Scott Reid
  • Osseo, MN
  • United States
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Z axis vibrations --> altitude issues. Looking for evidence to link these in log

Started this discussion. Last reply by Scott Reid Feb 9. 3 Replies

HiI had a frightening occurrence today where my 250-sized pixhawk / 3.2 quad suddenly started behaving very erratically in loiter mode -- rapidly gaining altitude.After spending some time graphing…Continue

Inexpensive LED strobes

Started Dec 4, 2014 0 Replies

If you already have 12V power on your craft for FPV, these:…Continue

Tags: strobe, LED

 

Scott Reid's Page

Latest Activity

Scott Reid replied to Nick's discussion Iris+ and GoPro Hero4 Smart Remote in the group IRIS
"In the past when I just want photos and don't need a video from a flight, I've set the Gopro to take a photo every 1 or 2 seconds.   It's lots of photos to sort through once you land, but it's one less distraction when…"
Apr 16
Scott Reid replied to Randy's discussion Copter-3.3 beta testing
"Re: b) increased accelerometer range from 8G to 16G to reduce chance of climb due to high vibrations (requires accel calibration) I have a 250 which had some serious altitude stability issues on 3.2.   Those problems seem to have…"
Apr 16
Scott Reid replied to Scott Reid's discussion Log analysis help - HW issue or PWM baseline/config issue? in the group ArduCopter User Group
"Interesting.. I didn't notice the GPS glitch.   It was during a time when I was in loiter, quite a while before the crash.   It was basically one record with HDOP=99.99 (the lat/long/nsats were all normal) I've sort of come to…"
Apr 12
DG replied to Scott Reid's discussion Log analysis help - HW issue or PWM baseline/config issue? in the group ArduCopter User Group
"I don't know if this was the cause of your crash, but there was a GPS fail. The interesting part is INAVErr jumped way up during that same period. Although in Stab mode, if Super Simple mode was on, it uses GPS.  I didn't look at much…"
Apr 11
Scott Reid added a discussion to the group ArduCopter User Group
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Log analysis help - HW issue or PWM baseline/config issue?

Hi all - I'm having a little trouble determining exactly what happened here.    I was doing some initial backyard low-altitude hover testing of my new Y6B.   This is a large 750 size sky-hero frame with 6S batts.Around log line 113630, one arm dropped, and I heard a motor stuttering (the sound I would hear if the PWM went too low for the channel). Fortunately just prop damage because of low altitude.   I'm trying to figure out if this was an ESC/motor sync failure, or the PWM actually went too…See More
Apr 11
Scott Reid replied to Cesar's discussion Looking for a drone to develop apps.
"Check out 3drs just announced dronekit.io"
Mar 26
Scott Reid replied to Jaewoong Jang's discussion Position mode in Arducopter 3.2.1 = Drift mode ? in the group IRIS
"Great video Erik "
Mar 26
Scott Reid replied to DG's discussion Rule of thumb on tuning please
"Yeah, it's big.. The props on it now are RCT foldable, which got lots of attention in the balancing and polishing department.  One of the reasons I chose this frame was because of how the front arms folded back, I'm hoping to make the…"
Mar 23
Scott Reid replied to DG's discussion Rule of thumb on tuning please
"I have fairly large (54mm diameter) rctimer x6 motors.    Currently have 15x5.2 CF props mounted, but also have a set of 16x5.5 APC nylon ones. Weight is 3.6kg without batteries, 5.0kg with (6Sx5000 x 2) I haven't installed gimbal or…"
Mar 22
Scott Reid replied to DG's discussion Rule of thumb on tuning please
"DG - I was curious where you ended up with PIDS on this frame?   I'm in the same boat - Just finishing up a 750 Y6, and I started with the 3DR PIDs, which, like you said, are clearly off.   This is the largest frame I've built,…"
Mar 22
Scott Reid replied to Andrew A's discussion New to the RC World: Questions on simple electronics
"That connector on your battery is called a balance plug and is only for a special type of charging called balancing. Your receiver will get power from a BEC, which takes the battery voltage down to the 5v required for the receiver. This BEC may be a…"
Mar 6
Scott Reid replied to Scott Reid's discussion Z axis vibrations --> altitude issues. Looking for evidence to link these in log
"Understood;   I'll deal with the vibrations (on a side note, it's still a mystery to me because it started 8 minutes into the flight, and nothing was loose when it came home).     Although I understand conceptually the cause…"
Feb 9
Stuart Brookes replied to Scott Reid's discussion Z axis vibrations --> altitude issues. Looking for evidence to link these in log
Feb 8
Stuart Brookes replied to Scott Reid's discussion Z axis vibrations --> altitude issues. Looking for evidence to link these in log
"Accel z if bad will affect altitude like you are seeing. The brain tries to estimate altitude based on the acceleration as well as using baro and gps altitudes. You need to figure out what the vibration is and fix it."
Feb 8
Scott Reid posted a discussion

Z axis vibrations --> altitude issues. Looking for evidence to link these in log

HiI had a frightening occurrence today where my 250-sized pixhawk / 3.2 quad suddenly started behaving very erratically in loiter mode -- rapidly gaining altitude.After spending some time graphing dataflash logs, It seems that the issue began with an as-yet-unexplained sudden increase  in vibration.   The graph snippet below shows AHRS altitude in orange, and Z axis IMU in blue.   The issue started right when the orange line shoots up for the first time, shortly before I switched to stabilize…See More
Feb 8
Jay Bryon replied to Scott Reid's discussion Dual Extrusion in the group 3D Printing Drone Parts
"NICE! Once I get my craptastic replicator running again I'll have to see if I can get it to do this as well. Possibly the first use of dualstrusion that actually has some use!"
Feb 2

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Scott Reid's Blog

How LiPo Batteries are made (with Pictures and Videos)

Posted on May 30, 2014 at 2:14pm 0 Comments

Came across this virtual tour of a LiPo factory in China;  lots of pictures, pretty interesting.

Sparkfun - How Lithium Polymer Batteries are Made…

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$15 external compass for APM 2.5

Posted on September 11, 2013 at 7:45pm 64 Comments



As a followup to a conversation in this thread: …

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