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Second flight and a brownout with crash

June 5, 2016, 6:17 am
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@ajghor wrote:

Hi,
Yesterday evening I was doing some testing with my Tarot 650 Sport quad.
And I made a series of mistakes, first didn't enable logging of all data, second my rudder switch was set to AutoTune on the Pixhawk and in the same time connected to my receiver for switching between the two cameras I have onboard.

At some period of time I switched for a short period to Alt hold, then stabilize, and then probably switched to the second camera.
The sequence triggered AutoTune, which I was not aware of as I was controlling the quad as it was near a tree.
The moment I released the sticks AutoTune kicked in, and it seems to me that there was a brownout as it just shut down everything and fell of the sky. Fortunately I was flying relatively low so the fall just broke the skids which are already replaced. I am not an expert in analyzing the log, but it seems to me there was a sudden change in throttle input which I don't remember I did (had no reason for it) which resulted in a extreme drop of battery voltage under 9 volts.
I checked the batteries after and all four cells were at around 4.01-4.02 volts.

I admit I made mistakes that lead to the crash, but would like to know, if possible, why was there a brownout?
Should I blame the batteries (Multistar 8000mah 10C)? Or there was something else?
I am attaching the log of the flight.

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OneShot125+BLHeli+Damped Light

June 5, 2016, 7:18 am
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@luisvale wrote:

Hi all

I'm so sorry I wasn't filming this morning :joy:

Today I was testing 3.4RC1 on a QAV-400 style quad that has self tightening propellers

My ESC's were flashed with BLHeli, and I've enabled OneShot125 and Damped Light on the ESC's.

So, I was flying several Flight Modes without issues, and then I decided to test the safety features like Motor Interlock and Emergency Stop.

So while hovering at about 4/5 meters from the ground I engaged Emergency Stop, but wasn't expecting that the 4 props untightened themselves simultaneously and flew away, because the motors braked instantly :smiling_imp:

So, to all that use self tightening props, watch out for Damped Light on the ESC's. It gives great response, but you might end up doing the search of shame for props on the field.....

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Log analysis help

June 5, 2016, 10:49 am
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@wmedernach wrote:

Hello all,
I recently had a crash after an battery FS_BATT_FAILSAFE. My current settings were:
FS_BATT_ENABLE = 1
FS_BATT_VOLTAGE = 14
FS_BATT_MAH = 0

I realize the FS_BATT_VOLTAGE was probably a bit too high, and should have probably been set to 13.6 (4s battery), so this seems to be the cause of the FS. The problem is, after it went into FS and attempted to land, the motors continued to spin and would not power down which eventually caused the copter to flip.

Does anyone have any thoughts on why the motors would continue to spin?
Thanks in advance for any suggestions/guidance. Log is attached.
104.BIN (121.8 KB)

Warren

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YAW P and I extremely high

June 5, 2016, 11:44 am
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@X1Aero wrote:

The max P for YAW is supposed to be .5 and .05 for I. Every time I do an autotune I get 1.4 to 1.5 for P and .14 to .15 for I. Got a really good autotune for pitch and roll and yaw seems fine as well. Put the yaw to default .2 and .02 and you can see it twisting as it does auto missions. Do anything above .5 and .05 even do anything as it's beyond the max values.

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Problem ppm encoder crius

June 5, 2016, 11:54 am
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@Gijs wrote:

PPM Encoder V2.0 Crius gives channel 1, 2, and 3 by. the recipient or a R10D radio link just gives his signals but does not come to the pixhawk4. has anyone here for the solution to get this working

Gijs

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Rover seems to look for the next waypoint

June 5, 2016, 5:07 pm
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@jmkan wrote:

Hi, Setup some waypoints, rover will go to the waypoints but it seems to look for the next waypoint to go to at every waypoint. any idea?

Thanks,

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First time building a drone

June 5, 2016, 5:12 pm
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@moday4512 wrote:

Hello all, to start things off, I am a junior in Aerospace Engineering, and while I haven't taken any courses on the subject yet, I wanted to get a head start by making my own drone. The Ardupilot system sounds very interesting, and I want to try to work with it. Do you have any tips for getting started with Ardupilot, or drone building in general? At this point,the project is entirely in my head, I have not acquired any of the actual hardware yet, and this will be my first time working on something like this, but I would like to make use of arduino, and create most of the rest from scratch to learn how everything works. My hope is to complete this before summer is over. Anyways, beginners tips would be appreciated, and thanks for reading!

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I don't seem to get mavlink warning messages over telem port in many cases

June 5, 2016, 7:22 pm
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@marcmerlin wrote:

So, they do work if I have my 3DR radio in telem1 or telem2 and the other radio is plugged into apmplanner or mission planner.
I get warning messages like "airspeed not healthy"

However, those do not get sent over telem2 to my OSD unless I've plugged my 3DR radio into it first, and somehow "primed" the port so that it outputs mavlink warning messages. Once I do that, those warning messages finally show up on my OSD, until I reboot the pixhawk and then they stop again.
Note, that I do get regular mavlink (attitude, speed, gps, etc..) without problems.
Also all my SR parameters are set to more than 1 for both telemetry ports.

Now, more interesting, if I plug my 3DR radio into tower on my android phone, I do not get mavlink warning messages either.
If I plug into droid planner, there again, it does not work (I get all telem data except arming warning/error messages)
But, if I use androipilot, then it works, I get mavlink arming messages.

So, I have to conclude that there must be a magic message that apmplanner/mission/planner/andropilot send over the link to get mavlink warning messages.
Is that correct?
More generally, is there something I can do to get those messages in all my ground stations and my OSD?

Thanks

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Loiter Mode Problem

June 5, 2016, 7:32 pm
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@joeprice22 wrote:

Hi,

I am at a loss as to the issue with my quadcopter when I switch it into Loiter mode. Whenever I put the copter into Loiter mode it maintains height but drifts and doesn't respond to any controller stick movement (throttle / yaw / roll / pitch) meaning I have to switch out of it quick. I haven't tried any other GPS based modes which I assume are affected as well. Stabilize mode and alt hold mode work great as well as simple mode (thus I know the compass is working). My current setup is as follows:

FC - Pixhawk (latest V3.3.3 firmware)
GPS - 2 x M8N
Transmitter - Frsky Taranis with L9R receiver
Telemtry radio - 915 mhz

This issue has been present from the start with this copter even though I regular pickup more than 10 satellites on both GPSs . The troubleshooting I've done is as follows with no change in Loiter performance:

FC - upgraded the firmware / set the parameters to default
GPS - switched out the old GPS for a new one which I know works, added an additional one for redundancy, and elevated the position of each GPS to reduce MAG interference
Wiring - double checked the connections to the Pixhawk

Some pictures of my current setup attached. Help as I'm out of ideas!

DSC_0335.JPG1280x720 369 KB

DSC_0337.JPG1280x720 304 KB

DSC_0336.JPG1280x720 486 KB

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Is Absolute altitude supported with 3.3 and Mission Planner?

June 5, 2016, 8:18 pm
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@X1Aero wrote:

Planning flights for a job tomorrow but have no idea where the LZ will be. Thought I'd try absolute altitude in Mission Planner instead of relative. I've getting the first field populated with a 20 on takeoff which as I found out the climb angle for a plane... So I'm thinking it's not supported. Anyone know?

field.JPG1702x381 88.6 KB

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Error reading logs when trying to geo-ref images

June 5, 2016, 9:12 pm
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@nikker wrote:

Hi,

Using the latest mission planner and arducopter 3.4 rc1, when using the geo-ref tool to geo-tag my images mission planner gives me an error "error reading log".when I try to pre-process the log. I am using the same workflow that I always have and am a little bit stumped as to what is wrong with the log. I do get large logs, about 400mb (20 mins of flight) when converted to *.log as I have arducopter log almost everything. This hase not been an issue in the past but am wondering if it is now. I have used notepad++ to examine the log file and everything seems how it should be.

If the problem is the large logs causing mission planner to error, can someone provide me a link or some info for what I should be logging or some insight on what parameters I can manually remove from the .log with a text editor like notepad++ while still allowing mission planner to geo-tag the photos? I tried to edit the log with just leaving that cam and trig messages but it did not like that either.

Thanks for your help!

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LOG_BITMASK question

June 6, 2016, 4:40 am
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@netptl39 wrote:

I have a 3DR X8 built form components only for mapping.
Flies OK but problem is that I cannot use the logs as they are not containing any CAM lines.
As the outputs 1-8 are occupied by the ESCs I put the Camera trigger on RC9
Can somebody tell me what will LOG_BITMASK number should I use or how to moidify the connections to have CAM line in the log
-1 and 397310 I are already tried without luck.

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3DR X+ seems does not RTL with FS_BATT_ENABLE = 2

June 6, 2016, 4:58 am
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@Vusal_Jalilov wrote:

Hello Everyone!

I have successfully completed two auto missions with 3DR X8+, however, I am worried that the copter does not RTL even after FAIL SAFE BATTERY is triggered (I have set it to 14.3).

It could be a coincidence that both times the battery fail safe triggered just in the same moment the copter reached the last auto waypoint.

Please, have a look to the logs and share your opinion.

Regards,
Vusal

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NMEA ground speed output

June 6, 2016, 4:59 am
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@brickster86 wrote:

I am interested in using the NMEA output of MP to feed a GPS project. I noticed that the ground speed is much different than what is reported on the main MP gauges. Looking at source code file, SerialOutputNMEA.cs, there is a scaling factor of 3.6 multiplied to the ground speed parameter (MainV2.comPort.MAV.cs.groundspeed*3.6). What is this factor for? I can't come up with a conversion factor between feet/sec, meters/sec, mph, or knots for which this would be correct. The NMEA 0183 specifies that this should be knots; my setting is for meters/sec as the velocity units.

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3dr x8m short air time

June 6, 2016, 5:04 am
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@netptl39 wrote:

Hi all,

I built a 3DR X8. all components are 3dr short of the gimbal, camera and interface.
my problem with this is that it pulls 40A while hovering eating 10000mAh in arround 7minutes
AUW is 3650g

Is this standard for X8?
Doeas anyone have any idea how to lower consumption?

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Oborne.me not found

June 6, 2016, 5:13 am
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@luisvale wrote:

Hi Michael

Using 1.3.38 build 1.1.5996.30613

Going to Help tab and checking for beta updates, I get a

Update failed. The remote name could not be resolved: 'oborne.me'

My DNS servers are the google dns's 8.8.8.8 and 8.8.4.4

http://www.downforeveryoneorjustme.com/oborne.me returns the same

whois - Registry Expiry Date: 2016-08-11T12:42:59Z

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Bad channel 1 input in mission planner

June 6, 2016, 8:36 am
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@Joseph_Jackson wrote:

Hi all, I've run into a issue on my 250 build. I cannot get the gui to show any response to the TX while calibrating. I'm using a Turnigy 9xrpro, DJT module and a Delta 8 receiver setup with PPM. I bind the Rx and the Tx, the Rx shows a steady green light but no response in the Tx calibration part of mission planner. I am able to get a gps lock, setup the accelerometer but receive Bad channel 1 input after hitting complete. Im wondering if my Pixfalcon is faulty. All suggestions are appreciated.

Thanks

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APM Plane 3.5.3 desired pitch and roll flatline, planes crashes

June 6, 2016, 8:48 am
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3.4rc1 - Y6 now flies like a crack addict

June 6, 2016, 8:50 am
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@silverburn wrote:

A previously stable aircraft, now demoted to crack-addict levels of twitchiness and tons of Baro and "Error Pos Vert Variance" errors. No matter how much playing in EK2, it still does it. Fully tuned, but level of twitching is constant - whether hovering or flying. It's all over the place in the air.

Bin file attached. Anything jump out at anyone?

This is the airbot mini pixhawk btw, which was also swapped in at the same time as the 3.4rc1 update, but all parameters copied over from the pixfalcon.

And that last pitch up in the video? Unrequested...

https://www.dropbox.com/s/mtjoe6dh9fsfq98/12%2006-06-2016%2013-01-38.textClipping?dl=0

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Copter 3.4-rc2 schedule

June 6, 2016, 1:42 pm
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