arducopter pid for 2830-13 850KV

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hi..
im usgin ardumega128
using ardupirates 
and i have test :
1. i try using motor 2409gold 1000k + propb 9050 3blade it's ok
2. i try using motor  hexTronik DT750+ propb 12x4.5  2blade it's ok

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=6247


but when i'm using 2830-13 850KV(from rctimer)

and try using prop 9050 3blade,10x4 2blade,10x6 2blade the QC is have big 
osilation.

and i don't change the program and setting for the 3 motor.

any body can help for my problem?
thank
jeny

Original issue reported on code.google.com by [email protected] on 15 Jun 2011 at 4:43

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i'm using standar PID for all motor

Original comment by [email protected] on 15 Jun 2011 at 4:51

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I had yesterday few test flights with the same motors (2830-13 from rctimer) 
using EPP 10x4,5 props (those required lots of balancing). With default PID 
settings there was some oscillation but it didn't increase itself so it was 
somewhat flyable. My ESCs (30 amp from rctimer too) are set for medium timing 
but I've seen some post suggest that using high timing could help with some 
oscillation issues.

Check the balance of those props and try to change the timing if that would 
help. If you are using the bullet style prop locks then check that those are 
propely in place.

The frame I'm using can be seen here: http://humdi.net/quadcopter/

Original comment by [email protected] on 19 Jul 2011 at 2:13