Hi you all.
I'm new to arducopter drones, and drones at all..
I've built a Quad, using APM 2.8 Board (non-3DR), M8N Gps, 470kv 24p motors, 15x5,5 CF props, and tarot 650 CF frame, all running on 4s 10.000mah and turnigy 30A Plush ESC.
In the beggining all worked fine, i'm started to learn how to pilot the Quad, using stabilize and loiter. obviously loiter resulted more attractive because was hard to me maintain altitude when making horizontal displacement in stabilize..
some day the quad started to toiletbowl and i got scared and did everything wrong and crashed at high speed to a 25 meters tree, cutted off some branches, and fall down. Result: 1 broken arm, 2 wasted props, and complete landing gear destruction. apm and gps was scratched too.
recently i fixed the aircraft, and this time I DID COMPASSMOT (not done before!), to avoid toiletbowling. I mounted APM with 4 3M slow response foam earplugs in a double plate, and sticked to APM and frame with double-doublesided foam tape.
In stabilize is rock solid, but alt hold and loiter works weird.....
in loiter, when you let the quad hovering, it twitches the throttle, like an angry bee, i don't know how to explain. it's like the quad stops and re-run motors for a fraction of a second, and looses about 2 or 3 inches of altitude and go up again. its like a glitch. I tried to fly loiter anyway, was making squares about 2 meters above ground to practice, and suddenly... quad rocketed up in the sky... this time i was ready, and switched to stabilize. the quad started to fall, and with a throttle punch it leveled again, but at an altitude i never used it... so i decided to switch to LAND mode, and the quad suicided itself drifting away and descending too quick. this time: 2 more props wasted, and a crack in the lower main plate. gps stand was destroyed as usual..
i spended much money to start my aerial filming project, and i do not trust this aircraft to hang a professional camera on it. i thought it will be like a phantom, but bigger, nicer and stronger, capable of carrying a full dslr camera. But it is only a big and dangerous machine, and i'm hating it so hard.
i will leave you the last flight logs. if somebody with experience and expertise give me a hand and analyzes my logs, i will thank you very much.
i can only think i have a vibration issue, so i ordered a moongel pad to reinforce damping.
The big problem is i'm in Argentina, and any replacement part or upgrade takes a month to arrive, and a ton of paperwork to claim it in customs..
looking forward to fix this, and sorry for my neanderthal english.
Juan.
Replies
Hiya Juan,
From the looks of it the Baro was tracking altitude successfully so this might be useless info but there can be baro issues if the baro sensor gets exposed to sunlight as it heats up and expands and can be a real headache although that doesnt seem to be the case here.
Have you looked at possible ESC sync issues?
It is quite baffling, maybe try re flashing the firmware and recalibrating? The only thing that I can think is random vibes from motors/props or some issue with the code during flashing??
hope this helps and good luck~!
check this log with imu
2016-03-29 13-23-28.log
2016-03-29 13-18-46.tlog
Here is my flight logs
16-03-27_10-28-10.bin
16-03-27_10-42-23.bin
16-03-27_10-50-32.bin
you have heavily pulsating motors in loiter, worst than mine. you need to enable IMU logging in order to have vibrations measurement. enable it, do a test flight and post logs. we have similar issues. what motors/esc/props/lipo are you using?
I am uisng Emax 3506 with Emax 30Amp esc otpo with 1245 plastic props and 4s 6000mah battery on s500 frame.
Same motors are working fine on my other quadcopter
Well..... not a very nice day today!
I decided to do a previous step before autotune. try to spend all two batteries doing a quiet and nice althold flight, just to be sure of stabilty.
flight last only 1 minute or so...
take off in stabilize, and above 1 meter from ground, switched to althold. altitude went lock as expected, but a light wind suddenly started to raise. i had to maintain a light roll angle to hold position.
then, quad started to climb very slowly, without input. i lowered throttle a bit, but it kept climbing.
when it reached about 2 meters high, i lowered throttle a lot, expecting some descent, all this maintaning slight roll angle to hold position. suddenly, quadcopter started to climb very fast, to about 10 meters.
at this point i got scared, and switched to stabilize, to try a manual landing. of course, when stabilize came in, quad fall like a rock (yeah, throttle stick was all way down...) i tried to hit a throttle punch to stabilize but the aircraft was already in a compromised position so it never stabilized (no time to do it i guess).
luckily, only 1 prop was broken, but i'm out of those. they are coming in the same shipping the replacement arm is coming. so... no more tests upon arrival.
If any of you can take a look at the very small log, and figure out WHAT HAPPEND? WHY IT CLIMBED ON IT'S OWN?
i was feeling very comfortable, i was feeling on control of what aircraft do, but today something totaly different happened, he did things i never commanded, flown away out of control, and crashed, again. :S
Thanks for your help.
2016-03-27 18-13-27.bin
Could you attach log file charts for on-line analysis ?
BarAlt, GPSAlt, ThrOut ThrIn, AccZ, Y, Z, Battery chart ?
will give you only BarAlt, since GPS-Alt is out of chart. i live on Andes Range, 1000 meters avobe sea level. gps alt graph is nearly identical, but starts at 1000 value. Barometric altitude is measured with 0 at APM initialization.
@Juan,
excellent job done.
So you can see the problem is solved.
Your throttle is not responsive due to ..
Now I need your telemetry logs to verify APM logs.
Radio signal quality, battery status from your control station
@Santosh,
be so nice to upload alike log file charts
and telemetry logs
to let me study 2 your problems at the same time.
darius
manta103g@gmail.com
Not responsive due to... WHAT?
STOP SPAMMING, GOOD BYE!!
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