Replies to This Discussion

Wiki NinjaPermalink Reply by Gary McCray on July 1, 2012 at 6:21pm

An interesting thought, it could provide some protection as well. 

You'd definitely want to use very low forward drop diodes in the .15 volt range if possible.

I don't think the ground loop issue amounts to much anyway but the isolation could help.

The only time the ground loop is likely to be noticeable is if you have a really high motor draw and inadequate main power wires going to your ESC.

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Permalink Reply by Bruce Jones on July 1, 2012 at 12:37am

Whoops, here's the RLOG file I promised.

Attachments:

• 2012-06-30 16-43-36.rlog, 129 KB

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Permalink Reply by david.wiens on July 1, 2012 at 8:29pm

Just built my first Octo. Hobbyking F-30A , Turnigy SK3 3530-1150. (2)Turnigy 6000mAh.  APM1-2560, with firmware 2.6

During a calm flight everythng is fine. If I bank hard, it seems like the ESC's go nuts.

You can hear the strange sound in the video

http://youtu.be/F9NnZq1CDyI

Do you guys think this is a ESC problem, flight controller problem, or something else?  Any advice would be awesome.

 

 

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Permalink Reply by Silvio on July 2, 2012 at 5:42am

Hello,

Can someone Upload the compiled 2.6 Firmware? I canot Compile the Source Code in my Arduini 1.0 Programm :(

My Problem is: I have a APM 2.0 Board with a dead USB Port, there I have soldered a FTDI TTL interface on the UART0, now I can Configure my APM 2.0 over this Port, but i cannot upload the new Firmware.

Greets

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Permalink Reply by ultrojo on July 2, 2012 at 7:47am

look at the video.. my problem video result still not smooth.

my quad frame X650, 2.2kg (included 4s , vtx,gopro), APM2 FC, v2.6

i use MC6500PRO camera gimbal and MP set gain set to 3 (faster response for camera gimbal)

quad all stock PID except STAB ROLL / PITCH "P"  value is 3.5.

the quad seem flying smoothly.

question:

1) is it i need to lower my STAB ROLL / PITCH "P"  value to let says 2.0? to get smooth hover/flying so that my gimbal will stabled and not to push to hard?

2) i have no idea how to set YAW setting. when STAB mode, push YAW stick slowly and quad bounce back

thanks for answer..

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Permalink Reply by Matt Gaige on July 2, 2012 at 9:31am

From your statement, do you know that Gimbal Gain is not for faster response, it is for scaling of travel?  "3" is high.

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Permalink Reply by ultrojo on July 2, 2012 at 9:38am

default Gain for gimbal is 1. which is slower reaction. i try to increase the gain value to 2,3 and 4 , the gimbal more responsive. maximum gain is 4. i just put 3.

i dont see any travel change if i increase gain.

correct me if i am wrong.. i just want to make Aerial video smooth.

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Permalink Reply by Matt Gaige on July 2, 2012 at 9:56am

Smoothness can be affected by your gimbal mounting method or if there is looseness or slop in the gimbal's mechanics. But again Gain is not responsiveness, it is how much the the APM will move the gimbal to keep it level. If your quad tilts 5 degrees the Gain help you calibrate the Gimbal to move 5 degrees. You may find hard mounting the camera will get you good video if your quad is smooth.

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Permalink Reply by ultrojo on July 2, 2012 at 5:55pm

....hard mounting the camera will get you good video if your quad is smooth.

i will try to do hard mounting the gimbal.

thanks for your suggestion Matt.

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Permalink Reply by Rui Manuel Cravo Marques on July 2, 2012 at 10:16am

I wish I could have video as smooth as yours ultrojo :) don't expect to have the video cooooooompletelly smooth without using camera video stabilization os editing software for that. You can get more smoothness if you use a big octo and a camera with video stabilization, but even small oscillations may provoke some wobble in the image and if you have a small hexa or quad, the gimball will most likely be on the props turbulence area, then the gimball may be "shaken" by that turbulence. Try software like vReveal to improve the image quality, but let me say, I liked what I saw.

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Permalink Reply by ultrojo on July 2, 2012 at 5:39pm

u are right Rui,

i try to upload in youtube and edit "Stabilize" from  youtube, the video smooootthhh..

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Permalink Reply by Rui Manuel Cravo Marques on July 2, 2012 at 5:44pm

Also, another tip. Those videos you see at the gimball manufacturer site, are at 60fps. If you're using a gopro, I believe you have a mode with 60fps recording speed. Try to make a video at that speed and then in media player, play it at half the speed :) you will have a 2x slow motion at 30fps, that's how most videos get those soft flight look transitions.

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