Replies to This Discussion

3D RoboticsPermalink Reply by Chris Anderson on June 25, 2012 at 12:39am

Have you set your compass declination and calibrated it with a live calibration?

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Permalink Reply by Bart Mowrey on June 25, 2012 at 12:55am

I have, and down to 5 decimal places.

Also have gone over the posts here like the freakin zapruder film to get past the learning curve. There are  consistantly other issues as well, like never a smooth liftoff unless i really throttle it up at the same time as its spinning. Enough to drive a guy batty. IM sure its something Im not hip to in the setup though as a newb i cant be sure of whats a normal behaviour or some totally abnormal thing. I can get a little ways if i throw it into loiter mode, but otherwise i cant seem to keep it level or hovering real well or consistantly

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DeveloperPermalink Reply by R_Lefebvre on June 25, 2012 at 6:11am

My guess is that your frame/motors/something is bent, causing a yaw tendency, and it takes a bit of time for the controller to figure it out.  But it's hard to say for sure, I'd need to see the flash log with PID enabled and set to the yaw controller.

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Permalink Reply by Bart Mowrey on June 25, 2012 at 9:53am

Thats entirely possible i suppose. Fwiw the behaviour was there from the first liftoff attempt, and visually everything appears to be square, so it cant be off by much. I actually rebuilt the motor mounts from the get-go as using only 2 screws bent the motor casing which in turn caused shaft binding which was obviously going to create problems.

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Permalink Reply by Bart Mowrey on June 25, 2012 at 12:51pm

Pardon the stench of newbness, but how do i set up the APM to log this? I can t locate anything in the planner to do so. ( this is just hand flying missions so far)

i am using the newest rev of both firmware and planner with the mavlink 1.0

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DeveloperPermalink Reply by R_Lefebvre on June 25, 2012 at 1:35pm

You need to go into the CLI to modify what you are logging.  So you want to turn PID logging on, and make sure ATT is on as well.

Then, to actually log the yaw PID data, you need to set Ch6 tuning to Yaw_Rate_P.  Don't actually change your Rate P value....  just need to set it to that so that it will log.  That's how the PID logging works.

So, that's about it.

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Permalink Reply by Bart Mowrey on June 25, 2012 at 2:30pm

awesome- thanks so much- info is a bit tough to find around here. ill post up a log when i can actually fly it again- busted props and whatnot from the repeated hard landings and abortive takoffs with a full gainer and triple lindy.

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Permalink Reply by Bart Mowrey on June 26, 2012 at 1:02am

Potentially stupid question: how long should the process of downloading logs take? Im starting to think theres something seriously wrong with this APM as its taking hours to download logs, and spits out garbage in the CLI..

MOF here's output from the CLI. ( these are ALL of the characters... )

NTER3 tmes or LI

opter V2.6] U/VWXYZ[!\]L^rq_

`abc*`deGnfy

hw Invalid command, type 'help' ArduCopter V2.6] Lsogs Inalid ommad, tpe 'elp' ArduopterV2.6 !}a/BBB_+B~BBCB,)B|BgBDB:EBB_B( M Invalid comand, type 'elp' AduCoter 2.6 g .-P @^~p<BN#2L {!"]#E#$S%(-&' nvlid comand, ype 'elp' rduCoter V2.] UBXVBBMFXYZ[!\]L^rq_`abc*`d nvalid ommand, tye 'hlp' ArduCoter V.6]Ls!}a/B|ou=KC3&M/Q(E{!_Hhv%fBBW M nvalid cmmand, tpe 'elp' rduopte V2.] g .-P @^~p<BN#2L {!"]#E#$S%(-&' 2 rvaid cmman, tye 'elp' rduCopterV2.6 Ls!}a/B|ou=KC3&M/Q(E{!_Hhv%f+zx nvalid ommand, tye 'hlp' ArduCpterV2.6 g .-P @^~p<BN#2L {!"]#E#$S%(-&'

Are random characters prints a normal occurance or am i looking at a screwy APM? Again, newb to the microcontroller arena here

Thanks for your help!

Bart

 

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DeveloperPermalink Reply by R_Lefebvre on June 26, 2012 at 7:04am

Yeesh, I dunno, but I don't thing you should be seeing that.  Are you downloading the logs through the CLI, or are you using the GUI in MP?  I use the GUI, it's easy, and I never see anything like that.  It definitely shouldn't take "hours".  Maybe 15 minutes or something like that.

You might need to try completely erasing the flash and trying again.

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Permalink Reply by Bart Mowrey on June 26, 2012 at 10:35am

im using the planner GUI and i wasnt overstating the time for effect, and had connected and reconnected several times. THis morning however it seems to have straightened itself out somehow and things appear to be working properly ATM. i realize the PID logging hasnt been enabled as you requested, but if you graph the yaw you can see whats going on.not sure which files are really needed so im posting all three. Ill do a real one with PIDs enabled in the next few days, if your offer still stands.

Thanks

Bart

Attachments:

• 2012-06-26 10-49 73.kmz, 38 KB
• 2012-06-26 10-49 73.log.gpx, 98 KB
• 2012-06-26 10-49 73.log, 1.2 MB

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DeveloperPermalink Reply by R_Lefebvre on June 26, 2012 at 11:21am

Yeah, there's not much I can get from that, I need the PID.  I will say that it appears maybe you have some excessive vibration or magfield or something.

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Permalink Reply by Bart Mowrey on June 26, 2012 at 12:38pm

I did have an excessive vibration and magfield in college, but some doxycyclene cleared it right up. THanks for looking- im really thinking theres more going on here than my ignorance

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