Testing The Servos - Kitronik BBC Micro Bit move Mini Mk2 Manual

4

TESTING THE SERVOS

SERVOS
The continuous rotation servos used in the :MOVE mini are controlled in the
same manner as normal remote control servos. These servos are controlled
by a repeating pulse, whose width commands the servo to turn to a position.
For a normal servo, position is measured from the output shaft and used to
determine what angle the servo should stop at.
NORMAL SERVO
CONTINUOS ROTATION SERVO
A continuous rotation servo is slightly different. Instead of the signal telling
the servo how far to move, it tells the servo how fast to move.
SPEED:
DEGREES:
Because of component tolerances, we may need to set the centre point on
the :MOVE mini servos to ensure it will stop when commanded. This is done
with a trimmer, which is explained later on.
14
0 DEGREES
90 DEGREES
180 DEGREES
STOP