Replies to This Discussion

Permalink Reply by malcolm churn on September 23, 2011 at 1:27pm

What mode are you in .... stabilise... alt_hold etc?

Permalink Reply by Christoph on September 23, 2011 at 1:27pm

Stabilise

Permalink Reply by malcolm churn on September 23, 2011 at 1:28pm

what are your PID settings for stabilise?

 

Permalink Reply by Christoph on September 23, 2011 at 1:35pm

Good point.

The standard ones coming with the firmware on mission planer.

Roll

P 0,7

I 0,025

Pitch

P 0,7

I 0,025

Imax both 7

If the standard values should be that wrong, is there anywhere a good starting point for traditional 450 size?

 

Permalink Reply by malcolm churn on September 23, 2011 at 1:37pm

They look pretty good to me, your servos should be fine, how bad is the jitter?

what version code are you running? 

I have the filters soldered on my board, have done since the beginning.

Permalink Reply by Christoph on September 23, 2011 at 1:50pm

2.0.42

Servos are heating up a lot, as they constantly jitter.

I expected them to stand still as long as the board is not moved around.

Would it help to post my IMU readings? Maybe too much noise?

Permalink Reply by malcolm churn on September 23, 2011 at 1:53pm

ok turn the system off, what voltage are you running to the ACM and servos.

which servos are you using?

 

Permalink Reply by Christoph on September 23, 2011 at 1:56pm

5V, Hitec HS-65HB

See attached how it looks like when I run "test" "imu".

Is there too much noise from the ACM?

Attachments:

• Image1.jpg, 84 KB

Permalink Reply by malcolm churn on September 23, 2011 at 2:07pm

i cant tell from the picture, but it seems really odd that the servos are heating up this is worrying. 

Firstly i would check the servos by connecting directly to the reciver, i'm sure they will be ok but its worth checking.

Reload the code

Then i would go back through the Heli setup. 

Even when i had large PID settings and my servos were jittery they never heated up. I don't understand why this would be happening.

Solder the filter pads too. this should help.

Randy might be able to help.

 

Permalink Reply by Christoph on September 23, 2011 at 2:15pm

Ok, thanks. I will try.

Would be also interesting to know what other boards show when running the "IMU" command and the ACM is not been moved at all.

 

Just found something strange. When showing the setup in CLI. There is a line:

140: IMU_SENSOR_CAL : ??

 

Any idea what this means?

 

 

Permalink Reply by malcolm churn on September 23, 2011 at 2:25pm

No i dont, i'm not a coder, one of the other guys on here should be able to tell you. 

Sorry i can't be any more help.

Permalink Reply by Christoph on September 23, 2011 at 2:49pm

Damn, checked the servos. They are fine.

But I am one step further: It is an issue of the APM's signal to the servos. Probably something with the modulation. Maybe setup error from my side. I will check what I can find out.

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