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Randy's Discussions

AC 2.9.1 vs 2.8.1 GPS accuracy

Started this discussion. Last reply by Drone Savant on Wednesday. 301 Replies

ArduCopter 2.9 / 2.9.1 released

Started this discussion. Last reply by Tony Foate 1 hour ago. 3583 Replies

ArduCopter 2.8 / 2.8.1 released

Started this discussion. Last reply by Виталик Apr 13. 1355 Replies

 

Welcome, Randy!

Latest Activity

Tony Foate replied to Randy's discussion ArduCopter 2.9 / 2.9.1 released
"Hi Randy, Thanks for the response. I manually set TRIM_THROTTLE to 150 as suggested. Took a lot more throttle to get the unit moving but still did not give a smooth take off. Of course, as soon as one lands, TRIM_THROTTLE is reset automatically…"
1 hour ago

Developer
Randy replied to Craig Elder's discussion APM Copter 2.9.1.b has been released
"Matt,       I'm pretty sure that the majority of compass interference that people see is caused by the PDB and battery.  It's actually not the ESCs and motors."
6 hours ago

Developer
Randy replied to Craig Elder's discussion APM Copter 2.9.1.b has been released
"Criro,       At the moment the fence is a tin-can shape so it has a circular fence that defaults to 150m from home and is meant to stop the copter from flying away horizontally and then it has an altitude limit (defaults to…"
6 hours ago

Developer
Randy replied to Craig Elder's discussion APM Copter 2.9.1.b has been released
"Edward,      The best way to judge this is if you turn on the RAW message and do a short stabilized flight.  There's a short video here to demonstrate how to do this.  Still, it looks to me that the Baro Alt…"
16 hours ago

Developer
Randy replied to Craig Elder's discussion APM Copter 2.9.1.b has been released
"Yannick,      Yes, I saw your note but I really need some log files to look into it more.  More details from Roberto about exactly which variables are not being reset would be very helpful.  We definitely appreciate…"
16 hours ago

Developer
Randy replied to Craig Elder's discussion APM Copter 2.9.1.b has been released
"Radovan,       Like Nathan, I'm interested to know what the changes are that you want to make to the GPS.  My guess is that it's reducing the expected acceleration which maybe has some improvement on the…"
16 hours ago

Developer
Randy replied to Craig Elder's discussion APM Copter 2.9.1.b has been released
"Chapelat,      Thanks!      With 3.0 you need to use the special version of Arduino 1.0.3 from the downloads area.  Also the way you set the board type is different than before.  If you look at…"
16 hours ago

Developer
Randy replied to Craig Elder's discussion APM Copter 2.9.1.b has been released
"I've just put AC3.0-rc3 into the new downloads area here and in GitHub and the MissionPlanner should start dispensing it shortly through the Beta firmwares link. Improvements over 3.0.0-rc21) bug fix for dataflash erasing unnecessarily2)…"
yesterday

Developer
Randy replied to Craig Elder's discussion APM Copter 2.9.1.b has been released
"It's definitely going onto the wiki...it'll be the new wiki somewhere."
yesterday

Developer
Randy replied to Yannick's discussion Arducopter V3.0.0 RC Beta Feedback Thread
"Mike,      It looks like the letter "H" with the motors on the tips of the letter.  "H" by itself doesn't mean much, you can build an H shaped frame and fly it with the "X" configuration…"
yesterday

Developer
Randy replied to Randy's discussion ArduCopter 2.9 / 2.9.1 released
"Tony,      I don't think setting thr-min to 35 is a good idea.  That number represents the size of the ESC's deadband at the bottom of the throttle.  So if the number is too low then the motors could stop…"
yesterday
Tony Foate replied to Randy's discussion ArduCopter 2.9 / 2.9.1 released
"TAKEOFF STABILITY WITH 2.9.1b I have an issue with run up and takeoff stability. My F330 is difficult to get off the ground nicely i.e. with no pitch/roll manual interaction. Once it is in the air, it works well. Alt_Hold also works smoothly. It…"
yesterday
Xerravon replied to Randy's discussion ArduCopter 2.9 / 2.9.1 released
"Hi, I have a quad I put an apm25 on, it was working during setup. I then went out to fly and it would not arm. Finally I noticed the altitude was reading 200 feet. I did an altitude test in cli and got this Does this mean I have a bad…"
Wednesday
Drone Savant replied to Randy's discussion AC 2.9.1 vs 2.8.1 GPS accuracy
"Annnnd FWIW, it is indeed clearly spelled out in the documents in the "Limitations" section for the ublox-6 as well. "On FLASH receivers the max output rate is limited to…"
Wednesday
Drone Savant replied to Randy's discussion AC 2.9.1 vs 2.8.1 GPS accuracy
"BTW I hunted around a bit for that thread you were talking about. I ran across this one which appears to have been…"
Tuesday
Drone Savant replied to Randy's discussion AC 2.9.1 vs 2.8.1 GPS accuracy
"=] Thanks for giving me a smile today Craig! Alas Ning is still pretty bad. I can't catch em all with this horrible threading style.  "but that is why they spec it at 2Hz" - Exactly... and I think the point David was trying to…"
Tuesday

Profile Information

About Me:
I have many years of programming experience in a variety of languages (C, C++, Java, Basic) but in the last year or so I've got hooked on programming an Atmel 128 and really enjoy the hardware side as well. Since mid to late '08 I've been slowly working away on a UAV helicopter with many ideas borrowed from vicacopter
Tell us a bit about your UAV interest
Interested in quads and helis mostly
Hometown:
Tokyo, Japan

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Randy's Blog

UAVs for measuring radiation levels in Japan

Posted on April 11, 2013 at 6:38pm 9 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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Dropping a Rover from a HexaCopter

Posted on February 11, 2013 at 8:48am 14 Comments

For those interested in using their multicopters to carry heavy objects you might be interested in the test that I performed today with Assistant Professor Nagatani-san of Tohoku university in Japan and Izu-san of…

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Hokuyo Laser Range Finder needs a home

Posted on December 25, 2012 at 9:32pm 18 Comments

I received a 2D laser range finder from the good people at Hokuyo more than 1 year ago.  My plan was to try to use it to improve ArduCopter's…

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Steps toward ESC feedback using SimonK

Posted on September 26, 2012 at 9:43pm 22 Comments

Most of the pro multicopter set-ups have feedback from the ESCs so the controller knows the status of the motors.  This is useful for all kinds of reason including:

    1. debugging the causes of crashes - the controller could log when a motor has stopped running.

    2. allows faster and better reaction to a motor failure perhaps saving you from a crash at least for…

Continue

Comment Wall (16 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, 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, 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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Season Two of the Trust Time Trial (T3) Contest has now begun. The fourth round is an accuracy round for multicopters, which requires contestants to fly a cube. The deadline is April 14th.

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