Hi all,
I am currently building a 7-8" quadcopter, and I am having some issues that I just cannot seem to sort out. I have tried seeking some help on multirotor pages on FB, but to no avail.
A little bit about the copter, it is a custom built (3D printed nearly everything in a lab)
it is running a PixRacer mPro R14 auto pilot, with ArduPilot, and a 3s 3000mah lipo battery. I have set the aircraft up with a mixture of Mission Planner and Qground Control.
My problem is, I cannot get this plane to One: Stop drifting everywhere or hold altitude very well, no matter how many times I recal the compass, accel, etc. I fly it in stablize, loiter mode, as well as altitude hold. It seems as tho the throttle curve might be goofy but I am unsure how to fix that. When i throttle up, the plane climbs and I have to throttle down to get it to come back down (as in it keeps climbing and wont just hover, no matter where i sit the throttle) it will usually begin to descend and then I will have to apply more power to get it back up, and then repeat with descend.
Secondly, it has a bad oscillation when it is “somewhat” hovering, almost like each motor is speeding up and slowing down in sequential order. it looks to me like the PID loops may be wonky but, the last time I tried to do the PID auto tune with it, it did not seem to cure the problem at all. At the time, I was using E38 mission planner, and my PID loops all said 0, and were greyed out so that I could not change them. I recently uninstalled e38 and downloaded the newest MP version, and my PID loops are actually changeable and all set at 4.5 currently. So, should I try the auto tune again?
this is my first quad I’ve built myself so I am a bit lost here, I am not new to drones at all but I typically fly a COTS system like a trimble fixed wing, or a DJi or whatever it may be, during autonomous data collection missions.
Thanks in advance!