Replies to This Discussion

Permalink Reply by Ellison Chan on April 7, 2012 at 9:53am

Also can you post the log from your last flight, using Mission Planner -> terminal -> download logs?

It would be help to see what's happening with the quad.

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Permalink Reply by Mark Zimmerman on April 7, 2012 at 10:14pm

Logs attached, please check my last 3 comments in this thread

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Permalink Reply by Chris on April 7, 2012 at 9:41am

can you get over to NJ sometime?  It would be easier to troubleshoot in person,

I work in Paterson NJ, if you can get over during the week we can meet up in a local park or something and figure this out.

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Permalink Reply by Mark Zimmerman on April 7, 2012 at 10:03am

I'm out of country. Will try when I return back. But thanks for suggesting.

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Permalink Reply by Dave on April 7, 2012 at 7:03pm

It almost looks like it's going to fly in some of those shots.  It could just need a bit of correction at liftoff.

Have you ever flown a quad before?  I get the feeling maybe not, but forgive me if you already know this.  It requires a bit of practice.  First time, it took me a while to get off the ground without crashing.  I spent quite some time with the motors at just below liftoff point sliding the copter around on smooth ground (concrete) to get the feel of the controls.  Then when you do get off the ground, fly keeping the tail facing directly towards you so that the controls parallel the movement of the copter - i.e. stick left = roll left.  After quite a bit of practice (days) with this, then learn how to rotate your brain as the platform rotates, flying first left/right and ultimately flying back towards yourself where left/right fwd/back are all reversed (I'm still working on that one!)

Here's a good site: http://www.rchelicopterfun.com/how-to-fly-rc-helicopters.html

To help with this, you'll want to wrap some bright coloured tape around the front leg of the quad to show you which is front.

BTW, what flight mode are you using?  Stabilise would be best.  There is Simple mode that flies in a set direction regardless of the orientation of the copter.  However, I notice you don't have a GPS or Magnetometer, so Simple mode won't work.

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Permalink Reply by Mark Zimmerman on April 7, 2012 at 7:41pm

I have flied with Parrot and XAircraft for so much time, parrot has a takeoff feature and that solves a lot of problems. But overally I have played with Quads for some time. But thanks for suggestions.

I always use Stabilize mode and I'll add GPS and magnetometer. But I have to takeoff properly at first, always two sides of my quad rotates faster.

Thanks

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Permalink Reply by Mark Zimmerman on April 7, 2012 at 10:02pm

Hi

Changes made during last hours, learned them here in comments.

a) Connected Ground and Signal connection on ALL ESCs.

b) Manually calibrated EACH ESC.

c) Balanced ALL propellers properly.

d) To protect noise and that extension cables which may caused noise, I used original ESC cable extender and just cutted + wire on it.

Now after above changes NO ANY SIMPLE change! Everything behaves as before, exactly as originally uploaded video.

What do you think now?

Attachments:

• 20120408_091907.jpg, 1.7 MB
• 20120408_091914.jpg, 3.1 MB
• 20120408_091927.jpg, 2.7 MB

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Permalink Reply by Mark Zimmerman on April 7, 2012 at 10:05pm

More images attached:

Attachments:

• 20120408_091954.jpg, 2.3 MB
• 20120408_092002.jpg, 2.7 MB
• 20120408_092008.jpg, 2.8 MB

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Permalink Reply by Mark Zimmerman on April 7, 2012 at 10:12pm

Recent fly logs attached

Attachments:

• alogs.zip, 53 KB

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Permalink Reply by Ellison Chan on April 8, 2012 at 8:50am

Mark here's a graph of your last log, with roll_in(red) and roll(blue) plotted.

As you can see, you roll_in is not zero, which it should be if your trims and stick was centred.  From the looks of things, You have not calibrated your radio, AFTER centreing all the trims on your radio transmitter.

Also from you description of your motor test, one or more of you motors is getting intermitent signals.  This is either a bad connection at the signal in, or at the bullet connectors.  You need to check all of them and re-run your motor test.  There's no point in trying to fly, if the motor test does not pass.  You will just crash it.

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Permalink Reply by Mark Zimmerman on April 8, 2012 at 12:49pm

I re-calibrated radio again.

All cable connections including signals etc. is proper.

Recently I get sometimes (random) takeoffs, but after takeoff my quad always tries to go on some direction, like after random takeoff it tries to always go to left.

Cables are OK. But in motors test just 2 motors spin for short period of time and after some random takeoff, it always try to go on a direction.

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Permalink Reply by Mark Zimmerman on April 8, 2012 at 12:19am

I got a strange point, if it makes difference.

I go to terminal, I enter setup -> motors

Motor 1 spins a little and stops

Motor 2 spins a little and stops

Motor 3 no diff but waits necessary delay

Motor 4 no diff but waits necessary delay

Then motor 1 spins again a little and stops and so on.

Anything here?

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