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Randy's Groups

Randy's Discussions

figuring out the Antenna Tracker

Started this discussion. Last reply by Javier Diaz Aug 7. 7 Replies

ArduCopter-3.2 beta testing

Started this discussion. Last reply by Richard Evans 2 hours ago. 1233 Replies

ArduCopter-3.1 released!

Started this discussion. Last reply by TheMightyThor Aug 18. 1509 Replies

 

Welcome, Randy!

Latest Activity

Richard Evans replied to Randy's discussion ArduCopter-3.2 beta testing
"I loaded 3.2rc5 on my pixhawk.  for an airframe I am using a QAV 400, This is  3S setup (30C 5100 MAH).  It has a Tarot 2D, MinumOSD, 1.58 GHZ vxmitter, size, weight and power equivalent to a 3DR Arducopter Quad. I was very interested…"
2 hours ago
Reuben replied to Randy's discussion ArduCopter-3.2 beta testing
"Cheers for the reply Randy .. yes since the introduction of the spinning sphere .. compass calib.  has been an issue with each new Copter I build , My friend has a DJI unit and he only does one revolution with the copter level and one…"
8 hours ago
ReM replied to Randy's discussion ArduCopter-3.2 beta testing
"I tried 3.2-rc5 today. Auto mode with ROI - OK. PosHold mode - very good. But one time, when I flight in PosHold mode, I get errors: EKF_CHECK-2 and FAILSAFE_EKF-1. Flight mode automatic switch to Land. But this is Arducopter 2.6..."
8 hours ago
nickthecook replied to Randy's discussion ArduCopter-3.2 beta testing
"That's funny, I would say the only thing missing from Drift mode is altitude control, so I'm looking very forward to PosHold as is. :) I'm on APM, so I appreciate the concern for supporting the older hardware, for a while at least. At…"
8 hours ago
George Randall replied to Randy's discussion ArduCopter-3.2 beta testing
"This would be awesome. I think it is the only thing missing from Hybrid mode."
9 hours ago

Developer
Marco Robustini replied to Randy's discussion ArduCopter-3.2 beta testing
"Now is not possible because the "Position" mode is removed from the code, but i think should introduce it again because PosHold with the manual throttle could be very useful.I think it was removed to free up space in the APM board, but…"
9 hours ago
Chim Xotox replied to Randy's discussion ArduCopter-3.2 beta testing
"Hi Randy, Thanks for all you do! A quick question: I'm flying a custom dead-cat quad w. Pixhawk running 3.2-rc5, just updated from rc2 (which has been performing very, very  nicely). Geofence was working fine in rc2. Somewhere I thought I…"
9 hours ago
Julien Dubois replied to Randy's discussion ArduCopter-3.2 beta testing
"Thanks for feedback. Anyways, I see no interest of running >400Hz while the main_loop rate for pixhawk is 400Hz (and only 100Hz for APM) so the motor output would not be changed between 2 different loops. "
16 hours ago
Thomas Kranz replied to Randy's discussion ArduCopter-3.2 beta testing
"short update !!!! after 27 test flights with different parameters i decided to lower rc_speed from 490 to 400 and the magic "motor noise" problem is gone :-) Video is smooth except very high speed. hope to get the fix soon for testing…"
16 hours ago
George Randall replied to Randy's discussion ArduCopter-3.2 beta testing
"Hi Julien, Thanks for the response. Were you able to at least see a difference with tuning the VELZ param? I could deal with the throttle as long as it would be a little faster. Maybe logic goes against this but an example would be the flying I did…"
17 hours ago
Vishal replied to Randy's discussion ArduCopter-3.2 beta testing
"Hi Randy, I am just finished testing AC3.2_RC5, on three of my X-Quad frames (F450, F330 & my own Aluminium X-Quad frame created by my dad in year 2011. I would say that I have never seen that kind of performance before, wow, what a a great…"
17 hours ago
Darrell Burkey replied to Randy's discussion ArduCopter-3.2 beta testing
"What an amazing amount of work you have done on this release. Thanks! I've been reading through the thread and can't find the post from Leonard about an improvement made for microcomputers. I've just built a 250 and put a Pixhawk on…"
17 hours ago
Julien Dubois replied to Randy's discussion ArduCopter-3.2 beta testing
"Hi George, actually you are not alone, I had the same feeling at first sight. I've increased that VELZ param and tuned the throttle controller to be more responsive. I tryed to make a kind of hybrid throttle to have it assisted and controlled…"
18 hours ago
George Randall replied to Randy's discussion ArduCopter-3.2 beta testing
"I was able to find in the wiki a little info for this parameter: PILOT_VELZ_MAX Am I the only one that feels it would be best to have the copter climb and descend as fast in hybrid mode as it does in stabilize? With being able to fly as…"
20 hours ago
Joe Breznai replied to Randy's discussion ArduCopter-3.2 beta testing
"Your Welcome Richard"
21 hours ago
Thomas Kranz replied to Randy's discussion ArduCopter-3.2 beta testing
"EFK was / is  off for me too ! see the attached logs but strange pulsing sound from motors in alt-hold and pos-hold. any help ? Thomas"
22 hours ago

Profile Information

About Me:
Lead developer of ArduCopter. I coordinate releases, provide support for users having trouble with their copters, add new features (most often based on ideas and suggestions from the community). I also help others get their code integrated into ArduCopter.

You can find numerous video tutorials from me here: http://www.youtube.com/channel/UCm393BzMOyRPUo8MtKp5alg
Please tell us a bit about your UAV interest
Interested in quads and helis mostly. I got my start in this field by reading the electronics tutorials from Sparkfun and from watching the success of Jack Crossfire's vicacopter. I've learned an enormous amount from the combined wisdom of the people on the DIYDrones forums and members of the core dev team including Jason Short, Tridge, Doug Weibel, Leonard and many more.
Hometown:
Karuizawa, Japan

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Randy's Blog

Red Balloon Finder

Posted on June 17, 2014 at 5:04am 30 Comments

As many probably know, this year's Sparkfun Autonomous Vehicle Competition (AVC) is similar to last year's except that a new challenge has…

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GPS Glitch detection in AC3.1

Posted on December 14, 2013 at 6:42am 32 Comments

AC3.1 is going out very soon and includes a new safety feature called GPS glitch detection.  There's a wiki page about it but I'd like to highlight how it works because it's near the top of the list of safety issues.  The method…

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Dropping a Rover from Hexacopter - Part III

Posted on August 22, 2013 at 7:40pm 30 Comments

As a follow-up to the rover drops #1 and #2 I spent a day with Assistant Professor Nagatani-san of…

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UAVs for measuring radiation levels in Japan

Posted on April 11, 2013 at 6:38pm 11 Comments

Two years after the March 11th tsunami in Japan that triggered the Nuclear disaster at the Fukushima power plant, there are still just over 300 thousand people who have not been able to return to their homes due to…

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Dropping a Rover from Hexacopter - Part II

Posted on March 15, 2013 at 12:32am 14 Comments

As a follow up to an indoor test we did a about a month ago (blog post here), Assistant Professor Nagatani-san of Tohoku University, Izu-san of…

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Comment Wall (23 comments)

At 8:44am on January 5, 2011, Jack said…

Randy

I have been working on my own Quad with the NG code and have setup the Sonar and have it working very well . I have an indoor version with sonar and IR sensors and would like to know were the IR sensors are conected, what pins. I see you were working on implementing this so If you could help with basic setup I can try my hand at testing. Thanks for your work on the Sonar and good luck on the obstical avoidence.

Jack 

At 5:47am on January 30, 2011, Kári Davíðsson said…

Thanks Randy. 

I do not have write access to the svn repository.

So I will send you the changed AP_ADC lib probably later today.

I am not sure if a circular buffer is needed. The beauty of a 1st order IIR filter is that we only need one "old" sample and if a second order is needed only two old samples. But I will look a little better into the filter selection before committing anything to you.

At 5:45am on August 24, 2011, Jiro Hattori said…

Hi Randy

 One of the way to introduce technology of arduino as IMU is that something like what you have done. Most of the Japanese model flyer love to fly traditional helicopter. 

 Another approach may be exhibit something very unique at MAKE fair at Tokyo Institute of Technology.  There will be many open source hardware and software freaks as well.

At 9:10pm on March 7, 2012, Ravi said…

hi randy, i had been following your forum for align450. i just got my APM2 purple. i loaded the ardu heli firmware. everythings looks to be ok on mission planner. but there is no PWM on servo out pins. i armed the APM2 and does gets armed. the radio callibration bars move proportionately. evrything seems to be OK. but in 'status' there is no PWM on channel out pins. it shows '0' PWM on all out channels. can uou please suggets what might be the reason. the APM2 works fine with arduplane and arduquad firmware. ravi

At 5:53am on March 16, 2012,
T3
Aerhead
said…

Randy

I had a different problem with my APM2 that I was able to solve by following the procedure found in the wiki with a search for APM board problems.  My board would not connect to the planner and it works now.

Good luck

Larry

At 2:18pm on May 15, 2012, wilson javier madrid sossa said…

hello hello hug.
I can help with anything, I did several plannings flight with tri and firmware 2.0.49 and flew very well.
I did a quad and install 2.5.4 program a waypoint flight and the team took off like crazy.WP PIDs are by default and does not really move as you do. can you give me some information.

I appreciate your help

At 4:41pm on May 16, 2012, wilson javier madrid sossa said…

Please can you help me. I was flying my quadcopter and hold position when you turn the team went to ground. these are the last two log. I appreciateprompt help.

2012-05-16%2018-12-25.tlog

At 3:54pm on September 29, 2012, Marooned said…

Hi Randy

After your changes to Optical Flow I'm having troubles with compiling the sources:

ArduCopter.cpp: In function 'void init_ardupilot()':
ArduCopter.pde:-1: error: 'SPI3' was not declared in this scope
ArduCopter.pde:-1: error: 'SPI3_SPEED_2MHZ' was not declared in this scope

I have spi3.h file include in ArduCopter.pde but somehow it's not working that way. I did fetch&rebase with original repo.

At 3:12pm on September 30, 2012, Marooned said…

Sorry for troubles. It's working now. Looks like Arduino IDE had some hiccup.

I should probably move to some better IDE as I'm using Arduino only for compiling/uploading and all files are edited in my fav editor and I have to restart Arduino every time I change something as it doesn't follow outside files changes.

Anyway, sorry for bothering you.

At 6:30pm on December 1, 2012,
T3
William Premerlani
said…

Hi Randy,

Regarding a question that Shyam asked about gimbal lock when he was trying to use APM to stabilize a camera, he and I finally solved the issue. Here is a link.

No one on diydrones was able to help Shyam, he finally contacted me directly.

Best regards,

Bill Premerlani

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