Motors stop

Hello everybody,

I am just moving from multiwii to ArduCopter. My quad is flying fine but, at some random moment, the motors just stop for about 0.5second and start again (so, it seems the board isn't reset).

I am equiped with RC timer 30 amp ESC. They worked fine with multiwii. The board is powered by a UBEC. Any idea what to check to debug this problem ?

I'm quite sure it isn't a ESC problem so I would like to power it using one ESC (although the UBEC was OK for multiwii board)  but can I keep the +5v from every ESC or do I need to connect only one ?

One more question : With the multiwii , it is possible to define a minimum PWM to send to the ESC, to ensure they won't stop. It is possible to do the same with Arducopter ? I saw the THR_MIN but I don't understand it  (default = 130, unit = percent ? what does this mean?)

Thanks for your help.

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • I believe using multiple non switch mode BEC's is OK.

    Is there no information provided on your questions in the Wiki manual?

  • Did you solve your problem? Main copter has same symptoms. One motor is dropping his power. Motors, ESC is directly soldered to wires (triple checked), no bullets. 

    Main configuration is 15x5.5 props, quad copter, skywalker esc 40a, hengli w48-22 kv 690. 

  • I'm facing a similar problem. My motors flickers every few seconds. They run normally then slow down for some milliseconds and back up. I have no clue... it could be ESC desynchronizing or something similar.

    I gave a bit of throttle and held the helicopter in my hands more or less stable (no big changes in pitch and roll) and faced this problem.

    Attached is the log and here a simple screenshot in case someone can understand this behaviour..

    3692506750?profile=original

    2012-09-15 17-04 1.log

  • I am chasing this very problem at the moment with the 2.7.3 on an APM1, which I am assuming is a hardware fault I can't seem to find.

    Very 'twitchy' motors, and randomly chopping the throttle for about .5 seconds. If you have enough height it corrects itself.

    Also a 20deg roll to the right.

    l.ploumen does all of this sound relate to your setup?

    I have to add that 2.7.3 is doing a great job of holding everything together, in position hold it corrects the roll, in alt hold it only drifts +/- 1m.

  • Developer

    Sounds like a wire from the radio is broken and intermittent. If you had a Flash log I could tell you more.

    130 is 13% throttle. 

    Jason

This reply was deleted.

Activity

Gremsy liked Gremsy's profile
Mar 12
DIY Robocars via Twitter
RT @chr1sa: Donkeycar 4.4 released with tons of new features, including path learning (useful with GPS outdoors), better Web and Lidar supp…
Nov 27, 2022
DIY Robocars via Twitter
RT @NXP: We are already biting our nails in anticipation of the #NXPCupEMEA challenge! 😉 Did you know there are great cash prizes to be won…
Nov 24, 2022
DIY Robocars via Twitter
RT @gclue_akira: レースまであと3日。今回のコースは激ムズかも。あと一歩 #jetracer https://t.co/GKcEjImQ3t
Nov 24, 2022
DIY Robocars via Twitter
UC Berkeley's DIY robocar program https://roar.berkeley.edu/
Nov 24, 2022
DIY Robocars via Twitter
RT @chr1sa: The next @DIYRobocars autonomous car race at @circuitlaunch will be on Sat, Dec 10. Thrills, spills and a Brazilian BBQ. Fun…
Nov 24, 2022
DIY Robocars via Twitter
RT @arthiak_tc: Donkey car platform ... Still training uses behavioral cloning #TCXpo #diyrobocar @OttawaAVGroup https://t.co/PHBYwlFlnE
Nov 20, 2022
DIY Robocars via Twitter
RT @emurmur77: Points for style. @donkeycar racing in @diyrobocars at @UCSDJacobs thanks @chr1sa for taking the video. https://t.co/Y2hMyj1…
Nov 20, 2022
DIY Robocars via Twitter
RT @SmallpixelCar: Going to @diyrobocars race at @UCSDJacobs https://t.co/Rrf9vDJ8TJ
Nov 8, 2022
DIY Robocars via Twitter
RT @SmallpixelCar: Race @diyrobocars at @UCSDJacobs thanks @chr1sa for taking the video. https://t.co/kK686Hb9Ej
Nov 8, 2022
DIY Robocars via Twitter
RT @PiWarsRobotics: Presenting: the Hacky Racers Robotic Racing Series in collaboration with #PiWars. Find out more and register your inter…
Oct 23, 2022
DIY Robocars via Twitter
RT @Hacky_Racers: There will be three classes at this event: A4, A2, and Hacky Racer! A4 and A2 are based around UK paper sizing and existi…
Oct 23, 2022
DIY Robocars via Twitter
Oct 23, 2022
DIY Robocars via Twitter
Oct 19, 2022
DIY Robocars via Twitter
Oct 18, 2022
DIY Robocars via Twitter
RT @NeaveEng: Calling all UK based folks interested in @diyrobocars, @f1tenth, @donkey_car, and similar robot racing competitions! @hacky_r…
Oct 13, 2022
More…