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Drone Enthusiast


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R/C models


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York


Activity Feed

CloudFlyer posted a discussion
Arducopter 3.4.4 (PixHawk) bugs in altitude or yaw controllers?So I've been using copter 3.4.4 since January2017  and have had this mystery problem the entire time with the drone descending at random after being completely stable for 5 to 8…
Mar 22, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"On flights where the drone does not have uncontrolled descents, IYAW is NOT doing these square edges.What is IYAW please? What effects it?"
Mar 21, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"I have just found this on herehttp://ardupilot.org/dev/docs/extended-kalman-filter.html#extended-...(Am I right in thinking please an awful lot of the parameter names and locations in the Arducopter documents are no longer correct for Arducopter…"
Mar 21, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"A new (and small) datalog attached.I'm wondering what's causing the ATT.YAW edges.Is this the EKF_MAG_CAL Mode? It's set to "After first climb and yaw"And I can see in the Log EKF3-IMX, IMY and IMZ are flat then go busy at this edge.IYAW looks like…"
Mar 21, 2017
CloudFlyer replied to Andrew A's discussion What do the acronyms AHRS, AHR2 and CTUN stand for?
"Attitude, Heading (or Height I'm not sure) Reference System....I'm looking for what CTUN means :)"
Mar 13, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"Reading this on the PX4 websitehttp://px4.io/docs/multicopter-pid-tuning-guide/

I am looking for parameters for motor band limiting.I'm not sure if the below paragraph means it's something that can be adjusted, or if it's something that just…"
Mar 10, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"Hi Andre, that's excellent thanks - I had thought of that one :)  Maybe it's a case of trying other propellers. Or spinning them faster. The motors get to their maximum rpm, and the PWM at 250us is topped-out. The motors etc are using only a tiny…"
Mar 9, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"Ok so I need to sign-up to a google drive. (I will thanks)I completely understand that it's guesswork without the info the datalogs provide.
But in my previous post I was simply asking if anyone recognised, or knew why the PWMs were diverging?I now…"
Mar 7, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"The .Bin file is 64.8Mb so too large to upload here.Is there a way to cut it up or upload it somewhere else?Log Screenshot March 1 2017.png"
Mar 1, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"I got the SD card working (Thank you) by formatting it and trying different Log bitmasks because some seemed unstable. I also got the attitude to be stable with good control response by manually tuning. Now the only real problem the drone has, is…"
Feb 28, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"Thanks Again Andre!
The Bitmask, I've been looking at Logs on the Parameter List
I just wasn't clear on what was being called a sync issue. I have not seen any sync issues from bench testing.
Can a faulty power module cause DataFlash Logs not to be…"
Jan 10, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"DataFlash Logs are still not working (they have worked for a few months and last week they just stopped working).
Tested 2 SD cards and 2 USB cables today.Tried the Log Bitmask settings.Even re-installed the latest firmware.And tried reading Logs…"
Jan 10, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"Hello Andre,I'm not clear on your advice "calculate a decimal value, enter it, not rely on some GUI (which may contain bugs)".

Sync Issue: if I setup the bench test again with handheld Tx and Rx only, what am I testing for and what am I looking…"
Jan 10, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"I have been looking at the DataFlash Logs, at the motor outputs, some go high and others can go to idle! Sometimes the signals look very noisy.

And another new problem:The DataFlash Logs won't stay saved when disconnecting the battery.They were…"
Jan 9, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"Hi Andrea K I tested the motors and propellers on a test rig, with scales, with a normal R/C receiver, before building the drone. The arm with 2 motors (co-axial) was giving 2.1Kg thrust at full throttle.
So, you'd expect 4 arms to give 8.4Kgs full…"
Jan 9, 2017
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"Hello and thanks for your replies!The drone weighs 5.5Kgs...Yes the power is intentionally marginal.The propellers are correctly mounted :)Power module is calibrated on current and voltage.
The batteries are new and hugely over-spec for the current…"
Jan 6, 2017
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