Replies to This Discussion

Permalink Reply by Rui Manuel Cravo Marques on March 10, 2012 at 9:40am

Same here but using APM1 1600gr quad 930kv 216w motors 12x3.8sf apc props beedrones quad alum frame. I did a small test flight, windy conditions (20-30km/h with 40km/h gusts). Yaw goes to either one side or the other when fliying front or back straight line. However, after a while straightens (if I stop), it also looked like as if it was flying in simple mode (going front pitch, yaw diplaced about 5 / 10º but the orientation remained in straight line). Alt hold (baro only) is much worse than before. I had a pretty stable alt hold in loiter with previous version settings. Loiter was no good at all looking like a frog jumping. Where the LOITER RATE gains changed ? I was using Marco's params since they used to be very identical, but I'll start from default and try to tune it the best I can (it would be cool if the wind stopped). 

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DeveloperPermalink Reply by Marco Robustini on March 10, 2012 at 10:59am

Cool, i'm happy to read your reports because are in line with mine.
Please always declared your "FRAME_TYPE", i need to know if this yaw bouncing/drift is present and tangible in hexa/y6/octo frame.

Thanks you!

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Permalink Reply by Rui Manuel Cravo Marques on March 10, 2012 at 11:44am

Oh sorry I forgot that. I use X frame with about 60cms motor to motor (diagonal).

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DeveloperPermalink Reply by Marco Robustini on March 10, 2012 at 11:34am

For your future test with latest git i've posted here try to put this line in the config and give me your impression:

// default RC speed in Hz if INSTANT_PWM is not used
#define RC_FAST_SPEED 490

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Permalink Reply by Lance on March 10, 2012 at 12:17pm

I am having an issue with motors not in sync powerwise. there is half a stick worth of difference.If someone can help I would be most apreciative. my mail is lanceshipley42@gmail.com if you can. ps. Idont believe it is a 2.4 issue but I am using it so thought i could sneak in....

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DeveloperPermalink Reply by Adam Rivera on March 10, 2012 at 12:34pm

Lance: Make sure your motors are connected properly per the wiki and the props are all in the right direction. Also, have you run the setup through the mission planner and configured your radio? Have you configured your ESCs?

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Permalink Reply by Lance on March 10, 2012 at 2:14pm

all is conected properly, i have configured the esc and in cli the motor test returns 2 motors only.

I have spent hours on radio(er9x) and pid to no avail. I am using arducopter + form. I have spent over a week on this having poured over the wiki and even other projects. i have tried a usb gamepad and the same thing hapens. manually setup each esc (turnigy sentry 40a) direct from rc and set them up in concert via apm2. ive reloaded firmware and been thru many updates of software. I know its got to be something simple like im in heli mode instead of plane or something on the apm and dont mind doing the research, just cant find any simmilar issue on the net. I have a single replacement esc that I have swaped for each in the rig and same effect. I believe I have narrowed it to the apm board(programmatic of course, diy makes great stuff). hope you see something in this.

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Permalink Reply by Lance on March 10, 2012 at 6:46pm

it took a few tries but finally worked after a multi esc sync. possibly just a glitch. there was also a timing setting on my esc's that was changed from med to high. Thank you for the help in pointing me!

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Permalink Reply by Lance on March 10, 2012 at 2:15pm

P.S. Thank you!!

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Permalink Reply by Rui Manuel Cravo Marques on March 10, 2012 at 4:03pm

Hi Marco. I've made that change and re uploaded the firmware. First thing I noticed, I liked more the "sound" of the motors. Seem smoother, and I believe I'm having softer reactions. To be completely honest, I must wait for a windless day, or I won't know if are the gusts affecting the reactions of the quad, but I got a bit "scared" with your settings and default settings (I lowered RATE P before fliying, 140 seemed too much and I was right) I had some agressive reactions I was not expecting. Still trying to tune LOITER, but with wind, I don't know what's doing what, so I'll wait for better conditions to make a real judgement. One thing I really didn't like compared to previous version was the alt hold. I noticed the values I have after a flight are completelly different from what I start with, and I think it might "be learning" what's the best value to hold alt, once again, wind may affect this by generating sudden pressure drops or pressure hights. So I will wait to make a more fair test. Nevertheless, I would like to thank all the team that has been doing a great effort to improve our flying experiences and correct some bugs, as well as to the test crew that puts their ships to in the air risking it so that we can fly safe. Thank you all.

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Permalink Reply by Fred on March 10, 2012 at 1:47pm

Hi Folks,

yesterday i had a quite weird experience.

Got a Homemade Octo with APM 1 and 2.41 firmware.As i wrote before, i´m using a cam gimbal and had sort of brown outs in lack of power.So i got a 5 amps ubec, which i fitted to my frame.Nice flying,quite stable.

But yesterday, out of a sudden all motors cut of in flight and it dropped down like a stone.

When i reached the Octo, about 20 secs later,i accidently touched the throttle stick,all motors working.......

I already checked all Cables,no problems.

After checking the inflight video,no abnormal sounds ,just silence.

So i ain´t got the fainthest clue what happend.

Any ideas ???

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Permalink Reply by Lance on March 10, 2012 at 2:25pm

noob here but I seem to recall a similar story sans ubec, in which a separate power supply for the board was the solution. It may be worth a search until someone with real knowledge can advise.

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