Motors start spinning when just Armed, is it normal?

ArduCopter Copter 3.1
1

Hi everyone, I have just set up a new X4 with APM 2.6.
I have done Ecs Clibation and radio cabation and the motors can spin according to the throttle. But when I try to arm the copter, the motors start to spin even I keep the throtte at bottom position. Is it a normal arming?

2

Hi,

It is from firmware version 3.1 onwards, it can be disabled by setting MOT_SPIN_ARMED to 0.

Stu