I am having major issues with alt hold on my 450 quad copter using the APM 2.6. I have read about vibration issues and have attempted to correct this issue. Here is the list of things I have done…
Tested motor vibration. I see a nice straight line with props off.
Mounted the APM in all 4 corners with a 3/8 square… 2 sided foam tape (one layer and 3 layers / stacked, zeal gel, zeal gel with light strap (zip tie in fuel tubing), added weight to the apm via a large washer and soft foam pads.
Balanced all 4 props on a dubro balancer.
My motors/ ecs / props are the t-motor air gear 350 set. My frame is a aphid 450 (dji flame wheel arms). I have the APM mounted in the center of the upper and lower frames. I checked and the is foam over the barometer.
Copter flys in stabilize mode. Motors pulse in alt hold and in changed altitude violently.
Maybe someone can help me with this? One thing I cant wrap my head around is what is a direct cause of Z axis vibration. motors spin on X/Y. The only thing I can come up with is standing wave or prop thrust buffeting?
Here is my log