Replies to This Discussion

Permalink Reply by Julie Macfarlane on July 29, 2011 at 2:10am

Anybody ever seen this happen before?

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Permalink Reply by Julie Macfarlane on July 29, 2011 at 2:49am

I thought it might be an electrical connection to power, but as long as the motors are spinning then the roll factor is present.

If the motors are armed and not moving, the craft sends data appropriate to its position, as I hold it and roll it around.

 

Throttle up and the craft shows the increasing roll condition. It makes the craft unflyable.

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JDronesPermalink Reply by Jani Hirvinen on July 29, 2011 at 2:58am

Have you tried hand test without APM-MP ??

 

Put props on, take firm grip from dome center and start your engines. Keep quad as far as you can so you are not get hit by props and then just give throttle till you feel lift from those. How does it feel when doing this?

 

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Permalink Reply by Julie Macfarlane on July 29, 2011 at 3:22am

I tried flying it last weekend and it did the roll thing on lifting.
Returning home, I erased and reset everything, then noticed the error when testing.

I'll load props tonight and try your suggestion.
Thanks!

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Permalink Reply by John Grouse on July 29, 2011 at 6:03am

Had the same thing and posted here about it. It was due to the high frequency vibrations generated by the motors when the props are off. Apparently you can balance the motors as well as the props by using small cable ties. I just ended up soldering the three pads on the IMU and that fixed it.

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Permalink Reply by Julie Macfarlane on July 29, 2011 at 7:35am

Which 3 pads?

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3D RoboticsPermalink Reply by Chris Anderson on July 29, 2011 at 7:51am

Julie, see the bottom of the instructions in the manual here:
http://code.google.com/p/arducopter/wiki/AC2Assembly

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Permalink Reply by Julie Macfarlane on July 29, 2011 at 10:17am

The sensor filters? Ok. It will be done tonight.

Thanks guys. Hopefully I can fly tomorrow!

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Permalink Reply by Julie Macfarlane on July 30, 2011 at 6:55am

Yeaaaa!

That stopped the body roll, but now its yaw rate will not stay in one place as its turning to the port side.

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3D RoboticsPermalink Reply by Chris Anderson on July 30, 2011 at 7:26am

Again the Troubleshooting Guide is your friend:
http://code.google.com/p/arducopter/wiki/AC2_Troubleshooting

I'm assuming you're using a magnetometer. Yaw will be iffy if not.

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Permalink Reply by Julie Macfarlane on July 30, 2011 at 10:12am

Yes it has a mag. I am also flying in simple mode.

Throttling up, just about to lift, the craft starts turning.

I have it balanced as well as I can, I'll check the balance of the props later

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Permalink Reply by Brad Hughey on July 29, 2011 at 12:08pm

This begs a question; why are the filters off by default?

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