by LPR » Sat Dec 08, 2012 9:55 pm
If your using default rate and angle PIDs and you are not having any wobble then you must have vibrations under control.
I had problems with up and down movement when I tried moving the AQ board off center 8 inches. My octo would jump up 2 meters when I did a quick stop. It drops when i would take off too. The AQ must use the z acc to help altitude hold. Where the center of gravity for your quad is could be causing some altitude change. I you still don't have a camera mount you could add some weight and get your throttle factor to need to be .5. I your quad is over powered compared to an average quad that could be something to do with your control difficulties.
I set the throttle factor so I could change from manual mode to position hold without a jump up or down.
I can't remember if I messed with PIDs for alt hold but I don't think I had to if I had defaults for rate and angle PIDs.
Lower rate D makes attitude changes faster. At 4500 my octo starts to wobble a little and at default it is too slow to fly aggressively in alt hold. 5800 is good.
Keep making little changes and look for little changes. Don't mess with the rate and angles PIDs except for rate D.
I've only built an octo but I'm starting on two quads now. What you find might be different but if a big octo flies well with defaults I would not think a quad would be too far off defaults.
When you get it right the AQ is amazing.
Larry
Last edited by
LPR on Mon Dec 10, 2012 5:59 pm, edited 1 time in total.