Frank Olaf Sem-Jacobsen
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  • Eidsvoll
  • Norway
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Compass is drifting counterclockwise in loiter, correcting in stabilise

Started this discussion. Last reply by MUNI Mar 21, 2013. 5 Replies

Hi, I've been playing around with my Quad-C APM2.5 v.2.9.1 to try to figure out why my compass is drifting. I have erased EEPROM, performed a light calibration of the compass, and selected auto…Continue

Drifting compass breaks simple mode

Started Feb 13, 2013 0 Replies

Hi guys,I was playing around with my quad copter outside today, firmware version 2.9.1. I noticed that it had a tendency to yaw slowly in one direction while hovering, requiring me to give a consul…Continue

Connecting additional servos

Started Jan 21, 2013 0 Replies

Hi,I have built a simple camera gimbal using two small analogue servos connected to RC 10 and RC11. Now I want to use a third servo to drop a payload, and I thought of using the shutter option to…Continue

Unable to download logs

Started this discussion. Last reply by Richard Boyhan Jan 19, 2013. 3 Replies

I'm having trouble reading the logs from my flights. As far as I can tell from the website I should go to console page in MissionPlanner and click "download logs" or whatever it is called. This pops…Continue

 

Frank Olaf Sem-Jacobsen's Page

Latest Activity

Frank Olaf Sem-Jacobsen commented on Tommy Sylte's group NO Ardupilot Group
"2 Jobber med å få guttungen ivrig på at vi leker med Arducopteret mitt :) http://www.youtube.com/watch?v=sd8jL4rTvMs222"
Mar 31, 2013
MUNI replied to Frank Olaf Sem-Jacobsen's discussion Compass is drifting counterclockwise in loiter, correcting in stabilise
"I use brass screw in. Twisting the ESC cable helps. Regards"
Mar 21, 2013
Frank Olaf Sem-Jacobsen replied to Frank Olaf Sem-Jacobsen's discussion Compass is drifting counterclockwise in loiter, correcting in stabilise
"Thanks for your suggestions. I already have the double layer circuit board that you describe (I think), it is the default one that comes with the quad-c kit. As for drilling the ESC cable, what does this mean?I assume that you mean iron by ferro.…"
Mar 20, 2013
MUNI replied to Frank Olaf Sem-Jacobsen's discussion Compass is drifting counterclockwise in loiter, correcting in stabilise
"Hi Frank! Now, the problem on ma board is solved! What I did? - Drilled the ESC Cable - Changed the ESC circut board with double layer version (+/- above/down side) - Removedall ferro screws and other parts I hope it helps your APM board…"
Mar 18, 2013
Frank Olaf Sem-Jacobsen replied to Frank Olaf Sem-Jacobsen's discussion Compass is drifting counterclockwise in loiter, correcting in stabilise
"Thanks for posting. I have posted something similar earlier, but got no response. However, I also noticed someone else posted on the forum with similar issues, so hopefully this is a software problem that can be easily fixed :-)"
Mar 5, 2013
MUNI replied to Frank Olaf Sem-Jacobsen's discussion Compass is drifting counterclockwise in loiter, correcting in stabilise
"Hi all.I have detected the same problem with fw 2.9.1!I had tested with flight mode Simple Mode first, hexacopter flying well, the directions are correct as armed position. After activating Loiter changed the compass direction about 90 degrees in…"
Mar 5, 2013
Frank Olaf Sem-Jacobsen posted a discussion

Compass is drifting counterclockwise in loiter, correcting in stabilise

Hi, I've been playing around with my Quad-C APM2.5 v.2.9.1 to try to figure out why my compass is drifting. I have erased EEPROM, performed a light calibration of the compass, and selected auto learning in the settings. When doing a quick test I just now I observed the following. When flying initially in stabilise I did not observe any drift, and the initial loiter was also good. After a short landing (getting disarmed and rearming) I performed a second loiter test, and this time it started…See More
Mar 4, 2013
James Overington replied to Frank Olaf Sem-Jacobsen's discussion Difference between motors
"Does the motor have this 'internal friction' when the ESC is not powered? Is it possible your ESC is in brake mode?"
Feb 26, 2013
Frank Olaf Sem-Jacobsen commented on Tommy Sylte's group NO Ardupilot Group
"Hei,  Jeg er ganske fersk ArduCopter-eier, kjoepte meg en Quad-C med APM 2.5 for en måneds tid siden.  Har fått alt til å fungere ganske bra, inntil for en uke siden. Nå roterer kompasset sakte mens jeg er i…"
Feb 25, 2013
Frank Olaf Sem-Jacobsen replied to Jeff L's discussion Weirdest compass behavior today. Please help!
"I'm having the same thing happening to me as well. The compass drifts while in flight, settles after coming back to the ground, except I might have to turn it around for the compass to reset completely..."
Feb 20, 2013
Nigel Booth replied to Frank Olaf Sem-Jacobsen's discussion uBlox GPS to APM 2.5
"Hey there, whats the 6 pin header type called? I have the APM 2.5 but am lacking the correct cable. Currently have molex 4 pin both ends... no good :("
Feb 18, 2013
Frank Olaf Sem-Jacobsen replied to Shyam Balasubramanian's discussion Best Battery for Arducopter Quad-C frame
"Most of the parameters should make sense if you look at the help page, I think.  Here is an image with my sittings.  The results seem spot on, telemetry indicates around 20A when hovering. I'm considering switching to 11" props,…"
Feb 17, 2013
Frank Olaf Sem-Jacobsen replied to Shyam Balasubramanian's discussion Best Battery for Arducopter Quad-C frame
"Have you had a look at this?  I quess it is built around some of the theory you are quoting, and is a great place for thought experiments... http://www.ecalc.ch/xcoptercalc_e.htm"
Feb 17, 2013
Frank Olaf Sem-Jacobsen posted a discussion

Drifting compass breaks simple mode

Hi guys,I was playing around with my quad copter outside today, firmware version 2.9.1. I noticed that it had a tendency to yaw slowly in one direction while hovering, requiring me to give a consul small correction in the other direction. I have previously performed the auto trim procedure, but after that I changed to a bigger battery and a heavier camera without re-trimming. This means that pitch and roll also was a bit out of whack.Now to the question: shouldn't the compass enable the copter…See More
Feb 13, 2013
iskess replied to Frank Olaf Sem-Jacobsen's discussion uBlox GPS to APM 2.5
"It only uses 4? What are the other 2 wires for? Can I just make my own 4 wire cable using the solder pads on the bottom? Thanks"
Feb 7, 2013
Frank Olaf Sem-Jacobsen replied to Jake Simon's discussion TLog to Friendlier Format
"Use python with matplotlib :)  Should not be more than 30 lines of code..."
Jan 28, 2013

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Please tell us a bit about your UAV interest
I love to tinker, and what is more fun than this?
Hometown:
Eidsvoll

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