Glenn Hollowell
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  • Homer, Alaska
  • United States Minor Outlying Islands
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Pixhawk automatically lands when battery falls below 25%, followed by vortex ring condition, then crash

Started this discussion. Last reply by Andre K. Oct 8, 2016. 1 Reply

Hey all- I've got Pixhawk set so that when my battery falls below 25%, the aircraft automatically descends and lands. However, when this happens above 20 feet, the aircraft develops vortex ring…Continue

Tags: vortex, stall, helicopter

APM Mission planner v2.

Started this discussion. Last reply by Glenn Hollowell Feb 7, 2016. 4 Replies

APM Planner v2.0.18 installs fine, then crashes when run on a current Win8 machine.Here's the Dr. Ming output:apmplanner2.exe caused an Unknown [0xC000041D] Exception at location 036B5171 in module…Continue

 

Glenn Hollowell's Page

Latest Activity

Glenn Hollowell commented on Murray Spoelstra's blog post Folding Quadcopter for the holidays
"Great design with lots of possibilities. Here is my take with white oak, 1/8" aluminum, epoxy and pool noodles. All up wt w/5000mah4s is 2,150g. Have a nice day."
Mar 29
Glenn Hollowell replied to Glenn Hollowell's discussion Uncontrollable in-flight yaw (it was fine before) in the group PIXHAWK
"Got it. #3 motor had a very slight tilt associated with it, (~2 or 3 degrees) . Swapped this arm with a spare and the problem was resolved."
Mar 25
Glenn Hollowell replied to Glenn Hollowell's discussion Uncontrollable in-flight yaw (it was fine before) in the group PIXHAWK
"In midflight the yaw misbehavior started. Had been running Autotune doing roll axis adjustments. I don't believe that it had progressed to the yaw Autotune.."
Mar 25
Clifton Hipsher replied to Glenn Hollowell's discussion Uncontrollable in-flight yaw (it was fine before) in the group PIXHAWK
"It was fine before what happened?"
Mar 25
Glenn Hollowell added a discussion to the group PIXHAWK
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Uncontrollable in-flight yaw (it was fine before)

I've put together a new scratch build and was running Autotune on it yesterday. Had Autotune OFF at the time. Quad started slowly rotating about the vertical axis while flying. Did a rough, (but not too rough) landing, pulled all motors and re-secured them to to the arms confirming that they were not askew. Tested it and still had the yaw. Calibrated my ESCs, flew it and still had the yaw. Finally swapped in a known good 3DR compass + GPS, then recalibrated compass, accel, and level. Craft…See More
Mar 24
iSkyMaster replied to Glenn Hollowell's discussion Cutting the (+) wire on ESC Pixhawk data leads...is anyone doing this? in the group PIXHAWK
"Your welcome. I wish people explain things in detail so others can benefit from it. My pet peeve is always piece part info :)"
Feb 16

100KM
Hein du Plessis replied to Glenn Hollowell's discussion Cutting the (+) wire on ESC Pixhawk data leads...is anyone doing this? in the group PIXHAWK
"Wow, thanks for this detailed explanation!"
Feb 16
Glenn Hollowell replied to dongre's discussion Quadcopter wont lift off the ground.
"I like to dry-lab before the build using eCalc."
Feb 14
iSkyMaster replied to Glenn Hollowell's discussion Cutting the (+) wire on ESC Pixhawk data leads...is anyone doing this? in the group PIXHAWK
"First, you have to look at the schematic of the PixHawk and get a better understanding of how the power design is done. I am assuming you have a basic electronics understanding. When you are looking the Pixhawk facing towards…"
Feb 8
Clifton Hipsher replied to Glenn Hollowell's discussion Cutting the (+) wire on ESC Pixhawk data leads...is anyone doing this? in the group PIXHAWK
"It also depends on the ESC.  True optically isolated ESCs MUST have the + lead to supply power to the opto isolators.  These ESCs are very rare. For "regular" ESCs you need not worry about ESCs that have a LINEAR BEC.  If…"
Feb 7

100KM
Hein du Plessis replied to Glenn Hollowell's discussion Cutting the (+) wire on ESC Pixhawk data leads...is anyone doing this? in the group PIXHAWK
"For ESCs on multirotors, I don't remove the +, it serves as a nice smooth backup power supply to the PH. For planes, you'll have to go the zener route to protect the PH from the servo's voltage spikes. I keep the servo + on a…"
Feb 7
Glenn Hollowell added a discussion to the group PIXHAWK
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Cutting the (+) wire on ESC Pixhawk data leads...is anyone doing this?

Recently I've come across the suggestion that when you are using the Pixhawk power module, you should snip the (+) wire (middle one) that connects the ESC to the Pixhawk unless you are using a Zener diode in the line to prevent over-voltage. I've got 2 quads with Pixhawks, both have the standard 3DR power module, and both have the (+) wire in the small 3-wire bundle from the ESC unsnipped. I am interested in people's thoughts regarding the merits and risks of leaving this wire unsnipped. Thanks…See More
Feb 6
Glenn Hollowell commented on Aldo Vargas's blog post Drone following a roomba
"Ooooh, nice! Thanks for sharing this. I'm impressed w/the code as well as the Big X platform. It is a nice big technical drone like I wish we'd see more of in the market. Best regards and happy holidays to you and your team!"
Dec 27, 2017
Jerald Thompson replied to Glenn Hollowell's discussion Bad Compass Health in the group PIXHAWK
"I'm running APM 2.8 hardware, Mission Planner 1.3.44 build 1.16240.11550, and ArduCopter V3.2.1 (36b405fb). I have looked through the entire parameter list and cannot find COMPASS_DEV_ID listed there.  Are you perhaps running different…"
Feb 13, 2017
Mauricio García replied to Glenn Hollowell's discussion Bad Compass Health in the group PIXHAWK
"Hi Glenn. Few months ago I experimented some compas troubles, similar to yours. (Look at http://diydrones.com/forum/topics/external-compass-offsets-too-hi-hmc5883l-gps-ublox-neo-m8n) I found that the gps that hast active antenna make…"
Feb 13, 2017
Glenn Hollowell replied to Glenn Hollowell's discussion Bad Compass Health in the group PIXHAWK
"I did just that. Didn't work after installed in the 3DR X4. So then, I swapped in the GPS/compass from the bird that I'd robbed the second Pixhawk from, and you guessed it, everything worked fine. The kicker is that when removing the…"
Feb 13, 2017

Profile Information

About Me:
Like to count fish.
Please tell us a bit about your UAV interest
Want to count fish using drones.
Hometown:
Alaska, (not Anchorage)

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