Joel
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Joel's Discussions

Toilet Bowl effect in loiter even after calibration

Started this discussion. Last reply by Joel Nov 16. 5 Replies

Hello there,I'm trying to get an octocopter I built to perform well enough on Loiter. Stabilize always works really well, but loiter sometimes works and sometimes doesn't.It shows toilet bowl-like…Continue

Tags: x8, octocopter, arducopter, compass, loiter

China Restricts Exports of Drones, Supercomputers

Started Aug 4, 2015 0 Replies

I saw an article about China banning the export of drone(parts) and supercomputer(parts). It appears China is going to ban the more high end drones, including drones with "wind stabilization" and…Continue

 

Joel's Page

Latest Activity

Joel replied to Joel's discussion Toilet Bowl effect in loiter even after calibration
"Thanks for both of your insights. Based on the given suggestions, I made some changes and flew again in two areas. I tested Loiter and WPNav, with success. However I am not convinced the problem won't come back again, time will tell.  I…"
Nov 16
Aero Hawk replied to Joel's discussion Toilet Bowl effect in loiter even after calibration
"How close are your esc's to the pixhack or gps? Somethings that ussually helps is raising the gps on a mast, moving gps away from power wires and esc's, twisting the ground and power wires to reduce electromagnetic interference."
Nov 14

Moderator
Graham Dyer replied to Joel's discussion Toilet Bowl effect in loiter even after calibration
"Yes, currents in the FC and close peripherals can cause magnetic interference, definitely. APM2.0 had problems as it only had compass onboard and many things were tried to get around this. The way I understand it is that you can disable the internal…"
Nov 12
Joel replied to Joel's discussion Toilet Bowl effect in loiter even after calibration
"You're right, I am only using the internal compass. Quite stupid of me to completely forget about that.. However, I disabled it on purpose, months ago. There is a part of the story I completely forgot to mention.Months ago, the only way I could…"
Nov 12

Moderator
Graham Dyer replied to Joel's discussion Toilet Bowl effect in loiter even after calibration
"Toilet bowling is usually caused by the compass heading being out of phase with the true heading of the MR. Calibration fixes this normally on the ground but in the air other things can come into effect, particularly magnetic fields generated by DC…"
Nov 12
Joel posted a discussion

Toilet Bowl effect in loiter even after calibration

Hello there,I'm trying to get an octocopter I built to perform well enough on Loiter. Stabilize always works really well, but loiter sometimes works and sometimes doesn't.It shows toilet bowl-like behaviour, where it spirals out of control. Horizontal speed keeps increasing until it touches ground or hits something.I tried the following, to no avail:- Calibrated compass using On-Board calibration. Offsets: (X:~16 Y:~49 Z:~35)- Recalibrated acc and gyros- Adjusted (without adjusting other…See More
Nov 11

Profile Information

Please tell us a bit about your UAV interest
I'm interested in autonomous UAV's. I have been working with ArduCopter on the PX4 platform with Linux companion computers.
Hometown:
Wassenaar

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