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ArduPlane User Group

Discussion group for ArduPlane users

Members: 1467
Latest Activity: Feb 28

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PreArm Check Error : Gyros inconsistent

Started by Victor Adrian Toledo. Last reply by Victor Adrian Toledo Feb 28. 2 Replies

Hi guys, I have a Pixhawk from Radiolink and always in every first attempt of armed I get the error "PreArm: Gyro Inconsistent".The most strange thing is that i'm using only the external…Continue

Tags: gyros, prearm, arduplane

ArduPlane 3.4 - can not arm APM with a rudder

Started by Pavel. Last reply by allen baliton Nov 1, 2018. 3 Replies

I am trying to setup and to configure my APM 3.1 mini with FliteTest Blunt Nose Versa flying wing and ArduPlane 3.4 firmware. I have more or less everything connected, setup, configured and working,…Continue

Tags: arming, APM, 3.4, ArduPlane

DSM2 vs DSMX, UART

Started by Rick Kwan Oct 30, 2018. 0 Replies

Hello, I'm new to ArduPilot, but not to computing or open source.  I'm working with a group building a tailsitter with a single pair of props for both hover and horizontal cruise.  (For type of VTOL,…Continue

How to setup ArduPilot for 3-channel fixed wing?

Started by Frederik Borg. Last reply by Martin Bergman Aug 22, 2018. 11 Replies

I seem to only find instructions for 4 channel or "elevon" setups. i have a 3-ch (elevator, rudder, gas) plane and would like to run ardupilot in "stabilize" mode.I have ardupilot 2.5Thanks…Continue

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Comment by Anish on December 1, 2011 at 4:06pm
Castle seems to be better, I do have castle Mamba xl for my "baja ardurover" I haven't tested it yet ....but my test bench gave decent results
Comment by David Long on December 1, 2011 at 3:41pm

I bought a Castle BEC a few months ago and I've been staring at it :) wondering: Is the BEC necessary because the ESC is designed poorly?  Why doesn't someone make an ESC that isolates the motor pulse circuit from the BEC?

Comment by Anish on December 1, 2011 at 11:15am

@David i tend to use BEC's i do admit having doing some analysis and it doesnt look that great. I generally use hobbywing pentium or similiar once for ESC

Comment by David Long on December 1, 2011 at 10:37am

I really am of a mixed on this.  On the one hand, the amount of current that the ESC must supply to run the servos, APM, Rx, and Xbee is trivial compared to the motor's draw.  (This points to quality, not quantity.)  But the fact that longer servo leads causes the APM to send erratic signals makes it seem like power threshholds might be involved.  I guess what I need to do is throw an oscillascope on the leads coming out of the good and bad ESC and find out what's happening. 

Comment by David Long on December 1, 2011 at 10:30am

Warren... Yep, the Xbee is on there too.

Comment by Warren Eather on December 1, 2011 at 12:33am
David, that is interesting! I,ll have try the shortening of aileron cables. Do you have a xbee connected? Maybe the extra cables are acting as an antenna inducing a bit of voltage ripple on the apm.
Comment by David Long on November 30, 2011 at 10:51pm

Warren, I agree with you on the quality of the current being the big factor.  However, capacity comes to mind... when I removed the aileron servos (which together have leads about a meter long) and attached a single lightweight servo with no extensions, the problem vanished.  When I added two or three servo extensions to this "good" servo, the problem reappeared.  Somehow, the added resistance of the long servo leads puts an unworkable load on the APM.  (I fly RC pattern planes and I have noticed that larger ESCs increase servo performance and resolution.)

Comment by Warren Eather on November 30, 2011 at 9:58pm
Hi David, I think your right about a funky ESC being the cause of your issue, but I believe that it's due to the quality of the BEC's regulated 5 volts than the current rating of the ESC. My ESC was suppling a noisy 4.5 volts with similar results that you experienced. I.E. Pulsing servos and intermittent APM rebooting.
Comment by David Long on November 30, 2011 at 9:18pm

I realized something that I should have picked up sooner:  When you install an APM in a model plane that calls for, say, a 30 amp ESC, you may need to increase the size of the ESC.  I was recently getting some strange bugs (servos moving erratically in synch with the blinking GPS LED and the APM resetting spontaneously).  Clue: the problems decreased when I shortened the wing servo leads.  I slept on it and decided that the only thing the GPS, board logic, and all the servos had in common was power.  I put a 60 amp ESC in and, shazaam, no more problems.


T3
Comment by James on November 16, 2011 at 1:13am

Hi Jim, same problem here, iam struggling over a month to make it work.

btw v2.25 is camera ready??

 some screenshot would be extremely helpfull!!!

thanks from me too.

 
 
 

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