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Rescue/Bailout does not level; goes to 45 degrees  

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bckasper2
(@bckasper2)
Active Member Customer
Joined: 4 weeks ago
Posts: 3
29/09/2020 7:06 pm  

I have just purchased the Brain2 HD for my Nitro Fury Extreme to go with my DX8/SPM4651T/SPM9745.  I am having multiple issues:

1) Rescue button does the pitch boost but turns the rotor disk to 45 degrees and does not self level.  Tried this upright and inverted.  Rather un-nerving!  When it is not running on the ground the pitch boosts and the swash stays level.  In the air it turns the disk to 45 degrees

2) Cannot get telemetry to work.  I did the auto config and they show up in the roller menu but with no values for voltage or RPM.  I can double check tonight if I have the latest update for the DX8.  The receiver and Brain2 are updated.

3) The forward programming doesn't work and I can't get the integration for the settings on the transmitter to work as described below:

image

4) The rate at which rotor speed increases after a bailout autorotation.  I have the setting maxed out to 70.  It is still slower than I'd like.  Is there a way to increase this rate?

 

Thanks,

Brett


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BrainDev
(@customercare)
Member Admin
Joined: 2 years ago
Posts: 433
30/09/2020 10:52 am  

Good morning,

1) In the Wizard configuration panel n°2 of the mounting position of the control unit on the model it is written that for internal-combustion engines models a softer double-sided fixing tape than those supplied as standard must be used. What double-sided adhesive tape did you use? From our tests and those of our Beta testers we have seen that the best one is that of Futaba.
Have you verified that in flight logs, the "Global Vibrations" value never reach the value of 200?
Could you send us the file of a flight log of your flight?
If the vibrations seen by the accelerometers exceed the Earth gravity signal, the controller may have difficulty to recognize the correct and real signal from the background noise (see the "sea grass" phenomenon).

2/3) Which version of Airware are you using in your Spektrum transmitter? Spektrum has recently released several Airware updates for its transmitters and had releasing several patches because the "Text Gen" telemetry used for the integrations didn't work anymore. Moreover, with the new Airware firmware where the "Smart" functions have been introduced for the transmitters, the Auto Config doesn't recognize anymore automatically some sensors that have to be added and activated manually.
If you're using Airware 2.05 you shouldn't have any problems, if you're using the new versions you should be sure to use the latest version 2.07.03 with which "Text Gen" is working again, but with this new version you may have to manually activate the "Voltage" and "RPM" sensors.
However, send us the configuration file of your unit to allow us to do some checks.

4) Are you sure you have correctly activated the autorotation checkboxes in the three setups and have entered a sufficient value in the Bailout Timeout as explained in the balloons of the ADVANCED section? Otherwise the autorotation bailout will not activate (the green led will not flash). If as mentioned in the previous point you send us the configuration file of your control unit we can help you to make verifications. Moreover, if the autorotation bailout works correctly or there are problems that prevent its operation is clearly visible from the flight logs. If you send us a file of your flight log as mentioned in point 1 we can help you to make a diagnosis. (PS: the value of 70 as Throttle climb step is a very high value that would bring the RPM of the engine to maximum in less than a second, but in this case the clutch of your model could burn out after a few operations).

We hope to help you at least in part by giving you also the assistance that the manufacturer of your transmitter has not given you, but as always and as explained in our support form and in the rules of this forum, we can be of further help only if you send us the diagnostic files that we always ask for assistance to avoid having to make a thousand hypotheses, a thousand theories and not having to ask you a thousand questions.

BR


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bckasper2
(@bckasper2)
Active Member Customer
Joined: 4 weeks ago
Posts: 3
01/10/2020 12:28 am  

BR,

Please find the attached files. I've attached two flight logs and vibration logs and the model configuration file.

I see on the SETUP/GOV&LEVEL screen there is auto level and I have it turned off since I believe that will make the helicopter fly like drone.  Right?  I cannot turn on Rescue without Autolevel.

I did test this again today with the new firmware update 3.07 in my DX8 and I am still unable to get telemetry to work and of course the rescue violently wants to turn the helicopter over.  I said earlier that it turns the disk to 45 degrees and that must be because I am taking my finger off the rescue button at that time because if I leave the button engaged longer it goes to 90 degrees.  Perhaps if I hold it the helicopter will fully invert or just roll all the way back to the ground.

 

Also, I am using standard white 3M foam tape found at the hardware store.  Nothing special.  Is this sufficient or should I use two layers or perhaps you have a better suggestion like the Futaba you mentioned?

 

For telemetry, I do not know when to move the sticks to the lower inside positions to activate the Test GEN.  Help with this.

 

 

 


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BrainDev
(@customercare)
Member Admin
Joined: 2 years ago
Posts: 433
01/10/2020 7:00 am  

Good morning,
Thanks for the files.

First thing: in the 1st post you wrote that you are using the 4651T receiver. Your receiver uses the new Spektrum SRXL2 protocol and not the old Spektrum SRXL protocol that uses the 4649T receiver. But you have selected the Spektrum 4649T SRXL receiver icon.

immagine

If you want telemetry and integration to work, you must use the correct communication protocol by selecting the Spektrum SRXL2 icon.

immagine

As far as Auto Level and Rescue are concerned, as expected the vibrations the flight control unit receives from the model when it is in flight are exaggerated. At many times the Global Vibrations exceed 800, four times the maximum allowable limit.

immagine

It is therefore absolutely necessary to use a softer double-sided adhesive tape that dampens the vibrations of the model that are transmitted to the flight control unit. The 3M double-sided adhesive tape you have purchased is not good enough. Since the vibrations are absurdly high, we suggest to search on the internet for the "Milton Mod" solution.
In addition to this, check that the flight control unit does not touch the frame in any way but is connected to the frame only by the double-sided adhesive tape. In addition, even the cables that go to connect to the flight control unit must absolutely not be stretched but must be left loose so that even the cables do not transmit vibrations to the flight control unit.
Given the high vibrations, it is essential to block the connectors to the flight control unit so that there is no risk of them slipping out or making false contacts due to the vibrations by blocking them with hot glue to the plastic edge of the flight control unit (hot glue is easily removable).

Note, you do not need to download the same Flight Log twice from the control unit first in the "Recorded Logs" tab and then in the "Vibrations" tab and finally save twice the same file with different names. The file in the control unit is unique and contains both the values of the recorded parameters and the vibrations. For example, after downloading a Flight Log in the "Recorded Logs" tab, going to the "Vibrations" tab, the vibrations of that Flight Log are already present, you do not need to save them again and to view them just press the "Play" button.

BR


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bckasper2
(@bckasper2)
Active Member Customer
Joined: 4 weeks ago
Posts: 3
02/10/2020 1:46 pm  

I thought I sent a reply yesterday but it isn't here so I'll try and explain it again. 

I made my version of the Milton Mod and it made very little difference in vibrations although a zip tie was touching the case so I have added some fuel tubing over it an I'll see if that helps.  So far, the Rescue does the same thing.  I hit the button and it tilts the disk to about 45-80 degrees and holds it there.  I tried inverted as well.  It flipped it over then held it at some odd attitude.  I saw an old Youtube of an older version of the software and there was a calibration button during setup called SET LEVEL, or something.  How does the unit determine what level is?  Is there a calibration to determine level?

Are you saying that the Rescue doesn't work properly due to the vibrations being high?

 

I can re-send the log file later today.  The telemetry now works!

Please check all my settings for Rescue and help me make sure it is setup correctly.  I will log another flight today, Lord willing, and send it to you for analysis.


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BrainDev
(@customercare)
Member Admin
Joined: 2 years ago
Posts: 433
02/10/2020 6:23 pm  

We are obviously pleased to have been able to help you make Telemetry and Integration work.

As far as vibrations are concerned, it is as already written in our first answer: if the vibration signal is excessive masks and distorts the Earth's gravity signal read by the accelerometers. For this reason we say in the unit positioning panel that on combustion models it is absolutely necessary to use a double-sided sticker that absorbs the vibrations more than double-sided stickers for electric models supplied as standard and then in the Auto Level / Rescue section the problem of vibrations is abundantly explained and we refer again to the major problems of combustion models.

The important thing as ever is to read the instructions and understand their meaning. Exactly as should be done for the instructions of the various protocols used by the various receivers where everything is explained and written if you have the time for read the instructions fully.


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