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Other › Is trimming needed at all to hover a Quad?
01-27-2012 05:40 PM  6 years agoPost 1
jackheli

rrProfessor

Vancouver - Canada

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Hi,

when I hover my Quad I notice I have to apply quit a bit of trim on pitch and yaw.

Is that normal? or maybe the gains are too low? or even the Quad wasn't stable when the board was initialized?

I'm just starting so I just wonder what is going on.

Thanks.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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01-27-2012 05:50 PM  6 years agoPost 2
eppler

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Baytown, TX

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If you can make it change direction you will need to trim it.

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01-27-2012 05:57 PM  6 years agoPost 3
jackheli

rrProfessor

Vancouver - Canada

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If you can make it change direction you will need to trim it.
sorry, could you elaborate on that? Didn't quite understand what it means.

Pretty much a newb on quads here.

Thanks.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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01-27-2012 06:36 PM  6 years agoPost 4
Dr.Tim

rrElite Veteran

Mojave Desert

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Hello Jack, What type of Quad do you have? What Controller? Some Controllers do not hold as well as others .. In most cases it's about balancing the quad itself. When I was flying the FY91Q I had to add small weights to the arms to balance it for flight. (1 or 2 gram pieces of lead) I kept adding weight until the quad hovered in one spot.
Also check to make sure all trims are centered even Sub-Trims ...
Dr.Tim

From Simple minds come simple ideas! Approach Engineering

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01-27-2012 06:47 PM  6 years agoPost 5
jackheli

rrProfessor

Vancouver - Canada

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This is embarrassing... but I figured I wanted to start with something really simple and cheap to see how it goes and learn a bit without being too worried about the thing itself.

I have a KK board which I have no idea what version of the firmware I have flashed in, on a HK crappy wood frame...

I am searching for a newer version of the firmware to see if it helps.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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01-27-2012 08:27 PM  6 years agoPost 6
v22chap

rrKey Veteran

Granger, Indiana

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Jack
There is another forum that covers the KK really well and you probably would have more help with it over there .
Good luck with your project

Larry C ----------Bergen R/C helicopters

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01-27-2012 11:09 PM  6 years agoPost 7
VKGT

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Sanford, NC

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I agree with the above post.. there is another resource for tuning and tweaking your quad. Post some pics! Are you using the inexpensive HK frame? They have another new one that has shown up that may be a more rigid frame for your setup if you are interested.

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01-27-2012 11:22 PM  6 years agoPost 8
jackheli

rrProfessor

Vancouver - Canada

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Check my first hover attempt... One of the escs wasn't working very well with the motor.

Laughs apart, you can see the actual thing...

Now it hovers, but I kind of need to add trim so it stays put...

Watch at YouTube

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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01-27-2012 11:25 PM  6 years agoPost 9
VKGT

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Sanford, NC

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Looks good, except the rollover :P I'm sure you'll get her figured out. I'm glad that you posted the vid because I was curious about the cube cameras.

Which ESCs are you using?

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01-27-2012 11:31 PM  6 years agoPost 10
jackheli

rrProfessor

Vancouver - Canada

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I went through a whole bunch of cheap 18A Escs... they all seem to be the same exact one, no matter which flavour you pick (They are the same exact physical size, all come with the same one page manual and more or less the same bumps on the shrink wrap)

hobby king
HobbyWing
Exceed
Dynam

and some other unbranded...

I ended up changing the timing to mid and after a small stutter all motors settled in nicely.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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01-30-2012 04:56 PM  6 years agoPost 11
smartguy

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Corona, CA

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01-31-2012 04:49 PM  6 years agoPost 12
HansAuf

rrApprentice

Gainesville, Florida, USA

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jackheli - On a KK board controlled multirotor you are going to have some drift that you will never be able to trim out. If you are looking for a "hands-off" hover you will need to have the quad balanced perfectly, props balanced, and gains set just right for your setup. Do a google search for "string balancing quadcopter" and you will find a good method of doing the balancing. I have had several KK's and was able to get them to hands off hover, but I can assure you it won't do it for long. Some higher end controllers are able to come pretty close to not needing any trim type adjustments, but many outside factors can affect the drift of a multirotor. Unless the controller has GPS position hold you'd be hard pressed to get it perfect. Also, with a quad/multirotor, unless you are doing AP work, a hover is only momentary anyway. Most of your time is spent in forward/backward/lateral flight.

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02-02-2012 03:25 AM  6 years agoPost 13
smartguy

rrVeteran

Corona, CA

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My quadcopter video
Just took it today, flew this quad three times and still adjusting it for that perfect flight.

Watch at YouTube

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02-07-2012 09:58 PM  6 years agoPost 14
VKGT

rrElite Veteran

Sanford, NC

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Nice! I need one like yours.... I'm new at this quad thing though and am started with a RotorConcept quad that I didn't have to build, setup or tweak.

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02-08-2012 06:01 PM  6 years agoPost 15
smartguy

rrVeteran

Corona, CA

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They are easy to set-up and pretty cheap to build. (cheap to crash) I would say they fly like helis but cannot fly inverted, much more stable like a flybarless set-up.

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02-09-2012 11:17 PM  6 years agoPost 16
jackheli

rrProfessor

Vancouver - Canada

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HansAuf: thanks for the post.

Smartguy: What frame/motor/esc/controler are you using?

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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02-09-2012 11:48 PM  6 years agoPost 17
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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I can get mine to hover hands free for only a second or two. Any wind, even if you can't feel it will make it drift. See my vids in gallery, third one down.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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02-12-2012 07:51 PM  6 years agoPost 18
smartguy

rrVeteran

Corona, CA

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Jackhill

Click on the upper tab on the video and goto the youtube site and watch the video, on the site you will see the full description on items used.

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02-13-2012 11:00 PM  6 years agoPost 19
jackheli

rrProfessor

Vancouver - Canada

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Smartguy:

Could you post a link to the Acro Firmware?

That would be much appreciated.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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02-14-2012 06:04 PM  6 years agoPost 20
smartguy

rrVeteran

Corona, CA

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You have to read through the thread, its in there.

http://www.rcgroups.com/forums/showthread.php?t=1458663

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