Replies to This Discussion

Permalink Reply by Julie Macfarlane on August 31, 2011 at 2:55am

The props are fairly well balanced even with the stripping paint. It was redone just a short while ago. They look nasty but I used a freinds prop balancer to balance them

 

The System is in X config with the unit facing 1-3.

Mag is attached as desc in the manual (though there is no provision to set the pins forward etc in the GS)

The set up process sets my decliantion at 13.39 when it is actually neg.

GPS is getting a lock.

All motors match, all ESCs now match and are calibrated.

Motor rotation is correct according to the manual.

Props are correct for rotation.

Frame is balanced reasonably

Ive tried it in Simple and Stabilise modes.

 

I am stumped as to why it does this flipping. Its all it does. It has to be something simple.

Looking at the video, Irregardless of the yaw position, it flips eastwards.

 

3D RoboticsPermalink Reply by Chris Anderson on August 31, 2011 at 7:34am

Julie, when you do the hand hold test (carefully holding it from above, spin the props up and then move your RC sticks), does it want to tilt in the direction you would expect when you move the sticks?

 

Have you done the Motors test in the CLI to make sure you've got the motors hooked up in the right order?

 

 

 

Permalink Reply by Arifin on August 31, 2011 at 7:46am

Hi Julie,

 

i cannot download your movie, its too big for me. If you feel all is right and your qc still want to roll/flip, try this step :

 

Arm your board. Hold your qc dome/cover with your right hand, please keep away the spinning props from your body then raise the throttle slowly with your left hand. Keep raising the throttle up even your qc wants to roll or flip and make it level with your hand that hold its dome/cover. Let it flown several inchies from ground until you feel it stabilize by itself and not roll or flip again then close the throttle. Next try to take it off normally.

 

Its based on my experience while setting my ardu copter at the first time, got the same problem like yours and it gone after that. Honestly i dont know  why lol... but it works for me. By the way, also please remove your gps first, if its working then continuing the test with your gps. Hope it helps....

JDronesPermalink Reply by Jani Hirvinen on August 31, 2011 at 11:18pm

Julie your gyro init values looks rather big. There might be bad connection or something on them. I try to keep values on less than 100 on all electronics.

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ModeratorPermalink Reply by John Church on August 31, 2011 at 7:50am

Hey Julie, can you perform the same test as in your original post (connected to MP) and spin up the motors, sans props? Get the horizon to tilt, as you mention, and with the motors running grab each arm one at a time. Make note of how the horizon reacts as you "dampen" each arm. Curious as to its reaction...Thanks!

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Permalink Reply by avionics on August 31, 2011 at 7:55am

sorry i am not the expert but looking at your props one of them looks reversed, can you check as i can not see it very clearly.

 

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ModeratorPermalink Reply by John Church on August 31, 2011 at 8:03am

If you're looking at the pic on page 2, yes- props are wrong. 2 of them.

The two at quad-left need to change positions.

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Permalink Reply by Julie Macfarlane on September 1, 2011 at 5:08pm

Ok. I started from scratch and reloaded the code,

made sure that the output of the radio went to the correct inputs

The outputs went to the correct ESCs

 

When I hold the craft over my head and run up the motors I feel a clockwise torque in yaw and when tipping, get a slow response in motor speed to correct the flight.

 

I ran the craft up on a level surface just a few centimeters above ground (adjusting the tip with the radio trim), the craft does rotate in the CCW direction, but can hover. Not helpful but...

 

I crashed in the long grass and now have a motor that stutters... I stopped after that and am charging the batteries....

 

Getting closer!

 

I am adjusting the stab roll,pitch and yaw a bit upwards to see if the response will be a bit faster to change in angle. But.. Its dark and its raining again... (we got enough from tropical storm Irene)

 

Thanks for the help guys

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ModeratorPermalink Reply by John Church on September 1, 2011 at 5:52pm

Cool- yes, getting closer! Got an updated picture for us?

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Permalink Reply by Julie Macfarlane on September 1, 2011 at 5:58pm

Hard to hold the camera, press the start button, and fly a machine you are actually (well nearly) afraid of  :)

 

I have a 3 day weekend coming up. Every one will will be out of the house, so 2 days of tinkering on my car and playinbg with the quad  :)

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ModeratorPermalink Reply by John Church on September 1, 2011 at 6:00pm

Understood  :)  What about a still though? Constant yaw could still be a physical error that we might see in a picture. Lets get this thing airborne!  :D

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Permalink Reply by Julie Macfarlane on September 1, 2011 at 5:53pm

Sitting on its stand in the house, connected to the GS, I see the heading change, sometimes radically.

http://www.youtube.com/watch?v=85okL8J7VFo

 

I'll use Youtube for the videos. Sorry about the first one  :)

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