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Rescue issues on Kraken 700

geschrieben von azztek 
Rescue issues on Kraken 700
15.02.2023 18:26:33
Hey, my 1st post here trying to get some advices. Long story short, I have one Vbar Neo non Vlink with pro+rescue on it, which I bought new from Lindinger back in 2019. I had it installed on a Goblin 700 Competition and it has always behaved as it should, and rescue has always been almost flawless, always leveling the heli and shooting it straight up, even though the logs had plenty of extreme vibrations warnings. Also, believe it or not, the heli has never been in a crash ever since it had the Neo on it, well that's because I saved it at least on 3 occasions with rescue.
So here is my problem. I retired the Competition and got a Goblin Kraken 700, very nice machine, smoothlike a clock, Vbar also seems to work better on it, except the rescue, which is kind of horror. Apparently, rescue works just fine if I test it right after takeoff or without doing 3d stuff, but if I hit rescue 2 or 3 minutes into the flight and after some tictocs and so on the rescue becomes really really hazardous. First time it did me tricks it angled the heli and shoot it horizontally, almost downwards. Ok, I documented the situation and found out SAB did a version 4 fbl dampened support which I then got and installed. I did some tests with the more rigid dampers (65 shore) and that brass weight mounted hoping the get a more reliable rescue, and it seems that it is indeed better, but it still did something very strange on one occasion: upon hitting rescue it got the heli back into almost level hovering and started to lift it up (a bit sideways), but in very aggressive manner, I mean the heli almost became like a rocket and I wasn't able to stop it from gaining height, which I know it doesn't usually happen, because i know I can override the rescue routine if I want. But for some reason it seems that now vbar on this Kraken seems to occasionally refuse my inputs If I try to stop rescue before timing out. Another thing that is now manifesting is that if I hit rescue on the bench it would lift the swash a bit and then quickly tilt it backwards, and I've never seen my unit doing this previously, on the bench it would always just level the swash, lift it then slowly leveling it. The rescue seems to still know the horizontal in flight, but again, it is not realiable beyond hovering and calm flights and frankly it scares me.
Next I am going to test the 65 shore dampers without the brass weight, then the softer ones.
I would try the standard initialisation method but this option seems to lack completely from tha Vbar Java pc app. What am I missing?
Also, I would like to know, is there any explainable scenario in which the Vbar would completely ignore my inputs and continue the rescue routine until it times out?



2 mal bearbeitet. Zuletzt am 15.02.2023 20:15 von azztek.
Re: Rescue issues on Kraken 700
15.02.2023 19:12:01
Hi azztec,

just a (may be) stupid question: Did you calibrate your horizon of the VBar Neo after putting it into the new heli?

Seamless rescues in future flights, best regards,
Werner
Re: Rescue issues on Kraken 700
15.02.2023 20:21:44
Hi, thanks for replying, actually I never messed with the horizon calibration in my Vbar, they say it's factory calibrated and usually no need to calibrate. Will try asap.



1 mal bearbeitet. Zuletzt am 15.02.2023 20:24 von azztek.
RV
Re: Rescue issues on Kraken 700
15.02.2023 21:34:53
Could you please attach the log file (get all entries) from the PC software when the NEO is connected?

regards (EN) / Gruss (DE)

Rainer Vetter

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Posting and answering - please use a PC and a standard keyboard. Answer all questions fully, take the needed time, don't forget probably requested attachments.

Für Posts und Antworten bitte einen PC und eine richtige Taststaur benutzen sowie alle Fragen vollständig abarbeiten. Nehmt Euch Zeit, beantwortet Rückfragen in Ruhe und vollständig.
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Re: Rescue issues on Kraken 700
15.02.2023 22:08:55
Here is my latest log, unfortunately it only contains a flight or two in the first half, the last one should be from my last flight last week and it contains no messages about activating rescue, the rest of the log is mostly me handling the heli on the bench, taking the Neo out from the heli and handling it at the computer.
Never had any errors about the sensors on this unit, I just noticed tonight an Aileron Sensor Value out of Range warning, but I think it was me handling the unit in my hands. Further on the log you will notice I tried, as per above user suggestion to do the horizontal calibration, which ended with an error. I restarted the unit, tried calibrating again and it ended succesfully. Next I tried the unit on the model, but upon hitting rescue again the swash was still tilting abnormally backwards and to the right. What I did next was to disable "Precision calibration", then I did another horizontal calibration and on the next test on the heli rescue behaved normally, upping the swash perfectly and slowly returning it back. Returned to Vstabi software, re-enabled precision calibration, just to see if rescue goes back to tilted swash but no, now it works ok. Is it possible that my sensor was stuck without the logs showing it's stuck, or without seeing the swash dance at startup?

Attached below is the log file, please change .pdf extension back to .log

Quote:
Wed Feb 15 21:37:05 EET 2023
Serial: 20027667
Firmware: 6.4
Patchlevel: 54
---- start ----
Info 0:10 Raised Vibration Level
Info 0:12 Rescue has been activated
Info 0:13 Rescue has been completed
Warn 0:13 Rescue has been oversteered by the Pilot
Critical 0:19 Extreme Vibration Level
Critical 0:28 Extreme Vibration Level
Warn 0:37 High Vibration Level
Warn 0:46 High Vibration Level
Warn 0:56 High Vibration Level
Info 1:05 Raised Vibration Level
Warn 1:14 High Vibration Level
Critical 1:23 Extreme Vibration Level
Warn 1:32 High Vibration Level
Info 1:32 Rescue has been activated
Info 1:34 Rescue has been completed
Warn 1:34 Rescue has been oversteered by the Pilot
Info 1:36 Rescue has been activated
Info 1:38 Rescue has been completed
Warn 1:38 Rescue has been oversteered by the Pilot
Info 1:39 Rescue has been activated
Info 1:40 Rescue has been completed
Warn 1:40 Rescue has been oversteered by the Pilot
Critical 1:41 Extreme Vibration Level
Info 1:43 Rescue has been activated
Info 1:44 Rescue has been completed
Warn 1:44 Rescue has been oversteered by the Pilot
Info 1:48 Rescue has been activated
Info 1:50 Rescue has been completed
Warn 1:50 Rescue has been oversteered by the Pilot
Critical 1:51 Extreme Vibration Level
Info 1:59 Rescue has been activated
Critical 2:00 Extreme Vibration Level
Info 2:01 Rescue has been completed
Warn 2:01 Rescue has been oversteered by the Pilot
Warn 2:09 High Vibration Level
Info 2:10 Rescue has been activated
Info 2:11 Rescue has been completed
Warn 2:11 Rescue has been oversteered by the Pilot
Info 2:17 Rescue has been activated
Critical 2:18 Extreme Vibration Level
Info 2:18 Rescue has been completed
Warn 2:18 Rescue has been oversteered by the Pilot
Info 2:19 Rescue has been activated
Info 2:22 Rescue has been completed
Warn 2:22 Rescue has been oversteered by the Pilot
Warn 2:27 High Vibration Level
Warn 2:37 High Vibration Level
Info 2:45 Rescue has been activated
Critical 2:46 Extreme Vibration Level
Info 2:46 Rescue has been completed
Warn 2:46 Rescue has been oversteered by the Pilot
Info 2:47 Rescue has been activated
Info 2:48 Rescue has been completed
Warn 2:48 Rescue has been oversteered by the Pilot
Critical 2:55 Extreme Vibration Level
Critical 3:04 Extreme Vibration Level
Info 3:08 Rescue has been activated
Info 3:09 Rescue has been completed
Warn 3:09 Rescue has been oversteered by the Pilot
Warn 3:13 High Vibration Level
Info 3:22 Raised Vibration Level
Info 3:28 Motor Switch operated to OFF
Info 3:32 Raised Vibration Level
OK 3:42 Good Health Message (10sec)
OK 3:52 Good Health Message (10sec)
OK 4:02 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout
OK 0:10 Good Health Message (10sec)
OK 0:20 Good Health Message (10sec)
OK 0:30 Good Health Message (10sec)
OK 0:40 Good Health Message (10sec)
OK 0:50 Good Health Message (10sec)
OK 1:00 Good Health Message (10sec)
OK 1:10 Good Health Message (10sec)
OK 1:20 Good Health Message (10sec)
OK 1:30 Good Health Message (10sec)
OK 1:40 Good Health Message (10sec)
OK 1:50 Good Health Message (10sec)
OK 2:00 Good Health Message (10sec)
OK 2:10 Good Health Message (10sec)
OK 2:20 Good Health Message (10sec)
OK 2:30 Good Health Message (10sec)
OK 2:40 Good Health Message (10sec)
OK 2:50 Good Health Message (10sec)
OK 3:00 Good Health Message (10sec)
OK 3:10 Good Health Message (10sec)
OK 3:20 Good Health Message (10sec)
OK 3:30 Good Health Message (10sec)
OK 3:40 Good Health Message (10sec)
OK 3:50 Good Health Message (10sec)
OK 4:00 Good Health Message (10sec)
OK 4:10 Good Health Message (10sec)
OK 4:20 Good Health Message (10sec)
OK 4:30 Good Health Message (10sec)
OK 4:40 Good Health Message (10sec)
OK 4:50 Good Health Message (10sec)
OK 5:00 Good Health Message (10sec)
Info 5:05 Calibration Finished
Info 5:05 Bank 1 Loaded
Info 5:05 Motor Switch operated to OFF
OK 5:15 Good Health Message (10sec)
Info 5:24 Bank 2 Loaded
Info 5:32 Bank 3 Loaded
OK 5:42 Good Health Message (10sec)
OK 5:52 Good Health Message (10sec)
OK 6:02 Good Health Message (10sec)
Info 6:08 Bank 1 Loaded
Info 6:08 Bank 2 Loaded
Info 6:11 Bank 2 Loaded
Info 6:11 Bank 3 Loaded
Info 6:12 Bank 1 Loaded
Info 6:12 Bank 2 Loaded
Info 6:13 Bank 2 Loaded
Info 6:13 Bank 3 Loaded
Info 6:14 Bank 1 Loaded
Info 6:14 Bank 2 Loaded
Info 6:15 Bank 2 Loaded
Info 6:15 Bank 3 Loaded
OK 6:25 Good Health Message (10sec)
OK 6:35 Good Health Message (10sec)
OK 6:45 Good Health Message (10sec)
OK 6:55 Good Health Message (10sec)
OK 7:05 Good Health Message (10sec)
OK 7:15 Good Health Message (10sec)
OK 7:25 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 1 Loaded

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to OFF

Info 0:00 Motor Switch operated to Idle bailout
Info 0:05 Calibration Finished
OK 0:15 Good Health Message (10sec)
Warn 0:19 The Cyclic Ring is active
Warn 0:22 The Cyclic Ring is active
Warn 0:23 The Cyclic Ring is active
OK 0:33 Good Health Message (10sec)
OK 0:43 Good Health Message (10sec)
OK 0:53 Good Health Message (10sec)
Info 1:02 Rescue has been activated
Info 1:03 Rescue has been completed
OK 1:13 Good Health Message (10sec)
OK 1:23 Good Health Message (10sec)
OK 1:33 Good Health Message (10sec)
OK 1:43 Good Health Message (10sec)
OK 1:53 Good Health Message (10sec)
OK 2:03 Good Health Message (10sec)
OK 2:13 Good Health Message (10sec)
OK 2:23 Good Health Message (10sec)
OK 2:33 Good Health Message (10sec)
OK 2:43 Good Health Message (10sec)
OK 2:53 Good Health Message (10sec)
OK 3:03 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout
Info 0:01 Bank 1 Loaded
Info 0:01 Motor Switch operated to OFF
Info 0:05 Calibration Finished
OK 0:15 Good Health Message (10sec)
OK 0:25 Good Health Message (10sec)
OK 0:35 Good Health Message (10sec)
OK 0:45 Good Health Message (10sec)
OK 0:55 Good Health Message (10sec)
Info 1:01 Rescue has been activated
Info 1:02 Rescue has been completed
Warn 1:02 Rescue has been oversteered by the Pilot
Info 1:05 Motor Switch operated to ON
OK 1:15 Good Health Message (10sec)
Info 1:18 Raised Vibration Level
OK 1:28 Good Health Message (10sec)
Info 1:37 Raised Vibration Level
Info 1:46 Raised Vibration Level
OK 1:56 Good Health Message (10sec)
Info 2:04 Raised Vibration Level
Warn 2:13 High Vibration Level
Warn 2:23 High Vibration Level
Warn 2:32 High Vibration Level
Warn 2:41 High Vibration Level
Info 2:50 Raised Vibration Level
Info 2:59 Raised Vibration Level
Critical 3:08 Extreme Vibration Level
Critical 3:18 Extreme Vibration Level
Info 3:27 Raised Vibration Level
Info 3:36 Raised Vibration Level
Info 3:45 Raised Vibration Level
Info 3:54 Raised Vibration Level
Info 4:04 Raised Vibration Level
Warn 4:13 High Vibration Level
Warn 4:22 High Vibration Level
Warn 4:31 High Vibration Level
Info 4:40 Raised Vibration Level
OK 4:50 Good Health Message (10sec)
Warn 4:59 High Vibration Level
OK 5:09 Good Health Message (10sec)
OK 5:19 Good Health Message (10sec)
OK 5:29 Good Health Message (10sec)
OK 5:39 Good Health Message (10sec)
OK 5:49 Good Health Message (10sec)
OK 5:59 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout
OK 0:10 Good Health Message (10sec)
OK 0:20 Good Health Message (10sec)
OK 0:30 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 1 Loaded

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to OFF

Info 0:00 Motor Switch operated to Idle bailout
Info 0:05 Calibration Finished
Info 0:13 Rescue has been activated
Info 0:14 Rescue has been completed
Info 0:20 Rescue has been activated
Info 0:21 Rescue has been completed
Critical 0:24 Supply Voltage dropped below 4.0V
Info 0:24 Rescue has been activated
Info 0:24 Rescue has been completed
Info 0:28 Rescue has been activated
Info 0:29 Rescue has been completed
Warn 0:30 The Cyclic Ring is active
Warn 0:35 The Cyclic Ring is active
Warn 0:35 RC Input Packet lost
Critical 0:35 RC Failsafe has been activated
Info 0:35 Rescue has been activated
Info 0:35 Rescue has been completed
Warn 0:35 Rescue has been oversteered by the Pilot
Warn 0:36 The Cyclic Ring is active
Info 0:38 Rescue has been activated
Info 0:39 Rescue has been completed
Info 0:43 Rescue has been activated
Info 0:44 Rescue has been completed
OK 0:54 Good Health Message (10sec)
Info 0:58 Rescue has been activated
Warn 0:59 The Cyclic Ring is active
Info 0:59 Rescue has been completed
Warn 0:59 Rescue has been oversteered by the Pilot
Warn 1:09 Supply Voltage dropped below 4.5V
Info 1:12 Rescue has been activated
Info 1:13 Rescue has been completed

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout
OK 0:10 Good Health Message (10sec)
OK 0:20 Good Health Message (10sec)
OK 0:30 Good Health Message (10sec)
OK 0:40 Good Health Message (10sec)
OK 0:50 Good Health Message (10sec)
OK 1:00 Good Health Message (10sec)
OK 1:10 Good Health Message (10sec)
OK 1:20 Good Health Message (10sec)
OK 1:30 Good Health Message (10sec)
OK 1:40 Good Health Message (10sec)
OK 1:50 Good Health Message (10sec)
OK 2:00 Good Health Message (10sec)
OK 2:10 Good Health Message (10sec)
OK 2:20 Good Health Message (10sec)
OK 2:30 Good Health Message (10sec)
OK 2:40 Good Health Message (10sec)
OK 2:50 Good Health Message (10sec)
OK 3:00 Good Health Message (10sec)
OK 3:10 Good Health Message (10sec)
OK 3:20 Good Health Message (10sec)
OK 3:30 Good Health Message (10sec)
OK 3:40 Good Health Message (10sec)
OK 3:50 Good Health Message (10sec)
OK 4:00 Good Health Message (10sec)
OK 4:10 Good Health Message (10sec)
OK 4:20 Good Health Message (10sec)
OK 4:30 Good Health Message (10sec)
OK 4:40 Good Health Message (10sec)
OK 4:50 Good Health Message (10sec)
OK 5:00 Good Health Message (10sec)
OK 5:10 Good Health Message (10sec)
OK 5:20 Good Health Message (10sec)
OK 5:30 Good Health Message (10sec)
OK 5:40 Good Health Message (10sec)
OK 5:50 Good Health Message (10sec)
OK 6:00 Good Health Message (10sec)
OK 6:10 Good Health Message (10sec)
OK 6:20 Good Health Message (10sec)
OK 6:30 Good Health Message (10sec)
OK 6:40 Good Health Message (10sec)
OK 6:50 Good Health Message (10sec)
OK 7:00 Good Health Message (10sec)
OK 7:10 Good Health Message (10sec)
OK 7:20 Good Health Message (10sec)
OK 7:30 Good Health Message (10sec)
OK 7:40 Good Health Message (10sec)
OK 7:50 Good Health Message (10sec)
OK 8:00 Good Health Message (10sec)
OK 8:10 Good Health Message (10sec)
OK 8:20 Good Health Message (10sec)
OK 8:30 Good Health Message (10sec)
OK 8:40 Good Health Message (10sec)
OK 8:50 Good Health Message (10sec)
OK 9:00 Good Health Message (10sec)
OK 9:10 Good Health Message (10sec)
OK 9:20 Good Health Message (10sec)
OK 9:30 Good Health Message (10sec)
OK 9:40 Good Health Message (10sec)
OK 9:50 Good Health Message (10sec)
OK 10:00 Good Health Message (10sec)
OK 10:10 Good Health Message (10sec)
OK 10:20 Good Health Message (10sec)
OK 10:30 Good Health Message (10sec)
OK 10:40 Good Health Message (10sec)
OK 10:50 Good Health Message (10sec)
OK 11:00 Good Health Message (10sec)
OK 11:10 Good Health Message (10sec)
OK 11:20 Good Health Message (10sec)
OK 11:30 Good Health Message (10sec)
OK 11:40 Good Health Message (10sec)
Critical 11:43 Aileron Sensor Value out of Range

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout
OK 0:10 Good Health Message (10sec)
OK 0:20 Good Health Message (10sec)
OK 0:30 Good Health Message (10sec)
OK 0:40 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 1 Loaded

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to OFF

Info 0:00 Motor Switch operated to Idle bailout
Info 0:05 Calibration Finished
OK 0:15 Good Health Message (10sec)
OK 0:25 Good Health Message (10sec)
OK 0:35 Good Health Message (10sec)
OK 0:45 Good Health Message (10sec)
OK 0:55 Good Health Message (10sec)
OK 1:05 Good Health Message (10sec)
OK 1:15 Good Health Message (10sec)
OK 1:25 Good Health Message (10sec)
OK 1:35 Good Health Message (10sec)
OK 1:45 Good Health Message (10sec)
Info 1:46 Raised Vibration Level
OK 1:56 Good Health Message (10sec)
OK 2:06 Good Health Message (10sec)
OK 2:16 Good Health Message (10sec)
OK 2:26 Good Health Message (10sec)
OK 2:36 Good Health Message (10sec)
OK 2:46 Good Health Message (10sec)
OK 2:56 Good Health Message (10sec)
OK 3:06 Good Health Message (10sec)
OK 3:16 Good Health Message (10sec)
Critical 3:18 Horizontal calibration error
OK 3:28 Good Health Message (10sec)
OK 3:38 Good Health Message (10sec)
OK 3:48 Good Health Message (10sec)
OK 3:58 Good Health Message (10sec)
OK 4:08 Good Health Message (10sec)
OK 4:18 Good Health Message (10sec)
OK 4:22 Horizontal Calibration done
OK 4:32 Good Health Message (10sec)
OK 4:42 Good Health Message (10sec)
OK 4:52 Good Health Message (10sec)
OK 5:02 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout
Info 0:01 Bank 1 Loaded
Info 0:01 Motor Switch operated to OFF
Info 0:05 Calibration Finished
OK 0:15 Good Health Message (10sec)
OK 0:20 Horizontal Calibration done
OK 0:30 Good Health Message (10sec)
---- end ----




2 mal bearbeitet. Zuletzt am 16.02.2023 09:19 von RV.
Dateianhänge:
öffnen | Download - log-20027667-15-02-2023-21-36-46.pdf (16.1 KB)
RV
Re: Rescue issues on Kraken 700
16.02.2023 09:25:13
Hello,

thanks for the log which unfortunately gives us no hint what happens here.

We have 2 possibilities i think:

1 - something on the model disturbes the accelerometers (they will be used for rescue) - which gives you the described rescue offset. You will also see that the rescue satus panel isn't showing the balls as it should in a upright hover then.

2 - the sensor on this device may have a issue which comes to the same result.

I would like to let the device being checked in service. Please create a service request by clicking on the service icon at your devices list here.

regards (EN) / Gruss (DE)

Rainer Vetter

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Posting and answering - please use a PC and a standard keyboard. Answer all questions fully, take the needed time, don't forget probably requested attachments.

Für Posts und Antworten bitte einen PC und eine richtige Taststaur benutzen sowie alle Fragen vollständig abarbeiten. Nehmt Euch Zeit, beantwortet Rückfragen in Ruhe und vollständig.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Für Einzelkommunikation bitte ausschließlich Email verwenden! - PN, Messenger, Chat usw. werden nicht bearbeitet.
For single user communication please send a email only! PM, Messenger, Chat etc. won't be read.
Re: Rescue issues on Kraken 700
16.02.2023 09:48:52
Hi,

what you're experiencing is a known issue with the Kraken, at least the original one.
In the meantime, SAB has changed the gearbox, and has now the fourth iteration of the fbl mount (with rubber dampening).

Reason is, hard/sharp/sided high frequency vibration (even with clipping, the vibration exceeding the measuring range in one direction), mainly from the gearbox (each tooth meshing causing a 'hit' in one direction only) is interfering with the (necessarily) sensitive accelerometers.

They need to be able to measure between +/– 1 G with decimals of acceleration (earth gravity), on all axis, to calculate the artificial horizon, all the time.

On Krakens (not meaning to bash them, just stating facts) we have measured 160+ Gs of acceleration, and it doesn't matter very much if you just fly the machine, or if you put it through it's paces.

Now, you have to filter out say 0.5 G (45° bank angle) out of 160 Gs, and never loose orientation. Good luck with that winking smiley

The only thing you can do (which SAB tried, with changes to the design), is, try and de-tune the 'bad vibrations' from the accelerometers.
Like on vintage tail gyro, on the then-common IC powered models, where the gyro had to be supported in a way so there was no tail drift any more.
Back then, it was not overly dangerous, it was only the tail drifting.
Today, it is, because if the artificial horizon is shifting or flipping, all kinds of things can happen.

Changing from Precision initialization to Standard (de-select Precision in the computer software, Setup, Swash Plate, Expert, Rescue) does just one thing: it allows the VBar to initialize with only 5/6 sensors available, in case the 6th (IMU z-axis) is mechanically sticking, from vibration on the flight before.
If 6/6 report ready, Precision initialization is used anyways.
If 5/6, the artificial horizon is calculated from the remaining sensors, which is as precise, but it circumvents the error message (swash plate servos jumping 30+ times, LED flashing red).

But the cause of the issue remains, vibration can (over some time, some minutes of flight) cause the artificial horizon to shift or flip, and Rescue can go anywhere. The sensors are usually not directly queried when Rescue is actuated, but the artificial horizon is used as a reference, which is calculated permanently, with the sensor data at hand (better if quiet, then it can even re-center) or worse if interfered, then it's kind of dead reckoning, a calculation from the last good data, and that calculation will deteriorate, the longer the sensors get no good fix on the model's attitude, or, worse, a wrong fix, from vibration.

Lastly, if you intervene with Rescue manually, it might feel weird. For example, if the VBar wants to go down (artificial horizon flipped), and you want to upright and rise the model, you are fighting Rescue's inputs, and the model might not pull away from the ground as expected.

On the ground, with most models standing slightly tilted forward, it's normal that the swash plate will also visibly compensate for that, because it does not initialize with the model's attitude at that moment, but with the earth gravity as reference.

With the latest Krakens as well as RAWs and other current models, these issues have more or less disappeared.

The log could help shedding light on it. The extended vibration analysis on VBar Control Touch or EVO could even make the noise/load to the sensors visible, and show a graph.

But if I download the log, I get an error message, can't be opened ....

Kind regards

Eddi

Born to fly ...
forced to work.
RV
Re: Rescue issues on Kraken 700
16.02.2023 10:19:31
@ Eddi:

Log must be renamed - it is a txt file. I have pasted in post above.

regards (EN) / Gruss (DE)

Rainer Vetter

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Posting and answering - please use a PC and a standard keyboard. Answer all questions fully, take the needed time, don't forget probably requested attachments.

Für Posts und Antworten bitte einen PC und eine richtige Taststaur benutzen sowie alle Fragen vollständig abarbeiten. Nehmt Euch Zeit, beantwortet Rückfragen in Ruhe und vollständig.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Für Einzelkommunikation bitte ausschließlich Email verwenden! - PN, Messenger, Chat usw. werden nicht bearbeitet.
For single user communication please send a email only! PM, Messenger, Chat etc. won't be read.
Re: Rescue issues on Kraken 700
16.02.2023 10:58:37
Thank you so much for your time and kindness. Need some time to read all that a few more times just to process all the info. I do understand the reasoning behind these issues, like I heard also the TDR2 has a similar hardware that causes these high frequency vibes that mess up rescue. I will do some more testing to see if I can reach an acceptable rescue behaviour and maybe then open a ticket and send the unit to be checked. As of now the model has the V4 fbl mount installed with the 65 rigid dampers and without the brass weight and still waiting better weather to test it. Next I will try the softer dampers, that is if my model doesn't hit the dirt in the meantime smiling smiley
Re: Rescue issues on Kraken 700
16.02.2023 18:31:13
Flew 3 packs today and got incredibly good results. Rescue behaved very nice, always listened me when oversteering it, no sharp inclinations to odd orientations while activating it. After some 3D the heli just went somewhat sideways while climbing in rescue routine, which is excepted, maybe it's just a bit more than on the previous model. Neo is now mounted with the rigid dampers and 2x3M double sided tape, no brass weight beneath it; wires enter Neo after a long loop and they don't touch the tail or the dampers. There's still plenty of extreme vibrations in the log, but otherwise I don't feel any strange behaviour in flight. Will keep monitoring the situation and see if I can get less and less extreme vibes warnings.
Here are the latest logs:

Thu Feb 16 19:11:40 EET 2023
Serial: 20027667
Firmware: 6.4
Patchlevel: 54
---- start ----
Info 0:01 Rescue has been completed
Warn 0:01 Rescue has been oversteered by the Pilot
Info 0:03 Rescue has been activated
Info 0:04 Rescue has been completed
Warn 0:04 Rescue has been oversteered by the Pilot
Info 0:08 Rescue has been activated
Info 0:09 Rescue has been completed
Info 0:11 Rescue has been activated
Info 0:12 Rescue has been completed
Info 0:15 Rescue has been activated
Info 0:16 Rescue has been completed
Info 0:21 Rescue has been activated
Info 0:22 Rescue has been completed
OK 0:32 Good Health Message (10sec)

Critical 0:00 Warmstart

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 1 Loaded

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to OFF

Info 0:00 Motor Switch operated to Idle bailout
OK 0:10 Good Health Message (10sec)
OK 0:20 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout
Info 0:01 Bank 1 Loaded
Info 0:01 Motor Switch operated to OFF
Info 0:05 Calibration Finished
OK 0:15 Good Health Message (10sec)
OK 0:25 Good Health Message (10sec)
OK 0:35 Good Health Message (10sec)
OK 0:45 Good Health Message (10sec)
OK 0:55 Good Health Message (10sec)
OK 1:05 Good Health Message (10sec)
OK 1:15 Good Health Message (10sec)
OK 1:25 Good Health Message (10sec)
OK 1:35 Good Health Message (10sec)
OK 1:45 Good Health Message (10sec)
OK 1:55 Good Health Message (10sec)
OK 2:05 Good Health Message (10sec)
OK 2:15 Good Health Message (10sec)
OK 2:25 Good Health Message (10sec)
Info 2:35 Rescue has been activated
Info 2:36 Rescue has been completed

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout
Info 0:05 Calibration Finished
Info 0:05 Bank 1 Loaded
Info 0:05 Motor Switch operated to OFF
OK 0:15 Good Health Message (10sec)
OK 0:25 Good Health Message (10sec)
OK 0:26 Horizontal Calibration done
OK 0:36 Good Health Message (10sec)
OK 0:46 Good Health Message (10sec)
OK 0:56 Good Health Message (10sec)
OK 1:06 Good Health Message (10sec)
OK 1:16 Good Health Message (10sec)
OK 1:26 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout
Info 0:01 Bank 1 Loaded
Info 0:01 Motor Switch operated to OFF
Info 0:08 Calibration Finished
OK 0:18 Good Health Message (10sec)
Warn 0:21 The Cyclic Ring is active
Warn 0:29 The Cyclic Ring is active
Info 0:32 Rescue has been activated
Info 0:33 Rescue has been completed
Info 0:34 Rescue has been activated
Info 0:35 Rescue has been completed
Info 0:39 Rescue has been activated
Info 0:40 Rescue has been completed
OK 0:50 Good Health Message (10sec)
OK 1:00 Good Health Message (10sec)
OK 1:10 Good Health Message (10sec)
Info 1:17 Rescue has been activated
Info 1:18 Rescue has been completed
Info 1:23 Rescue has been activated
Info 1:24 Rescue has been completed
Info 1:27 Rescue has been activated
Info 1:28 Rescue has been completed
Info 1:30 Rescue has been activated
Info 1:32 Rescue has been completed
Info 1:36 Rescue has been activated
Info 1:37 Rescue has been completed
Info 1:41 Rescue has been activated
Info 1:42 Rescue has been completed
Warn 1:42 Rescue has been oversteered by the Pilot
Info 1:46 Rescue has been activated
Info 1:47 Rescue has been completed
Info 1:50 Rescue has been activated
Info 1:51 Rescue has been completed
OK 2:01 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 1 Loaded

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to OFF

Info 0:00 Motor Switch operated to Idle bailout
Info 0:05 Calibration Finished
OK 0:15 Good Health Message (10sec)
OK 0:25 Good Health Message (10sec)
OK 0:35 Good Health Message (10sec)
OK 0:45 Good Health Message (10sec)
OK 0:55 Good Health Message (10sec)
OK 1:05 Good Health Message (10sec)
OK 1:15 Good Health Message (10sec)
OK 1:25 Good Health Message (10sec)
OK 1:35 Good Health Message (10sec)
OK 1:45 Good Health Message (10sec)
OK 1:55 Good Health Message (10sec)
OK 2:05 Good Health Message (10sec)
OK 2:15 Good Health Message (10sec)
OK 2:25 Good Health Message (10sec)
OK 2:35 Good Health Message (10sec)
OK 2:45 Good Health Message (10sec)
OK 2:55 Good Health Message (10sec)
OK 3:05 Good Health Message (10sec)
OK 3:15 Good Health Message (10sec)
OK 3:25 Good Health Message (10sec)
Info 3:26 Motor Switch operated to ON
OK 3:36 Good Health Message (10sec)
Info 3:45 Raised Vibration Level
Info 3:47 Rescue has been activated
Info 3:48 Rescue has been completed
Info 3:49 Rescue has been activated
Info 3:50 Rescue has been completed
Warn 3:54 High Vibration Level
Info 4:03 Rescue has been activated
Warn 4:04 High Vibration Level
Info 4:04 Rescue has been completed
Warn 4:04 Rescue has been oversteered by the Pilot
Info 4:08 Rescue has been activated
Info 4:09 Rescue has been completed
Info 4:12 Rescue has been activated
Warn 4:13 High Vibration Level
Info 4:13 Rescue has been completed
Info 4:22 Raised Vibration Level
Info 4:31 Raised Vibration Level
Info 4:31 Rescue has been activated
Info 4:32 Rescue has been completed
Warn 4:32 Rescue has been oversteered by the Pilot
Info 4:33 Rescue has been activated
Info 4:34 Rescue has been completed
Info 4:36 Rescue has been activated
Info 4:37 Rescue has been completed
Warn 4:40 High Vibration Level
Info 4:44 Rescue has been activated
Info 4:46 Rescue has been completed
Warn 4:46 Rescue has been oversteered by the Pilot
Critical 4:49 Extreme Vibration Level
Info 4:59 Raised Vibration Level
Info 5:08 Raised Vibration Level
OK 5:18 Good Health Message (10sec)
OK 5:28 Good Health Message (10sec)
OK 5:38 Good Health Message (10sec)
OK 5:48 Good Health Message (10sec)
Warn 5:54 High Vibration Level
Warn 6:03 High Vibration Level
Warn 6:12 High Vibration Level
Info 6:17 Rescue has been activated
Info 6:18 Rescue has been completed
Warn 6:18 Rescue has been oversteered by the Pilot
Critical 6:21 Extreme Vibration Level
Warn 6:30 High Vibration Level
Info 6:37 Rescue has been activated
Info 6:38 Rescue has been completed
Warn 6:38 Rescue has been oversteered by the Pilot
Warn 6:40 High Vibration Level
Info 6:41 Rescue has been activated
Info 6:42 Rescue has been completed
Warn 6:42 Rescue has been oversteered by the Pilot
Critical 6:49 Extreme Vibration Level
Warn 6:58 High Vibration Level
Info 6:58 Rescue has been activated
Info 6:59 Rescue has been completed
Info 7:02 Rescue has been activated
Info 7:03 Rescue has been completed
Warn 7:07 High Vibration Level
Info 7:09 Rescue has been activated
Info 7:10 Rescue has been completed
Warn 7:10 Rescue has been oversteered by the Pilot
Warn 7:16 High Vibration Level
Info 7:16 Rescue has been activated
Info 7:17 Rescue has been completed
Warn 7:17 Rescue has been oversteered by the Pilot
Warn 7:26 High Vibration Level
Warn 7:35 High Vibration Level
Warn 7:44 High Vibration Level
Info 7:46 Rescue has been activated
Info 7:47 Rescue has been completed
Warn 7:47 Rescue has been oversteered by the Pilot
Warn 7:53 High Vibration Level
Info 8:02 Raised Vibration Level
Info 8:08 Motor Switch operated to OFF
OK 8:18 Good Health Message (10sec)
OK 8:28 Good Health Message (10sec)
OK 8:38 Good Health Message (10sec)
OK 8:48 Good Health Message (10sec)
OK 8:58 Good Health Message (10sec)
OK 9:08 Good Health Message (10sec)
OK 9:18 Good Health Message (10sec)
OK 9:28 Good Health Message (10sec)
OK 9:38 Good Health Message (10sec)
OK 9:48 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout
Info 0:01 Bank 1 Loaded
Info 0:01 Motor Switch operated to OFF
Info 0:05 Calibration Finished
OK 0:15 Good Health Message (10sec)
OK 0:25 Good Health Message (10sec)
OK 0:35 Good Health Message (10sec)
OK 0:45 Good Health Message (10sec)
OK 0:55 Good Health Message (10sec)
OK 1:05 Good Health Message (10sec)
Info 1:09 Motor Switch operated to ON
Info 1:14 Motor Switch operated to OFF
Info 1:17 Rescue has been activated
Info 1:18 Rescue has been completed
Info 1:27 Motor Switch operated to ON
OK 1:37 Good Health Message (10sec)
Info 1:46 Raised Vibration Level
Info 1:55 Raised Vibration Level
Info 2:04 Raised Vibration Level
OK 2:14 Good Health Message (10sec)
Info 2:23 Raised Vibration Level
OK 2:33 Good Health Message (10sec)
OK 2:43 Good Health Message (10sec)
OK 2:53 Good Health Message (10sec)
OK 3:03 Good Health Message (10sec)
OK 3:13 Good Health Message (10sec)
OK 3:23 Good Health Message (10sec)
OK 3:33 Good Health Message (10sec)
OK 3:43 Good Health Message (10sec)
OK 3:53 Good Health Message (10sec)
OK 4:03 Good Health Message (10sec)
Info 4:11 Rescue has been activated
Info 4:12 Rescue has been completed
Info 4:13 Raised Vibration Level
Critical 4:22 Extreme Vibration Level
Info 4:31 Raised Vibration Level
Warn 4:40 High Vibration Level
Critical 4:49 Extreme Vibration Level
Info 4:56 Rescue has been activated
Info 4:57 Rescue has been completed
Warn 4:57 Rescue has been oversteered by the Pilot
Info 4:58 Rescue has been activated
Critical 4:59 Extreme Vibration Level
Info 4:59 Rescue has been completed
Warn 4:59 Rescue has been oversteered by the Pilot
Info 5:02 Rescue has been activated
Info 5:04 Rescue has been completed
Warn 5:04 Rescue has been oversteered by the Pilot
Critical 5:08 Extreme Vibration Level
Critical 5:17 Extreme Vibration Level
Critical 5:26 Extreme Vibration Level
Critical 5:35 Extreme Vibration Level
Info 5:45 Raised Vibration Level
Critical 5:54 Extreme Vibration Level
Critical 6:03 Extreme Vibration Level
Info 6:12 Raised Vibration Level
Info 6:17 Motor Switch operated to OFF
Warn 6:21 High Vibration Level
OK 6:31 Good Health Message (10sec)
OK 6:41 Good Health Message (10sec)
OK 6:51 Good Health Message (10sec)
OK 7:01 Good Health Message (10sec)
OK 7:11 Good Health Message (10sec)
OK 7:21 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 1 Loaded

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to OFF

Info 0:00 Motor Switch operated to Idle bailout
Info 0:05 Calibration Finished
OK 0:15 Good Health Message (10sec)
OK 0:25 Good Health Message (10sec)
OK 0:35 Good Health Message (10sec)
OK 0:45 Good Health Message (10sec)
OK 0:55 Good Health Message (10sec)
OK 1:05 Good Health Message (10sec)
OK 1:15 Good Health Message (10sec)
OK 1:25 Good Health Message (10sec)
Info 1:32 Motor Switch operated to ON
OK 1:42 Good Health Message (10sec)
Info 1:46 Raised Vibration Level
Info 1:55 Raised Vibration Level
Info 1:56 Rescue has been activated
Info 1:57 Rescue has been completed
Warn 1:57 Rescue has been oversteered by the Pilot
Critical 2:04 Extreme Vibration Level
Critical 2:13 Extreme Vibration Level
Info 2:22 Raised Vibration Level
Warn 2:32 High Vibration Level
Warn 2:41 High Vibration Level
Info 2:50 Raised Vibration Level
Critical 2:59 Extreme Vibration Level
Info 2:59 Rescue has been activated
Info 3:00 Rescue has been completed
Warn 3:00 Rescue has been oversteered by the Pilot
Info 3:01 Rescue has been activated
Info 3:02 Rescue has been completed
Warn 3:02 Rescue has been oversteered by the Pilot
Critical 3:08 Extreme Vibration Level
Warn 3:18 High Vibration Level
Critical 3:27 Extreme Vibration Level
Info 3:36 Raised Vibration Level
Critical 3:45 Extreme Vibration Level
Info 3:54 Raised Vibration Level
Warn 4:03 High Vibration Level
Info 4:13 Raised Vibration Level
Info 4:22 Raised Vibration Level
Critical 4:31 Extreme Vibration Level
Warn 4:40 High Vibration Level
Critical 4:49 Extreme Vibration Level
Info 4:59 Raised Vibration Level
Info 5:08 Raised Vibration Level
OK 5:18 Good Health Message (10sec)
OK 5:28 Good Health Message (10sec)
OK 5:38 Good Health Message (10sec)
OK 5:48 Good Health Message (10sec)

OK 0:00 Reset Reason: Power On

Info 0:00 Bank 2 Loaded

Info 0:00 Motor Switch operated to Idle bailout
OK 0:10 Good Health Message (10sec)
---- end ----



2 mal bearbeitet. Zuletzt am 16.02.2023 18:33 von azztek.
Re: Rescue issues on Kraken 700
20.02.2023 09:16:10
Hi,

sounds and looks good. Better, anyway.

It's still a thing which is somewhat on edge, if Rescue, after some time, starts to pull sideways or such.
But since you know it, you can deal with it, and not show off Rescue at the end of a flight, at ant's knee-height.
If in doubt, if you notice Rescue not going where it should, land, power-cycle (wait a few seconds between off an on) to re-initialize, continue.

The vibration entries seen in the log are very likely low frequency vibrations, which usually do not affect the accelerometers.
They can serve as a tell-tale, but what happens at the sensors is in a much higher frequency range.

The normal vibration analysis (also in Model Status, scroll down, on VBar Control, or in the computer software) has a range from 0...500 Hz or 0...30.000 1/m rpm equivalent, and can help troubleshooting if something is running untrue, or rough (motor, tail rotor, main rotor).

The vibration which are more likely to affect the accelerometers are in the kHz range, which can not be properly measured with the gyro sensors.
With VBar Control Touch or EVO, there is a (Pro) App with which you can make the loads there visible.

—Eddi

Born to fly ...
forced to work.
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