Servers by jDrones

PreArm Trim Error

(Pavel) #1

Hello Everyone!
My name is Pavel. I’m beginner. I have some difficulties with my Quadcopter and Pixhawk PX4 PIX 2.4.8 Flight Control. On Miission Planner Flight data screen I have message: “PreArm: RC16 maximum is less than trim”
What does in mean?
What should be done to fix it?
Help me, please. Thank You


(Peter Hall) #2

You can fix this by setting RC16_TRIM to 1500, RC16_MIN to 1000 and RC16_MAX to 2000 in the full parameter list. You will have to do this for any channels above the number of channels your receiver has. This is caused by a mission planner bug in the RC calibration, you also may be able to download the beta mission planner and re-calibrate RC inputs to fix.

(Pavel) #3

Great thanks for such a quick reply. I use version 1.3.62 MP. Which file is Beta?
or ?

(Peter Hall) #4

in your current version, go into the help tab and at the bottom click check for beta updates

ps: the beta is MissonPlannerBeta

(Pavel) #5

Hi, Peter!
Can I use Mission Planner to configure settings of this PDB

(Peter Hall) #6

yes, it gives the amps/volt values and voltage scale here:

(Pavel) #7

Do I need to install ChibiOs when installing the firmware?

(Peter Hall) #8

its recommend to use ChibiOs yeah

(Pavel) #9

Сan I change the direction of rotation of the props through MP and how?

(Peter Hall) #10

no, just swap two wires on the ESC

(Pavel) #11

One more question. My radio is Taranis QX7. I was able to calibrate the sticks through MP, but I can’t calibrate pots and switches. How can I fix it?

(Peter Hall) #12

it will calibrate everything its sent, you will have to setup the switches to output to the receiver in the transmitter firmware first.

(Pavel) #13

Hi, Peter!

Your tips were very helpful to me. But now I have new questions. I find answers to some of them, some don’t.

The EKF value is always red in the Mission Planner. On the Internet, I found several links with a recommendation to disable EKF.

For example:

But in those examples, the interface of the previous versions of the program is used, and in my version I did not find the parameters mentioned. What could You recommend to me?
Thank You