NAZA-H nodding in ATTI mode

[superwhite]

Hi,

I noticed that my 450 heli with naza-h is pitching up and down in atti & gps mode. First I tough the autopilot gain is too high. When I degrease the gain, this behavior is still there except that the frequency is lower. Down to the minimum gain(40%) it will pitch up & down slowly. When I move forward it is not noticeable but once I stop it will come back.

As far as I can see from my eyes, this heli doesnt has any vibration & blade tracking has been done. Is the any setting to make this behavior go away or at lease to minimize it? This heli is fitted with dfc head & I found out that the rubber dampers in the head aren't actually rubber, they feel more like hard plastics. Could this be the reason? Thanks.

[Valkman]

What cyclic servos are you using? They may be too slow to react quick enough.

[superwhite]

I'm using Corona Digital Servo 2.2kg / 12.5g / .11sec from hobbyking. In manual mode it doesn't act like that, only in atti mode & gps mode.

[Tahoe Ed]

In ATTI and GPS is when the FC is controlling the heli. The FC requires a higher level of control than you on the sticks. Buy some high quality servos if you want to use a FC that is capable of a high level of control. If not, then the Naza H is probably not the FC for you.

[superwhite]

Do you think Align DS415M servos are acceptable for the job? Below are the spec -

●Stall torque:2.0kg.cm(4.8V)
2.4kg.cm(6.0V)
●Motion speed:0.1sec/60°(4.8V)
0.08sec/60°(6.0V)
●Rating voltageC 4.8-6.0V
●Temperature range:-20°C~+60°C
●Dimension:22.9 x 12 x 25.8mm
●Weight:13.9g
●1520μs standard band

With corona servos I just use 5v from the ESC because I'm not too confident the servos can take 6v. I think changing the servo also will give me the benefit of the included DJI BEC at 5.8v.

[Tahoe Ed]

I don't fly a 450. So I cannot comment on these particular servos performance. All I can say get the best servos that you can afford for using a FBL controller that is capable of GPS and ATTI.

[superwhite]

Just want to update on my problem. So, i replaced the cyclic servos with align ds415m & rudder servo with ds425m. I installed dji bec & use 5.8v. Now the heli just fly perfect.

[Tahoe Ed]

Great!