Why does my gimbal suck? (3S vs 4S question)

[Silverburn]

God, these things are frustrating.

I'm having all the usual problems...

1. Lag on aggressive roll
2. Lag and jitters on pitch, regardless of pitch inputs
3. Bounce on yaw (APM yaw PID related, not gimbal related)
4. Jitters on roll in fast flight
5. Horizon lag on aggressive yaw

Sample (you don't need to watch all of it to see the problems - but starting from 5.50 in is best):

I have almost got roll in a good position with a high power (180) and high PID (25/0.03/30) setting. But pitch is refusing to settle without vibrations.

So, what should I do? Would a move to 4S help? Or a move to 32bit? I've got a 3 axis upgrade planned for the winter.

My setup:
Alexmos 8bit on 12v BEC + choke
FC inputs and autotuned
Quadframe V2 BLGC (balanced)
Nex5r + 18-55

 

[RyanMcCrae]

I've switched to 32bit from 8 bit, night and day difference, the new filters set up is great, really helps you get much higher PIDs.

 

[kloner]

do you have the right pole counts in the alexmos gui?

if your tilt shakes, lower the motor power or balance it better. eventualy you will hit a spot between shake and not breaking away. if not, needs a bigger motor on that axis

You are up around where 4s starts working better

Don't you just love that dirty sensor on them nex cameras? That's what pushed us on after a very short stint trying to fly those. the lens is not sealed so the sensor gets wiped out. gotta really pay attention to where you take off and land