Comment by Leonardo Lisboa on May 17, 2010 at 7:11am

Hi Chris,

I flew my easystar yesterday witn version 2.6 (first flight) and found that it was wiggling a lot, even I putting a lower value in the roll settings.
Is that the case of this Z sensor issue or should I need to check something else also?

Thanks,
Leonardo

Moderator Comment by Chris Anderson on May 17, 2010 at 7:25am

Wiggling probably just means that you need to lower the Roll and Pitch gains (start with Roll and then add Pitch). Are you adjusting these:

//5-1
#define SERVO_ROLL_P .006

//6-1
#define SERVO_ROLL_P .006

But just to eliminate the possibility of a miscalibrated Z, do disable it as instructed above. Please let us know how it goes.

Comment by Leonardo Lisboa on May 17, 2010 at 7:45am

Great, thanks. I've put .004 in the ROLL_P setting but I'll try a lower value and disable the Z sensor.
Quick question. I normally fly near the beach, so what happens when the plane moves from flying over the land to flying over the water and back to the land. Due to different temperatures (water and land) can it also confuse the sensors?

Tks,
Leonardo

Developer Comment by jasonshort on May 17, 2010 at 9:34am

if the plane wiggles more in AUTO than FLY-BY-WIRE, check you are using the airspeed sensor. I wasn't using it but forgot to disable it. That caused the plane to accelerate too much and fly all over the place.

Comment by Greg Fletcher on May 17, 2010 at 7:30pm

Try toning down that filter, its only running at 20 Hz. It's takiing 400 ms to settle and if the plane is in turbulance ...?
analog2 = ((float)analogRead(2) * 0.95) + ((float)analog2 * .05);
ir_max = abs(511 - analog2) * IR_MAX_FIX;
ir_max = constrain(ir_max, 40, 600);

Comment by Greg Fletcher on May 17, 2010 at 8:00pm

That filter is bass_ackwards. Should it be this?

analog2 = ((float)analogRead(2) * 0.05) + ((float)analog2 * .95);

Developer Comment by jasonshort on May 17, 2010 at 9:21pm

I made a quick update that should make the calibration routine worked better.

Comment by Leonardo Lisboa on May 21, 2010 at 7:01am

Hi Jason & Chris, did this update fix the issue with Z sensor? Can we enable it back again?

Tks,
Leonardo

Moderator Comment by Chris Anderson on May 21, 2010 at 7:26am

The latest bug fixes are in the zip file. We haven't had a chance to fly them yet this week, so it would be great if you could test them for us.

Comment by Leonardo Lisboa on May 22, 2010 at 6:22pm

Hi Chris, couldn't test with the new file yet (just saw that now).
I've flew my airplane today disabling the Z sensor and it was a must... Even with a windy day (around 10Km/h wind) it flew completely stable and perfeclty.
No issues at all reaching the waypoints and doing a loiter over me after completing the circuit.
I went beyond and tried a landing using fly-by-wire, and it worked. I've left my tranmitter and the plane came to the ground and landed perfectly by itself.
So, disabling the Z sensor made a huge difference...
I'll test the new changes in my next flight.

Cheers,
Leonardo

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