Christian John
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Attitude Unpredictability on Gusty Days

Started Jul 17 0 Replies

Hi all,I ran into an issue earlier this year when a gusty day pushed my FX-61 (elevon flying wing) into a nosedive and fatal crash.  Happily only the styrofoam was damaged, so I built a new one with…Continue

Tags: gusts, tuning, Mission Planner, Fixed-wing

Uncooperative Pixhawk Calibration Mode

Started this discussion. Last reply by Christian John Jun 1, 2016. 10 Replies

Hello all,I'm a new user so forgive me if I'm a moron for some element of the following question, but my issue is this:  My Pixhawk seems to refuse to enter ESC calibration mode.Background:  I am…Continue

Tags: HELP, Pixhawk, ESC Calibration, ESC

 

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Christian John posted a discussion

Attitude Unpredictability on Gusty Days

Hi all,I ran into an issue earlier this year when a gusty day pushed my FX-61 (elevon flying wing) into a nosedive and fatal crash.  Happily only the styrofoam was damaged, so I built a new one with the guts from that which crashed.  I made a few flights with the new one, and decided to re-autotune in an effort to minimize sinusoidal altitude during mapping missions.  It has been flying well, but today some gusty winds came in and I nearly faced an abrupt and catastrophic end to my field…See More
Jul 17
Christian John replied to Christian John's discussion Uncooperative Pixhawk Calibration Mode
"For anyone who may share the problem I describe above, the solution is a simple one: It was a rookie mistake.  Because the pixhawk has a default two-step arming protocol, you need to be sure to perform BOTH arming actions before you can expect…"
Jun 1, 2016

3D Robotics
Chris Anderson replied to Christian John's discussion Uncooperative Pixhawk Calibration Mode
"No idea, I'm afraid. I don't have a Taranis nor those ESCs and don't know what that means. Perhaps you've got it reversed again and it doesn't want to start up in full-throttle mode?  Or perhaps it's complaining…"
Apr 8, 2016
Christian John replied to Christian John's discussion Uncooperative Pixhawk Calibration Mode
"I tried calibrating the radio in manual mode, with the motor unplugged so I could reverse the throttle setting and recalibrate the transmitter before supplying power to the motor.  After that, I unplugged the battery, replugged in the esc, and…"
Apr 8, 2016

3D Robotics
Chris Anderson replied to Christian John's discussion Uncooperative Pixhawk Calibration Mode
"FBWA *is* an auto mode. Start by setting up in Manual. "
Apr 8, 2016
Christian John replied to Christian John's discussion Uncooperative Pixhawk Calibration Mode
"WOAH.  Reversing the throttle in radio calibration causes the motor to turn on at what seems to be max - but the pixhawk isn't even armed (safety switch still blinking)!!! Plus i'm in FBWA and not auto!!!"
Apr 8, 2016

3D Robotics
Chris Anderson replied to Christian John's discussion Uncooperative Pixhawk Calibration Mode
"Maybe you've got your RC channel reversed? Try reversing it at the RC transmitter level. In manual mode, that should be a direct pass-through to the ESC (after you've pressed the safety switch)"
Apr 8, 2016
Christian John replied to Christian John's discussion Uncooperative Pixhawk Calibration Mode
"Thanks, Chris.  I tried the arming sequence you suggested, still to no avail.  As arming isn't standard across esc's, I looked into my model specifically (HobbyKing 40A SBEC; manual…"
Apr 8, 2016

3D Robotics
Chris Anderson replied to Christian John's discussion Uncooperative Pixhawk Calibration Mode
"Have you armed your ESC? Depending on the make, that might require moving the throttle to full in manual mode, waiting for the beeps, and then dropping it back to the bottom. Then it should be armed.  (This is standard RC stuff, BTW. It's…"
Apr 8, 2016
Christian John replied to Christian John's discussion Uncooperative Pixhawk Calibration Mode
"Oh - well that answers that question; thanks!  In followup, then - my motor is failing to function when the pixhawk is armed and I increase throttle.  MissionPlanner detects the change in the throttle stick, but nothing happens with the…"
Apr 8, 2016

3D Robotics
Chris Anderson replied to Christian John's discussion Uncooperative Pixhawk Calibration Mode
"ESC calibration only works on copters, not planes.  You were looking at the copter wiki manual, not the plane one.  Planes do not require ESC calibration."
Apr 8, 2016
Christian John posted a discussion

Uncooperative Pixhawk Calibration Mode

Hello all,I'm a new user so forgive me if I'm a moron for some element of the following question, but my issue is this:  My Pixhawk seems to refuse to enter ESC calibration mode.Background:  I am building a flying wing UAV for mapping missions.  I am using a PX4 pixhawk with arduplane v3.5.2, with MissionPlanner as the computer interface.  I am using a Taranis Plus with an X8R receiver.  Upon startup of the pixhawk, I immediately get a "no RC receiver" message from mission planner if the unit…See More
Apr 8, 2016

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Please tell us a bit about your UAV interest
Ecological, archaeological, and agricultural mapping
Hometown:
State College

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