Gary McCray
  • Male
  • Fort Bragg, CA
  • United States
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Profile Information

About Me:

I am the Owner and Author of these advertising-free informative web sites:
Now flying, rolling or under construction:
  • Hoverthings FLIP FPV Pro Quadcopter with Pixhawk, 14" props, KDE 515kv motors, telemetry, Sony AS100V Video Camera, Brushlesss Gimbal and FPV.
  • Custom CF tube H/dead-cat Quadcopter with Pixhawk, GoPro, Gimbal & FPV.
  • Hoverthings FLIP Sport Quadcopter with PX4.
  • ARF DJI FlameWheel 330 Quadcopter with PX4.
  • ARF DJI Flamewheel 450 Quadcopter with APM 2.5.
  • Blade 200 QX, Hubsan X4 and Estes Nano Quadcopters.
  • My design: Hanging pendulum style robot with 2 brushless 26" bicycle wheels.
  • Traxxas Stampede 4x4 Rover with PX4.

Professional History:
  • (Retired) Microcomputer Engineer, Hardware and Firmware.
  • (Past) Lead Editor of DIYDrones APMcopter, APMplane and APMrover wikis.

Please tell us a bit about your UAV interest
  • Reentry into RC Planes 3 years ago.
  • Lots of PIC hardware and C and assembler programming experience.
  • Currently interested in Quadcopter development, robotics, 3D vision, environment relative autonomous navigation, Linux, Beagle Bone, Odroid, TOF cameras and LIDAR.

Hometown:
Mendota Illinois

Latest Activity

Gary McCray commented on Jeevan Kalanithi's blog post More gimbal news
"Hi Jeevan, Good explanation and good reason for making last minute change, Torque reaction against a softly mounted top plate. Frustratingly difficult to predict or assess. Possibly what would be most helpful is getting out in front of these…"
18 hours ago
Dan Murray commented on Gary McCray's blog post Great deal on a 3 axis gimbal with Alexmos controller
"Oops, didn't even see your post Gary - looks like you were right - I completely missed the option to invert in the software, probably would have been easier than switching the cables."
yesterday
Dan Murray commented on Gary McCray's blog post Great deal on a 3 axis gimbal with Alexmos controller
"Ah, scratch that...it was what I suspected. I switched two of the yaw motor cables and we're in business. Next question: any way to speed up the yaw follow? It works fine but waits a bit too long to catch up for my liking."
yesterday
Gary McCray commented on Gary McCray's blog post Great deal on a 3 axis gimbal with Alexmos controller
"Hi Dan, Do you have yaw set to Invert? On mine, the yaw definitely needed to be set to Invert with pitch and roll set to Not Invert. And Chris, Using those settings, on mine yaw seems to be working correctly although it may need to be cranked up a…"
yesterday
Dan Murray commented on Gary McCray's blog post Great deal on a 3 axis gimbal with Alexmos controller
"Hey guys, Here's a video of the issue I'm having with yaw. Seems to me like the control is reversed, as the error builds exponentially...seems like it thinks it is correct in the opposite direction. Any ideas? "
yesterday
Chris commented on Gary McCray's blog post Great deal on a 3 axis gimbal with Alexmos controller
"i set it up with your settings, but it went back to how it was when i first got it, the Yaw is glitchy, it keeps jerking like if someone is turning the power on and off every second or two. heres a video of…"
Saturday
Gary McCray commented on Ryan McIntosh's blog post Amazon proposes drones-only airspace to facilitate high-speed delivery
"My guess is that the FAA is not taking Amazons proposal seriously and I don't think anyone else should either. I think it is more of a get the ball rolling effort. And the fact is while home delivery is about as practical as communication by…"
Thursday
Gary McCray commented on Ryan McIntosh's blog post Amazon proposes drones-only airspace to facilitate high-speed delivery
"Actually, based on the fact that almost certainly the requisites for flying in the "high speed" corridor are going to require advanced vehicle avoidance and precision flying and filed flight plan operations, why not give them 350 feet to…"
Thursday
Gary McCray commented on Ryan McIntosh's blog post Amazon proposes drones-only airspace to facilitate high-speed delivery
"Although I understand and applaud the concept and realistically understand that commercial UAVs will need their own space, I seriously hope it isn't implemented at these altitudes. Zero to 400 feet AGL is hard enough to deal with let alone…"
Thursday
Gary McCray commented on Gary McCray's blog post Using a DJI 450 FlameWheel Quadcopter with the APM
"Hi Tony, although I haven't implemented it, I believe that spin on armed feature can be disabled in the Parameter setup section of Mission Planner. But it is normally enabled as it is considered a safety feature to have the motors spin slowly…"
Thursday
Tony commented on Gary McCray's blog post Using a DJI 450 FlameWheel Quadcopter with the APM
"Forgot to mention Gary. My opinion, The firmware should have a disable/Enable switch in the firmware for the motors activity for arming startup. in case others would like motors not spinning when armed. That switch would make a great extra feature…"
Thursday
Tony commented on Gary McCray's blog post Using a DJI 450 FlameWheel Quadcopter with the APM
"Thank you Gary for your very Fast Response. the motors spinning when armed is very good to know. But, how come when it is armed with that firmware, it is like a switch LOW then High. Does not seem to be a slow increase in speed, to high. when at…"
Thursday
Gary McCray commented on Gary McCray's blog post Using a DJI 450 FlameWheel Quadcopter with the APM
"Hi Tony, Yes with current firmware, the motors spin at slow speed when you arm to show that it is armed. Arm - spin - disarm - stop spin. And Thomas, A lot has happened since I first published this, but the above listed PIDs are still a good choice…"
Wednesday
Tony commented on Gary McCray's blog post Using a DJI 450 FlameWheel Quadcopter with the APM
"Hello all. has anybody fixed this problem yet? My Rig is a 450 quad with the APM2.6 ArduPilot Mega External Compass APM Flight Controller w/Ublox NEO-6M GPS my transmitter is a Turnigy TGY 9X My problem is very similiar. when I Arm the APM the…"
Wednesday
Gary McCray commented on Alexandre Mainardi's blog post PID Gains explained like never before!
"Hi Alexandre and Mike, Great video! PIDs are poorly understood by the vast majority of people, (even those of us who have to deal with them. Your video definitely describes the essential elements in the most understandable and straight forward way I…"
Jul 28
Gary McCray commented on Gary Mortimer's blog post T3 Back to the Future
"Cool Chris, I think your looking for the Bonneville salt flats. Makes me think I ought to get back to work on my 2 wheel robot that uses 500 watt brushless bicycle wheels. I definitely think we will both want an independent big red kill switch. And…"
Jul 26

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Gary McCray's Blog

Great deal on a 3 axis gimbal with Alexmos controller

Posted on June 26, 2015 at 4:00pm 46 Comments

Just had to tell all of you about this $59.95 three axis gimbal deal on EBay:

This seemed like a great deal and looks to be identical to DYS Gimbal on Hobbyking which is $200.00.

I got one and quality appears excellent though I haven't tried to use it yet (I will probably get…

Continue

My thoughts on the state of affairs.

Posted on February 11, 2015 at 9:30pm 3 Comments

Recently a local radio station asked me to comment on an interview relating to the current status of "drones".

I am enclosing the letter I sent to them declining phone interview for the reasons specified, but putting my "opinions" in writing instead for them to use as the…

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GoPro 4 is Here - Sort of!

Posted on September 29, 2014 at 10:30am 36 Comments

GoPro is finally announcing the new 4 Silver and Black:

It , of course has the new 30fps 4K and - not surprisingly costs $100.00 more than the last one so now $499.00.

Probably using the new Ambarella 9 chip, but no mention made of built in electronic image stabilization…

Continue

New 1 at a time ESC calibration method for PX4 or Pixhawk

Posted on June 28, 2014 at 2:47pm 4 Comments

One of the Problems with the PX4 / Pixhawk is that it uses a PPM-Sum receiver which when so configured may not work at all for the normal receiver based method of one at a time ESC programming.

And especially so for 4 in 1 ESCs.

The one at a time method I have developed uses the Wikis…

Continue

Comment Wall (4 comments)

At 8:14am on February 13, 2013, Jethro Hazelhurst said…

H Gary,

First off, thank you for the superb job on the F330 construction page and wiki table of contents.

I will Email you the Image so that you can put it where you see fit.

Many thanks again!

Jethro.

At 10:49pm on May 21, 2013, Jorge Antonio Saldaña Rosales said…

Hola que tal Gary sabes el hadware que necesito para hacer mi drone Cooperativo

At 5:17pm on May 22, 2013, Michael said…

Hi Gary,

Just a thing on shipping rates (from your comment). I was also mad because of high shipping. I sent support an email and they shipped the parts for free through standard mail! I got it in 2 days ( I live on the east coast). There is a size limit though, can't go above 13 oz, but for small parts its fine. Oh and btw, when you email them, ask for Lorena, it may take a day or 2 more because of her work hours, but she's been amazing with shipping like this.

 

Sorry this is the only way I could contact you!

 

Michael

At 3:35pm on March 26, 2015,
Admin
Thomas J Coyle III
said…

Hi Gary,

Re: Fire Cape

I have been thinking about it, but have not decided to move on it yet.

Thanks,

Tom C

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