could someone please take a look at this log

[anthony1]

I have all of a sudden developed a strange behavior, my first battery of the session, about half way through, the motor spools down for a second or two then spools back up, it only happens with the first battery and all subsequent batteries are fine, I tried it with my new battery and it did it too so its doesn't appear to be battery related, this is with my x2, also there is no flashing light on the sk540 to show lvc was hit. can you tell from my log if there is anything that stands out, It was around a third into the flight. thanks
Anthony

[anthony1]

one other thing I also noticed that the headspeed picks up after a loop and stays elevated for a little before settling back down, what should I adjust to stop that behavior
Anthony

[Xrayted]

At about 2.5 minutes into the flight, I see the throttle output go to zero and governor drop the RPM down significantly, then the RPM and throttle coming back up quickly right before TH being activated again. It looks on paper as if you accidentally flipped into TH then quickly back off then on again after realizing there was an issue.

So you were not anywhere near the TH switch when this issue occurred? If not, your throttle output was still going to zero somehow.

I'm also not used to seeing such a low voltage on the power buss rail in this age of "HV" everything. That 5.5V setting just looks weird to me

I thought at first by your description that maybe you were just browning out the electronics and resetting, but it appears stable and no dips down into the range that would cause that.

[anthony1]

the throttle dipped and I auto down then hit throttle hold , then I turned it off and it spooled back up. so far it only happens on the first flight of the day, it must be a barely loose connection, I will have to check all my solder joints I guess. thanks for the quick reply, and yes its a 3s system the x2 is tiny
Anthony

[anthony1]

is it possible it went into failsafe? with an x2 its not really a controlled auto more of a panic and see if it survives, so far I've been lucky
Anthony

[georgi UK]

=] the sensor is going bad or any associated wiring to it?

[georgi UK]

Originally Posted by Xrayted

I'm also not used to seeing such a low voltage on the power buss rail in this age of "HV" everything. That 5.5V setting just looks weird to me

=] that's pretty good compared to one of mine!

[Xrayted]

Originally Posted by georgi UK

=] that's pretty good compared to one of mine!

Ha!

[anthony1]

the sensor is hard wired into the motor wiring ,maybe the solder joint there needs looking at or being that they're cheap should I just change the sensor ?, which one should I get?
Anthony

[georgi UK]

=] Hobbywing tach phase sensor....

[georgi UK]

Originally Posted by Xrayted

Ha!

=] it makes Art cringe when viewing my logs! 3 years later no issues, it's fine, keep flying!!

[anthony1]

I think I have an overheating issue, last week I was on vacation, I flew the x2 everyday with no problems, but first (and only )flight today the motor throttled down about 2 minutes into the flight. the heli was sitting in my car , which is probably around 120-130 degrees for five hours before I flew it and I guess something(esc more than likely) shut down , briefly, well just enough to brake the skids. is this feasible?
Anthony

[georgi UK]

=] ESC temp protections are progressive, in 3 or 4 steps before it shuts down totally, I think my original post #6 is still valid?

[omerco]

Sorry guys I see something different:
Xrayted: put the graphs together its clearer:



The only thing i see happens is the governor output drops to almost 0. Xrayted - you can see the throttle is still valid at that point. TH point is also well seen.

Georgi - the RPM signal looks valid and good, to me. Why do you suspect it?

Anthony - the strange thing is all this happens when you apply sharp positive collective (can you tell it was you?). SK shuts the governor signal there for some reason I cannot explain, yet.

I am seeing some RPM glitches before motor startup, but not during the event - but maybe G is correct and it all starts there.

There is no failsafe event in the log, or even a frame loss.

[anthony1]

well I changed the phase sensor and will give it another try today, and the log from yesterday where it happened again.
Anthony

[anthony1]

tried it this morning with the new sensor and after the first flip it cutout then was fine for the rest of the flight, I did try to upload the flight log but not sure if its the same one as the number is the same, I cant upload it because it has the same number , renaming didn't help either
Anthony

[anthony1]

ok I found something, I double checked my esc settings and it was set to heli mode not external gov mode, i'm hoping that was the problem, what do you think?
Anthony

[omerco]

I still can't see why the gov output was dropped like that, even in heli mode. But it might be an interaction between them which we don't understand. Try it in ext and update.

[georgi UK]

Originally Posted by omerco

Georgi - the RPM signal looks valid and good, to me. Why do you suspect it?

=] Which part of that can't you agree with on my screenshot? input vs output shows exactly what's going on? there is a throttle signal but then the gov quits.

Any reputable ESC will have progressive high temp protection, in steps of +5 deg throttle reduction. In Anthony's case it's a sudden cut, so why not determine the sensor, or its wiring? or the ESC itself?

I don't follow your logic, and perhaps I'm missing something?

@ Anthony, if the same log # is rejected, please change the file ext to HF approved extensions as shown in the upload box.....

[anthony1]

so I changed the cc esc to external gov the esc wouldn't arm , so I went through the procedure for setting up the sk gov ala nick on helifreak and got it working, I will test it at lunch I think and see if it does it again, I'm thinking that this was probably user error , as I seem to remember having difficulties getting the cc esc to talk to the sk gov , will report back later with a positive result , thanks for your input and remember this is just a hobby
Anthony