haven't dug up the blackbox logs yet. I probably should do that soon as I am still curious.