About two weeks ago I purchased six KDE 4215 motors w/ 15'' duals props, and KDE 55+ XF ESC's, and yes I am running a UBEC because of the isolated ESC's. UBEC is running to main out port 7 & 8 on the servo rail. I purchased these after seeing and flying them at Inter drone this year. I fly a DJI S900 with Pixhawk. Made the decision to get away from as much DJI hardware as I could, with the exception of the frame.
WHAT I"M FLYING:
- DJI S900 (Frame only)
- KDE 4215 Motors
- KDE 55+ A XF ESC's
- KDE UBEC
- KDE 15' dual props
- Spektrum DX7 RC w/ satelite
- Neo 7 GPS / 3DR Ublox
- Max Amps 120C 9,000 mah 22.2V x 2
1.) Once armed, the motors will not spin up until given throttle input. Even when I do give throttle input, if I go all the way down on throttle, the motor spin down completely, it like being in stabilize mode, even though I have it set to Loiter mode.
2.)Once armed and given throttle input the KDE motors seem to spin at different rates, some motors are a little faster and some are a little slower. Also, motor number six will not come online until around 50% throttle, and when it does it's spinning much slower then the other 5 motors.
EFFORTS I HAVE MADE TO RESOLVE:
I have done everything that I found on this and other forums with no luck yet
: properly set RC_MIN /MID/MAX 1100 -1520 -1900
: Integrate UBEC to run KDE ESC's
WHY THIS IS KIND OF WEIRD:
When I am connected through MP and run a motor test (Test all motors), all of them fire perfectly, but as soon as I have to fly through RC input, the issues appear.
There are quiet a few other headaches that I had to work through during this build, but I was able to resolve all of them myself, this one just seems to be a little beyond me presently. It seems that a lot of people using Pixhawk have
had issues with ESC, and it seems like almost anyone that buys KDE ESC's has had issues running on Pixhawk. I hope that I can get some advice from anyone who is willing to help, and that this discussion will help others that are experiencing similar issues, not to mention keeping them out of trouble with the Mrs. for constantly burning money.