Replies to This Discussion

Permalink Reply by James Roney on July 2, 2012 at 12:40am

Morning,

I find that members very seldom respond to Loiter PID type settings.  I feel like either its be biggest secret ever and no one wants to share or alternativly members are not quite sure how they got their loiter as tight as they did as so don't really want to put their ideas out there.

My loiter is setup and stays in a 5x5m box, but when I posed the question with a relevant amount of details and even bumped my topic there were no responses...

 

Would be nice if someone could assist with these types of questions.  Please see my post here.

http://www.diydrones.com/forum/topics/assistance-with-loiter?commen...

 

Good luck.

 

James

 

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Permalink Reply by Michael Müller on July 2, 2012 at 5:41am

Do you know this? There you can simulate different wind speeds to find the best PIDs.

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Permalink Reply by James Roney on July 2, 2012 at 6:20am

Hi Michael, Thanks for the link. I do know it, however find it hard

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Permalink Reply by Terry Brooks on July 2, 2012 at 7:06am

I saw that but couldn't seem to make use of it properly

Didn't seem to matter what gains/enviroment stuff I changed it just behaved the same

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Permalink Reply by Terry Brooks on July 3, 2012 at 3:34am

So anyone ?

Seriously still nobody to answer this ?

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Permalink Reply by Mike Boland on July 3, 2012 at 4:00am

I am probably one of many following this thread with interest ?? as I am currently trying to tune a Hexa. 

It is definitely more a black art than a science, as slight changes can have unexpected results.

Today I managed some good flights in a mild breeze (5 to 7 kts) with a loiter of 10m radius, increasing the IMAX while all else remained unchanged.

It is till not as stable as you see about on teh net but that will obviously be an ongoing thing.

So come on everyone, us newbies need the input and sharing, even if yours is not working as expected that may be useful to some of us before we go down that path. 

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Permalink Reply by Terry Brooks on July 4, 2012 at 1:43pm

Wow, no help whatsoever

Such a shame as it's a great piece of kit otherwise

Anyone want to buy a hardly used APM 2 mounted on an X650 frame with Turnigy Plush 25-30a esc's, original XA motors with APC 12 x 3.8 props and a Goodluckbuy 2 axis camera gimbal with servos (plus shutter trigger and servo)

All you'd need is your receiver and battery

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DeveloperPermalink Reply by Andreas M. Antonopoulos on July 4, 2012 at 1:58pm

There's a ton of development work going on in the LOITER settings on 2.6 and beyond. 

So in the recent past all the parameters have changed because the underlying algorithms have changed (improved). That means things are a bit in the air in terms of LOITER. 

Start with the 2.6 defaults and then use jasonshort.com simulator to try different values for tuning LOITER.

Also, a bit of patience doesn't hurt. You asked your question 3 days ago, on a weekend, just before the 4th of July. The whole team is working hard on a number of projects and improvements to the code. LOITER is probably taking up hundreds of dev-hours right now with some tremendous developments going on. A bit of patience will pay of nicely as the code is improving dramatically in all areas. 

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Permalink Reply by Terry Brooks on July 4, 2012 at 2:43pm

Thanks for your reply Andreas

I do appreciate that the dev team are working on things which is great of course

I did try the Jason Short flash program see my response to that suggestion above

Quote:

"I saw that but couldn't seem to make use of it properly

Didn't seem to matter what gains/enviroment stuff I changed it just behaved the same"

As for the 3 days, well it's not the first time I've asked the same question

I would have thought the guys selling the goods would have taken a slightly more active role in helping newer folk getting their systems flying right, if that's not their aim or plan that's fine but it doesn't fit with my aims or plans hence the offer to sell my set up

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DeveloperPermalink Reply by Andreas M. Antonopoulos on July 4, 2012 at 3:58pm

Fair enough! Open source isn't for everyone of for every application.

The people selling the "goods", sell hardware not software. The software is open source and developed by volunteers. The 2.6 version default for ArduCopter already contains the best-known settings for loiter at the moment. Further tuning is really dependent on the vehicle and is really not up to the company that sells the hardware. 

You will probably be happier with a commercial software solution that supports a single vehicle type and has predictable behavior and commercial support (ie, not one that has DIY in the name)

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Permalink Reply by Jeff Smith on July 4, 2012 at 4:43pm

I would encourage you to hang in there, I also have asked some questions that have had no reply on this forum though I am using a traditional heli which is not as popular and therefor less supported, however without anyone to answer me I have had good fortune finding what I need via google and searching for specific terms. After all I did choose this project as a learning exercise...

That being said, if you get really mad and want to toss the APM 2.0 for cheap out of spite shoot me an e-mail, it's got to take less time to show up here in the states than the 5 weeks I waited to get one from the store LOL

drknow65@hotmail.com

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Permalink Reply by Terry Brooks on July 8, 2012 at 4:32am

Arghhhhhhhhh

Had enough now

Upgraded to 2.6 and mav 1.0 and find that I have to re do all the PID stuff

Don't have Xbee or telemetry so it's a very slow process and just can't be bothered

Also discovered during trying to do the PID's with 2.6 that the alt hold has changed and as soon as you click to Loiter you have to very quickly set the throttle to 50% stick otherwise it will fall like a brick and break the landing gear :( not impressed

Anyone in the UK want to buy my APM2 it's £150 plus postage

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