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Old Jan 25, 2013, 03:00 PM
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Quote:
Originally Posted by Donnyv View Post
http://youtu.be/sCdnJhsJqD4

I love this kk2 board!
DonnyV, excellent video.

Very kind of you in give us the PI settings.

It would be great if you could tell us the the KV of the motors, the propellers size, the distances between motors and the AUW....

Thank you very much in advance.
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Old Jan 25, 2013, 04:02 PM
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United States, MI, Morrice
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Quote:
Originally Posted by theothercliff View Post
I imagine that drift of any sort is usually one of two things:
- gyros not calibrated properly, this could come from moving the copter while the gyros are initializing / calibrating
- not enough "I" gain

Let us know what fixed it so that we can pass info along. (This goes for all problems. )

Also, I can imagine that the unequal length of your arms could result in different power applied for leveling which might be fighting the yawing.

Also, also, ideally you would measure all the motor distances and angles from the CG and use some trig to come up with slightly different numbers to go into the mixer editor.
I did calibrate the ESC's with no noticable difference, but after I went to bed I realized that the power wires on the M2 to M4 ESC's were not connected. Does this matter? If not, my next step is to increase the I gain.
Stock settings were used after the 1.5 flash. I did try to increase the I gain on 1.2 but no luck there either.
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Old Jan 25, 2013, 04:06 PM
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United States, MI, Morrice
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I just mounted it were it looked like it was built to go. It flys nicely with the cg centered on the board. My only problem is the yaw drift. I hopefully will have this figured out this weekend.
Quote:
Originally Posted by jonesy40001 View Post
This is the alternative as mentioned, i.e. center of lift (not a lot of difference). If it is nose heavy it will nose down when you gas it straight up and vise versa for tail heavy.
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Old Jan 25, 2013, 05:02 PM
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United States, CA, Hayward
Joined Oct 2010
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...y4 #@##$

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Originally Posted by RC911 View Post
Forget about Y4. Yaw authority is horrible.
Same here ! Y4 yaw is slower than a snail...build a v-tail or Y6 instead...just a suggestion.Happy wkend !
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Old Jan 25, 2013, 05:33 PM
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Australia, QLD, Meadowbrook
Joined Sep 2012
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Quote:
Originally Posted by theothercliff View Post
A wild guess is that you don't have enough "I" gain on yaw. That is exactly what "I" gain is for.
Yes. And dont forget the limits. It is my understanding the limit controls the percentage of power dedicated to each function. If anyone can explain exactly what it does I would love to hear it. On my first quad I had these issues, as well as the climb and descend when yawing. High P,I and limit on the yaw function will help cure the issue if it is not a physical problem. Increase all until it starts to climb when yawing and then back them off a little also increase stick scaling on yaw as well. You probably wont get any yaw oscilation from High "P" gain, when the "I" gets too high you may notice the 2 of the motors rev quite high when you resease the rudder stick and the quad will climb a little. If the quad climbs quickly when yawing, the limit may be a little too high. Give that a crack and let us know how you go.

Pete.
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Old Jan 25, 2013, 05:58 PM
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Australia, QLD, Meadowbrook
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Rain, rain and more rain

Pretty much at the time I turned my Tx on yesterday it started raining. I would be happy to swap our weather for a little snow, any of you yanks got some spare?
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Old Jan 25, 2013, 07:23 PM
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Originally Posted by jonesy40001 View Post
Pretty much at the time I turned my Tx on yesterday it started raining. I would be happy to swap our weather for a little snow, any of you yanks got some spare?
you guy's down there if it ain't burning yur drowning.
8 pack day here on the left coast of Canada
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Old Jan 25, 2013, 07:31 PM
efx
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I guess we need a flying submarine...lol

Quote:
Originally Posted by jonesy40001 View Post
Pretty much at the time I turned my Tx on yesterday it started raining. I would be happy to swap our weather for a little snow, any of you yanks got some spare?
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Old Jan 25, 2013, 07:53 PM
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Australia, QLD, Meadowbrook
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Its a long weekend here too..... i am so bored. everything is tuned and ready to fly. had to give the credit card to the wife so it doesn't become an expensive long weekend and yep... at least the rain put the fires out for now.... just had a thought, wonder if I can wrap the quad in cling film ?? would be like a red neck flying sub.. lol
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Old Jan 25, 2013, 08:28 PM
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United States, OK, Tulsa
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Quote:
Originally Posted by jonesy40001 View Post
Pretty much at the time I turned my Tx on yesterday it started raining. I would be happy to swap our weather for a little snow, any of you yanks got some spare?
Been really dry here for the past couple of months.
Sounds like you guys down under need to buy an Aquacopter.

http://aquacopters.gostorego.com/
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Old Jan 25, 2013, 09:10 PM
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USA, IL, Tinley Park
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Wher can I get information on how to modify the program for the kk2 or is there anybody that knows jow to write code that would like to embark on a project that I think would be cool. let me know we can pm or email and discuss my ideas and see how possible they are.
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Old Jan 25, 2013, 09:22 PM
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United States, NY, Albany
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Source code is in the zip file with the firmware, AVR Studio 6 can be downloaded for free. Code isn't straight forward, but it's not something that can't be understood with the right background and a little but of time. If you want to briefly explain you idea there are a number here that could tell you if it hold water.
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Old Jan 26, 2013, 02:52 AM
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Quote:
Originally Posted by thwaitm View Post
Sounds like you might have three props of one type and 1 of the other...

err... vibrations? Got any of them?
What are your YAW PID settings (i.e. all of them)?
You've checked the tracking on your props? all good?

Not sure it makes a difference on KK2 but in your TX what's your gyro set to? above half way or below half way... (not that I think my KK2 actually cares about rate or HH modes like a heli does).
My Yaw P Settings are 90 ,P limit is 100 , I is 0,
All the props have come from the same pack of props as it is...
what is the tracking on my props????...
I have somewhat solved the problem of the inadvertent yaw by using trims ,But now I have a problem with the quad gaining height when I apply yaw control using my sticks...when I yaw to the right the quad gains height but when I try to yaw keft It does not ...all it does is nicely yaw to the left...what I see here is the natural tendency of the craft to yaw to the left....I tried to decrease the stick sensitivity on the yaw axis and this again solved this problem somehow, but then yawing to the right became very difficult.... I thought some pro users here could help me with this problem by suggesting some changes in the mixer editor offset settings....(I used the offset settings to offset the tail servo on my tri-copter to provide better yaw compensation)...but here the situation is different as on a tricopter only the servo is used to control yaw so changing the offset there would help me with the yaw axis ...but on a quad two motors are used at a time to yaw...so I will have to change the offset setting on both of them..So I am experimenting and stumbling....I flashed my esc's with the latest simonk release(2012 -09-10)....and then tried to see the difference by flashing the wii-esc firmware...I am yet to derive any conclusions from these tests...so i will most probably post a video illustrating my problems..........
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Last edited by Akcopter; Jan 26, 2013 at 03:03 AM.
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Old Jan 26, 2013, 02:55 AM
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Quote:
Originally Posted by theothercliff View Post
A wild guess is that you don't have enough "I" gain on yaw. That is exactly what "I" gain is for.
Thanks
I will try that cliff...
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Old Jan 26, 2013, 03:55 AM
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Australia, TAS, Memana
Joined Aug 2004
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Quote:
Originally Posted by Akcopter View Post
All the props have come from the same pack of props as it is...
...
Umm... you do have CW and CCW propellers ... right???
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