Sean Headrick
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  • San Jose, CA
  • United States
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Trying to incorporate a delay between landing and takeoff for water sensor application.

Started this discussion. Last reply by Graham Dyer Feb 18. 9 Replies

Hi All,  I posted this over in ArduCopter User Group and got a few helpful responses but am still not havingsuccess. My goal is to land at specific way points around a body of water, like a lake for…Continue

 

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Latest Activity

Sean Headrick replied to Sean Headrick's discussion PixHawk Stability issues. ???? in the group PIXHAWK
"is clearing the eprom the reset option in the CLI or the reset on the PixHawk. I can't get it to stay in the air more than a couple seconds right now even making constant adjustments manually. Once I am there "autotune" for sure."
Oct 3
Scott replied to Sean Headrick's discussion PixHawk Stability issues. ???? in the group PIXHAWK
"I think I would clear the eprom, then download software again, calibrate, then do an autotune."
Oct 3
Sean Headrick added a discussion to the group PIXHAWK
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PixHawk Stability issues. ????

I have used APM until now to outfit all my copters ( Quads) until recently feeling the push to move to the PixHawk. I have had a few builds go perfectly fine until this morning.  I have gone over everything as best I know how to no avail.The copter arms O.K. everything seems to be "GO". When I take off , just barely hovering for a second or two before it drifts into a dive like I have a super low P gain for roll and pitch. It is generally acting completely erratic once it starts to lift off. I…See More
Oct 3

Developer
Randy replied to Sean Headrick's discussion Unexplained fly away logs here but don't quite know how to interpret. in the group ArduCopter User Group
"Darrell, I don't really know but I guess it's possible for interference if it's operating at the same frequency.  Interference of the TX/RX signal is pretty rare but it might happen some times."
Jul 23
Sean Headrick replied to Sean Headrick's discussion Unexplained fly away logs here but don't quite know how to interpret. in the group ArduCopter User Group
"Randy,   Thank you for taking a look and explaining what you saw. The dock may have had some part. It is aluminum and it seemed like the copter didn't want to arm at first as i mentioned. Maybe "bad compass health" pre arm check.…"
Jul 23
Darrell Burkey replied to Sean Headrick's discussion Unexplained fly away logs here but don't quite know how to interpret. in the group ArduCopter User Group
"This is probably a good time to ask this question. Would marine radar cause such issues? It operates in the spectrum we use for Tx. Recently, I was told about a film crew losing a craft while doing  a job for a small cruise company while…"
Jul 23

Developer
Randy replied to Sean Headrick's discussion Unexplained fly away logs here but don't quite know how to interpret. in the group ArduCopter User Group
"It's also possible that the dock might have thrown off the compass.  We've seen one report from a developer of this happening. The best way to know is, if you remember which way the vehicle was facing when it took off, you could…"
Jul 23

Developer
Randy replied to Sean Headrick's discussion Unexplained fly away logs here but don't quite know how to interpret. in the group ArduCopter User Group
"Sean, Really sorry about your troubles. I've had a look at the logs and it looks like a few things went wrong. The final crash looks like some kind of power failure.  Not a brownout but perhaps a loose prop or a failing battery.  You…"
Jul 23
Sean Headrick added a discussion to the group ArduCopter User Group
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Unexplained fly away logs here but don't quite know how to interpret.

We were doing a demo for some water resources groups here in the SF north Bay area along the delta showing salinity gradients at specific GPS locations. The protocol was to take off in auto mode and loiter at 9 meters. From there we would enter guided mode where we navigate to a specific location where a "land" flight mode was evoked from the radio. We would sit in the water and collect data for a time before repeating again. We did this several times.   After lunch we wanted to repeat the…See More
Jul 23
Sean Headrick commented on Chris Anderson's group ArduCopter User Group
"I typically rely on a battery low voltage indicator which alarms at around 10%. That is where i have considered low voltage for landing. At any rate i don't typically use the low voltage fail safe. Maybe a problem long since solved but it used…"
May 26
Sean Headrick commented on Chris Anderson's group ArduCopter User Group
"so we were running some flights over some farmland the other day and a couple things came up.. The flight plan was executing smoothly when about halfway between two waypoints the aircraft started to descend at an alarming rate. Battery power was at…"
May 26
Sean Headrick commented on Chris Anderson's group ArduCopter User Group
"That was the ticket!  Thanks On a related note, you are required to use the "relay" triggering method for this application. However , each time I connect to the APM, that specific param reverts back to "servo". I have not…"
May 23
Sean Headrick commented on Chris Anderson's group ArduCopter User Group
"I am a bit new to it, but I am triggering a couple cannon cameras with the CHDK USB connected to the with a turnigy Rx switch. All i am looking for is a high PWM signal. It seems like it shouldn't be this hard. I think I just have some servo or…"
May 20
Sean Headrick commented on Chris Anderson's group ArduCopter User Group
"Some help please! I have been trying to get two cannons to fire simultaneously while being stabilized by two servo driven gimbals running off pins RC10 and RC11.  When using 10 or 11 to trigger the cameras works those seem to be the only pins…"
May 20
Sean Headrick commented on Chris Anderson's group ArduPlane User Group
"@ tomi. By checking or un-checking the "reverse" boxes on the radio calibration page it will change the "autopilot control without affecting normal pass through control. I had the same problem."
Mar 16
Sean Headrick posted a blog post

Drones, Robotic Rovers and Citizen Scientists Join Forces to Sample a Lake’s Biodiversity

  About a year ago I first saw Ken McGary of Nerds for Nature present on the potential use cases for sUAV and ecological sensor data collection..Last weekend we ran the first in a series of tests to explore the feasibility of using UAV to test water quality. Over the past month or so this has gone from some drawings on a napkin to a proof of concept that performed near perfectly last weekend at a bioblitz at lake Merritt in Oakland CA. A…See More
Mar 2

Profile Information

About Me:
I have been a cabinet and furniture designer for about the past 15 years. My wife and moved out to the west coast about 5 years ago. I got into RC with a coax about two years ago and found the ArduCopter project page a year later. There was no turning back.
Please tell us a bit about your UAV interest
I am fascinated with the coming together of electronics and mechanics that make a multirotor possible. Add in the autonomous ability to perform tasks and take action opens up worlds of possibilities.
Hometown:
San Jose

Sean Headrick's Blog

Drones, Robotic Rovers and Citizen Scientists Join Forces to Sample a Lake’s Biodiversity

Posted on March 2, 2014 at 12:43am 0 Comments

  About a year ago I first saw Ken McGary of Nerds for Nature present on the potential use cases for sUAV and ecological sensor data collection.

.Last weekend we ran the first in a series of tests to explore the feasibility of using UAV to test water quality. Over the past month or so this has gone from some drawings on a napkin to a proof of concept that performed near perfectly last weekend at a bioblitz at…

Continue

HUGO's Multi Rotor Prop Guards. What is the best approach?

Posted on July 8, 2013 at 8:00am 9 Comments

 

I have been working recently with the Robotics Association at Embry-Riddle Aeronautical University to provide the multi-rotor component of their 2013 Roboboat competition.…

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HUGO flight tests with new GPS Decibal readings, Loiter, Stabilise

Posted on January 25, 2013 at 7:30am 8 Comments

I started  to document some flights wth HUGO this week . Here is some footage of "loiter" and "stabilise" flight modes.Also took some decibal readings from approx. 10' to 1.5'. The dB level never exceeded 95 dB. This is not a scientific test. I hope to show a comparison with open frame as a control and get some proper testing procedures in place. 

  I have been using a single axis gimbal for FPV ,…

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Comment Wall (1 comment)

At 11:49am on October 23, 2013, MicroPilot Will said…

Hi Sean

 Thanks for joining our group. Very nice quadcopters you have, they look robust and very clean. Feel free to ask me any questions you might have. Here are some specs on our heli autopilot which is capable of running various multirotor applications.

http://www.micropilot.com/products-mp2128heli-specs.htm

 

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