Sean Headrick
  • Male
  • San Jose, CA
  • United States
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Sean Headrick's Discussions

Trying to incorporate a delay between landing and takeoff for water sensor application.

Started this discussion. Last reply by Graham Dyer Feb 18, 2014. 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

 

Sean Headrick's Page

Latest Activity

Sean Headrick added a discussion to the group ArduCopter User Group
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Anybody heard of ESC losing calibration after ESC low voltage cutoff

  In an attempt to understand the absolute full extent of the battery payload, a field operator had conducted a test allowing the copter to loiter until it "fell" from the sky. I know, I cringed hearing this also. The following days flight resulted in a failed takeoff the first try (flipped on the launch pad), then an erratic flight to about 10 meters when the throttle was cut and an abrupt landing followed. There was negligible damage  to the aircraft. I felt like the symptoms described…See More
Jan 23
Sean Headrick replied to Sean Headrick's discussion Unexplained crash at the end of a stellar mapping flight. in the group ArduCopter User Group
"Thanks Bill,   I'll make this change . Do you think this may have led to the stalled landing procedure or perhaps the loss of throttle when I switched back to STAB. I look forward to any insights you have about the log."
Jan 19

Developer
Bill Bonney replied to Sean Headrick's discussion Unexplained crash at the end of a stellar mapping flight. in the group ArduCopter User Group
"See https://pixhawk.org/users/actuators/pwm_escs_and_servos on why you need to connect the signal GND wires to your secs, I'll try to look at your log later."
Jan 19
Sean Headrick replied to Sean Headrick's discussion Unexplained crash at the end of a stellar mapping flight. in the group ArduCopter User Group
"Typically i only plug the signal lines into the Pixhawk. I use high voltage 6S-8S ESCs that often dont come with BEC. I am powering the + bus with a 5V power supply for the camera trigger. It was not a smuch of an eqipment failure as it stopped…"
Jan 18
Choppy replied to Sean Headrick's discussion Unexplained crash at the end of a stellar mapping flight. in the group ArduCopter User Group
"Hi Sean, I had similar experience earlier in the game. How do you power the back end of the flight controller to the esc's control leads?  I found that I could fly many times without putting a BEC line into the output side (no J1 jumper)…"
Jan 18
Sean Headrick added a discussion to the group ArduCopter User Group
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Unexplained crash at the end of a stellar mapping flight.

 I say unexplained , although i actually caused the crash. I was mapping a test area that I frequent. The flight went well but at the end during the final stage of the return to launch, the aircraft stopped descending at 10 mtrs and held there. I thought it was the condition where it gets a bit stuck at the final descent stage before landing, but after about 20-25 seconds I decided to intervene. I had already lowered the throttle preparing for landing so I raised it back to 50% and switched…See More
Jan 18
Sean Headrick replied to Sean Headrick's discussion problem with PPM encoder ....but i don't think its the encoder in the group ArduCopter User Group
"I just got rid of the PPM encoder altogether and now use the satelite directly into the PixHawk. One reason I used the encoder was to be able to utilize a Dx6 with a copter and a camera trigger. Is there a way to change the input channel for channel…"
Jan 18
yuvraj replied to Sean Headrick's discussion problem with PPM encoder ....but i don't think its the encoder in the group ArduCopter User Group
"My suggestion is only change the receiver your issue will be solved !"
Jan 12
Xavier Fernandez replied to Sean Headrick's discussion problem with PPM encoder ....but i don't think its the encoder in the group ArduCopter User Group
"Check the connection polarity from the ppm encoder to the Pixhawk."
Jan 7
Sean Headrick replied to Sean Headrick's discussion problem with PPM encoder ....but i don't think its the encoder in the group ArduCopter User Group
"it is solid. I suspected the same thing and even tested the Rx on a separate simple motor setup. Typically even if there is nothing plugged into the ppm encoder it still flashes blue. I'm getting nothing. "
Jan 7
Josh Welsh replied to Sean Headrick's discussion problem with PPM encoder ....but i don't think its the encoder in the group ArduCopter User Group
"Sounds to me like your receiver isn't bound.. The colors can be green but that just means the receiver may just be outputting failsafe values.  The green bars will change w/o going in to calibrate mode, so, if you're moving sticks and…"
Jan 7
Sean Headrick added a discussion to the group ArduCopter User Group
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problem with PPM encoder ....but i don't think its the encoder

I have built several quads with the pixhawk using an AR6210 Rx and the 3DR ppm encoder. Had an issue with one today that is baffling me. The Rx is getting power through the encoder. The monitors on the "radio calibration page are green (but no input response). When I press the calibrate button , none of the red limit lines appear. And i am getting no flashing blue LED from the encoder. I figured it was the encoder had gone south so I put in a new one. Exact same symptoms. Any thoughts on this…See More
Jan 6
Sean Headrick commented on Rob_Lefebvre's blog post Sony Releases Stand-Alone Imager
"The QX 10 is probably not the best choice because of reduced functionality (no shutter speed priority). The QX 30 is a good candidate. I must admit at this stage i am more impressed with the quality of images from a A2500 Canon. We are using the…"
Dec 20, 2014
Sean Headrick commented on Gary Mortimer's blog post New Phantom?
Nov 11, 2014
Sean Headrick commented on dusl's blog post THE NEW CONCEPT UAV
"What is that picture of. Its awesome!!"
Nov 8, 2014
Sean Headrick commented on dusl's blog post THE NEW CONCEPT UAV
"I've got the aircraft, I just need the control software. The idea is to maintain control mechanisms through both flight profiles. The rear motors tilt to vertical for the VTOL flight form. I understand there is issue with the position of the…"
Nov 8, 2014

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…

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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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