Stabilization issue

[thorphar]

I have just started to fly my quad after finishing the config. My first flight did not go so well. As soon as it took off i did a small circle and then suddenly the quad flipped up side down and broken one of the props off. My second flight did not go so well. Pretty much the same thing happened it went up and then flipped sideways and unfortunately the prop did not brake but the end of the quads arm snapped off. I am wondering if this is just bad luck or does the Crius board running ardupilotmpng need some calibration i have not done. I have now strapped the quad to a board to test it and all looks good. Please Could someone help me. :(

First time with a quad and it is not going so well.

SetUp:

4* Keda 20-28M 15A 1050Kv Hacker Style Brushless 4* HobbyWing 40Amp Pentium Speed Controller Gens Ace 3300 25C 3S Lipo Battery F450 Quadcopter Frame (similar to DJI Flaming wheel) Crius All In One Pro Flight Controller V2

[SirAlex]

Which version are you tried?

[thorphar]

I believe 3.0.1 R2

[thomasbutler]

I doubt the problem is with the MegapirateNG software. Just had my quad out this afternoon and it's flying great.

Here are the specs of my machine: Tiger MS2814 APC 12x3.8 40A RCTimer ESCs 3000mAh 3s 40C burst 70C custom frame Crius v1.1 All-In-One It's supposed to fly with a 4500mAh 4s, but I damaged one cell and changed it to a 3s.

thorpar, I suspect you might have a bad solder connection in one of the ESCs or just bad connections on the motor wires. With those cheapo motors, you might even have a bad wire inside the motor. I gave up on the smaller cheapo motors because of their poor quality. I will only by the best motors I can afford; Tiger, etc.

Your quad should draw about 16amps at hover, but note that full throttle will draw up to 41amps and you are using a 25C battery which can only sustain 25amps. It might not have the burst capacity to sustain that much of an intermittent current draw at higher throttle and then one of the ESCs might be shutting down. I've had this happen before.

You can see me flying go to rockford quadcopter on youtube.

Good luck!

[edw00d4711]

Since i read all the old issue-posts of thorpar. It sounds for me like a configuration error since he wants to get his quad fast in the air.... mpng nor apm is a one-click solution like naza stuff.

I would suggest you to read you MORE into the TOPIC on the following sites:

1) http://www.multi-rotor.co.uk/index.php?topic=1435.0 2) http://copter.ardupilot.com/ -> Instructions Tab (Read ALL the pages!) 3) https://code.google.com/p/arducopter/downloads/detail?name=APM2_Quad_Setup_3.pdf 4) http://www.megapirateng.com/index.php/compile-mpng-sources/ 5) http://www.megapirateng.com/index.php/how-to-configure-mpng-3-0-1-firmware/

I also would recommend to flash your AIO to 3.0.1-rc3 because of this bug -> https://github.com/SirAlex/ardupilot-mpng/issues/3. You can get the files here -> https://github.com/SirAlex/ardupilot-mpng/archive/mpng-3.0.1-r3.zip

Be sure to configure your APM_config.h to your quad setup and maybe the files mentioned on link 5).

Please report back if you got it working. Thanks!

[thomasbutler]

Additionally, I forgot to mention. thorpor, your ESC (or more than one) might be set to auto shutdown when the RC signal is lost. Might want to check the ESC config [read the ESC config sheet that came with the ESCs].

A bit off track here; that's true edw! MPNG and APM have never been for neophytes. I have to maually make set config changes in source code for MPNG to support the Crius, compile it, and upload it every time there is a release, but releases are few since they follow the relase candidate of APM (usually APM has a slew of bugs in beta releases [a pitfall of software developed by unpaid DIY programmers]). Note though that ArduCopter(APM) firmware is an open source component of 3DRs for profit UAS DIY "drone" hardware store. They have a vested interest in NOT supporting other flight controllers, so features added to support the Crius board or others will only happen by the good graces of people like SirAlex!

There was one suggestion to create a repository of compiled firmware. I think that's a good idea for neophytes, but who is going to make all the settings and compile each one; could have a batch file do it. MissionPlanner allows an upload of firmware from a local drive but not from a link (it can upload a link only from the APM firmware site [I tested MP out with a local load from a directory of MPNG firmware just to make sure it still works]). The other way is to use xloader. I tested this the other day too with MPNG 301 and the loader still works.

[j1n6]

I had experienced similar issue on MPNG 3.0.1 R2, on AIOP v2.

I set it to auto trim mode. The quad lift off as usual, hover normally. After about 10 seconds, it did a 720 flip on Roll and fall on the ground. Fortunately, I didn't lift it too high, no damage made. Although, I didn't have this issue the second time when I enabled auto trim.

I installed tilt and roll servo gimbal on pin 11 and 12 this time today I feel it hovers less stable than without. I also had problem that it balanced perfectly for awhile, then suddenly loosing balance fly towards front with the gimbal setup. (maybe it's my setup was not quite right)

My AIOP V2 board is powered with a UBEC, I think this behaviour shouldn't related to voltage issue, or maybe it is?