SERVO_BLH_3DMASK makes motors spin 100%

ArduCopter Copter 4.3
1

Greetings.

Having some weird issues with my blheli setup. Everything was working fine yesterday but had to restore settings to default after having some sik radio communications issues.

However today I noticed 2 things happening. After changin motor directions using SERVO_BLH_3DMASK I can no longer test the motors individually. If I choose for example to only test motor B all the motors will spin up at 100 percent regardless of what power percentage is selected in the power window. Its currently on 5 %

This also happens when arming the FC with my remote.

It does not matter what channel I choose the motors also refuses to change direction.

All was working as it should before the reset

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This also happens when arming the c

2

Why not try SERVO_BLH_RVMASK rather than 3DMASK to reverse the motors?

3

I tried that as well and same result.

Even if I untick all the boxes and reboot the motor still spin up to 1000 precent

4

OK i got it wrong. There was still a box tickted in 3dmask so the motor spinning up to 100 percent is now gone.

However the using RVMASK still does not change motor direction

5

I have used RVMASK successfully.

Example values:
SERVO_BLH_RVMASK,1280 = reverse motors 1 and 3 (servo9, servo11)
SERVO_BLH_RVMASK,2560= reverse motors 2 and 4 (servo10, servo12)

6

Do you reboot after you change and if so do you only use MP to reboot or do you disconnect the battery?

7

You need to fully shutdown/reboot the flight controller. So USB and battery need to be disconnected.

8

Nope. Not even with that. Simply refuses.

Going to have to use blheli suit. Now to figure out which motor is represented by which ESC on bl heli :slight_smile:

9

If the reverse bitmask is not working, it’s entirely possible that you aren’t actually using DSHOT at all. Double check your setup from top to bottom.

10

I thought of that too, but the fact that the 3D mask worked, even if it wasnt required, made me believe that DSHOT was working.

1 Like
11

dshot commands (e.g. to reverse) are only accepted if you set SERVO_DSHOT_ESC.
also generally doesn’t work with BLHeli_S ESCs

1 Like
12

Ok I am going to enable that. Maybe its something that I missed. Quick questsion. If I change motor direction in Mission Planner do I only need to do a soft reboot or a hard reboot?

13

Soft reboot should be ok. But the ESCs retain some state so I would hard reboot to be safe

14

Thank you very much Andy. Your suggestion was the magic sauce. FYI i just did a soft reboot and that was enough.

Thank you again