After arming my octocopter the motors don't spin. I raise throttle a little and it jumps to very high power. Reaching 50% and motors are screaming near max.
I have tried changing parameters: MOT_SPIN_ARMED parameter.also lowered THR_MAX, THR_MID, THR_MIN with no changes detected.
What can I do to get the motors to run slower under control? It will likely take off violently if I put props on.
Thanks for any advice:)
Replies
Don't know that this is your problem but the PH is rated for up to 4S. Don't know if over voltage ruins it or makes it respond erratically.
Might want to look at this:
http://copter.ardupilot.com/wiki/common-using-a-pixhawk-with-6s-bat...
Well the pixhawk seems to behave normally in other respects and I seem to be making headway.
The powermodule as far as I know is designed to take up to 30v and output at 5.7v I think. Picture attached..
I don't recognize that board I had thought you were using the standard PH 3DR power module shown at the link below.
http://store.3drobotics.com/products/apm-power-module-with-xt60-con...
"Max input voltage: 18V"
Out of ideas; hopefully someone else will chime in.
I have managed to solve it. I think it was just lack of experience. The RPMs in hindsight were not that powerful but seemed like it. I have been used to a F550 with 920kV motors. My new MC is 8x 320kV motors and they were very powerful. I also worked out how to program via APM. If I change throttle values then turn off and back on it makes the changes.
How are you reducing the 6s voltage down to less than the 20V max input for the PH?
I've made progress. THR_MAX, THR_MID, THR_MIN do seem to update after turning on and off.
Also swapped 6s power for 4s which made a big difference but I'll hopefully get more flight time out of 6s if I can configure correctly.