The motor setup is not complete

What ArduPilot says:

• PreArm: Motors: …

The motors library, the part of ArduPilot that turns the thrust it wants into a signal for each motor, found its own setup incomplete. The words after “Motors:” are its reason and have their own explanation: most often “Check frame class and type” (no frame chosen yet) or “no SERVOx_FUNCTION set to Motor1” (a motor has no output). This test runs even with the arming checks switched off.

What to do, most likely first

1. No frame has been chosen: FRAME_CLASS is still 0 on a freshly flashed board.

   FixSet FRAME_CLASS (1 for a quad) and FRAME_TYPE (1 for X, 12 for the Betaflight motor order), then reboot.

2. A motor has no output assigned to it.

   CheckThe message names the motor. Look through the SERVOn_FUNCTION parameters for its number.

   FixGive each motor an output: SERVOn_FUNCTION 33 is Motor1, 34 Motor2, 35 Motor3, 36 Motor4. The Board & Wiring Planner shows which pad is which output.

3. The motor spin settings contradict each other.

   FixKeep MOT_SPIN_ARM below MOT_SPIN_MIN, and MOT_SPIN_MIN at 0.3 or less.

Parameters to look at

Where to do it:Setup & Tuning GuideSetup & Tuning GuideBoard & Wiring Planner