thomas Butler
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  • Dpo, AE
  • United States
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quad crash because of corrupt PID value EEPROM...no CRC check of EEPROM/PID values ???!!!

Started this discussion. Last reply by thomas Butler Aug 31, 2013. 2 Replies

My quad crashes for some unexplicable reason.  The copter would bank right on takeoff; looking at the quad from the rear (viewed from the front this would be a bank to the left)  I hooked up Mission…Continue

 

thomas Butler's Page

Latest Activity

thomas Butler replied to Kris Kitchen's discussion Landing drone flips over and will not turn off? in the group IRIS
"Hey Rob, rather than just say "really bad idea" would you please elaborate!  Thanks.   I see in this thread that YOU are supposedly working on a kill switch albeit as another ArduCopter feature. Additionally, I see right now…"
Wednesday
thomas Butler replied to Kris Kitchen's discussion Landing drone flips over and will not turn off? in the group IRIS
"I disagree! If I had had a kill switch my copter might not have been damaged as much as it was.  The copter landed on a porch roof, and the motors kept running! I like the peace of mind of a kill switch which bypasses ALL software controlled…"
Wednesday
thomas Butler replied to Cala's discussion Pixhawk connectors in the group PIXHAWK
"http://www.amazon.com/Engineer-PA-09-Micro-Connector-Crimpers/dp/B002AVVO7K <- crimp tool for $38 ! It's not set in stone that DF13 plugs must be used; Molex/JST 1.25mm pitch plugs will work."
Apr 19
thomas Butler replied to Kris Kitchen's discussion Landing drone flips over and will not turn off? in the group IRIS
"The problem with flight controller fail-safes implemented in the FC software is that the FC can be in never never land and continue to send out a PWM to the ESCs. Here is one cheap and easy option that could be considered a fail-safe, and I plan to…"
Apr 13
thomas Butler replied to Kris Kitchen's discussion Landing drone flips over and will not turn off? in the group IRIS
"I remember seeing somewhere that the motors will shut down if the copter is inverted for more than two seconds (of course this would be undesirable for acrobatic flight)...might be in the MegaPirateNG code (a port of ArduCopter for the…"
Apr 12
thomas Butler replied to Byron Will-Noel's discussion Canon SX260 vs GoPro with Flat Lense & NDVI
"The problem with the cameras with a telescoping lens is that they are easily broken, or the mechanism gets jammed by influx of dirt/dust. I have gone through about ten Nikon Coolpix cameras over the past five years. I've settled on the s3100;…"
Apr 3
thomas Butler commented on WhiteKnight's blog post TBS Blackbox now interfaced with MAVLINK based FC! (APM, Pixhawk, SmartAP, etc...)
"Hmmm! First, this post says nothing about what the "TBS Blackbox" is; might be a good idea to give a description!  Second, it is noteworthy that the cable has a DF13 on one end and a Molex connector on the other. The use of a Molex…"
Apr 1
thomas Butler commented on Víctor Mayoral's blog post Erle-brain, an open hardware Linux autopilot
"Why do you morons keep calling your products "brains'? It is as obnoxious as the "i" craze of the 90's as in "iPhone"; VRBrain, FPVBrain.....no "brain"; just stupidity in not being able to be innovate for…"
Dec 24, 2014
thomas Butler replied to George Sugden's discussion ADVICE on Roof surveying
"Been there done that! You might want to watch my video  inspecting a new roof job on my house. All of the copter details are in the comment section.  I used a Nikon s3100 (which can record in HD, but this video is not ), but I would have…"
Dec 16, 2014
thomas Butler commented on DynexHobby's blog post Multirotor vibration
"I think this is the first time I've seen a DIYDrones blog post with no responses in more than three days! I'm not surprised on this one, so I'll do the whining on this one!   The post is a soft sell for a "vibration"…"
Dec 14, 2014
thomas Butler commented on Visual Micro's blog post New - Microsoft Visual Studio 2013 Community Edition (free)
"OK well NOW it works, and it's a big improvement over using just the original Arduino IDE. Now I'm sold! This blog post is for the most part about building ArduPilot code using Atmel/Visual Studio and Visual Micro's add-on. The AP…"
Dec 8, 2014
thomas Butler commented on Visual Micro's blog post New - Microsoft Visual Studio 2013 Community Edition (free)
"@VisualMicro, It's because of the hokey way the Arduino IDE deals with the so called user "libraries" which are not actually libraries, but are instead shared source files.  The Arduino IDE scheme therefore makes the…"
Dec 7, 2014
thomas Butler commented on Visual Micro's blog post New - Microsoft Visual Studio 2013 Community Edition (free)
"It works! Crius All-In-One Compiling and Uploading MegaPirate (ArduCopter 3.1)  with Atmel Studio 6.1 using VisualMicro addon (probably should be a separate blog post). Build MegaPirate version 3.1.5r2 (at MegaPirateNG ) of ArduCopter…"
Dec 6, 2014
thomas Butler replied to Ankur Mohan's discussion Using the MPU6050 for Quadcopter Orientation Control
"Hey Ankur, I seriously doubt you really looked "long and hard"! Come on!  See this recent blog post on compiling in VisualStudio for ArduPilot which might open your eyes. As a friendly suggestion, you would be better off…"
Dec 4, 2014
thomas Butler commented on Visual Micro's blog post New - Microsoft Visual Studio 2013 Community Edition (free)
"Yawnnnnn!!! If there were a plugin for the STM32 which allowed building the ArduPilot code for STM32 based flight controllers, then this MIGHT be interesting, or for any STM32 based project!"
Dec 1, 2014
Jake Stew commented on thomas Butler's blog post What bearings for my multi-rotor copter motor?
"That's kind of what I was wondering about. Has anybody actually flown long enough without crashing to say that the bearing life is too short? What I mean is that even a small crash could chip or dent a bearing or race, which would lead to early…"
Nov 27, 2014

Profile Information

Please tell us a bit about your UAV interest
aerial photography
Hometown:
chicago,illinois

Thomas Butler's Blog

What bearings for my multi-rotor copter motor?

Posted on November 21, 2014 at 1:41pm 13 Comments

What bearings in copter motors?  The type of bearing is a “deep groove” ball bearing.  

 

The axial load (applied force is parallel to motor shaft) placed on the motor is no different than…

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Are you still "puffing" LiPos?

Posted on July 20, 2014 at 11:30am 11 Comments

This is a compendium of information on LiPos.  At this point in the UAV/multicopter game users should not be damaging their LiPos. That is just giving away money to the battery manufacturers. A few simple rules will help the LiPo last a long time. 

 

Please feel free to add or correct…

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Super simple and compact quadcopter power distribution module

Posted on November 28, 2013 at 7:00am 13 Comments

I'm amazed how complicated some of the designs are for the power distribution of a quadcopter so I made my own. 

To monitor current put the sensor between the power source and one ESC in order to get a value that can be multiplied to calculate…

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