Panasonic MINAS A Series Operating Manual page 100

Initialization (Precautions)
■ In the operation of initialization (returning to the home position), if the initialization signal (Z-phase signal from the
encoder) is entered before the motor is not substantially decelerated (after the proximity sensor is activated), the
motor may not stop at the required position. To avoid this, determine the positions with the proximity sensor on
and initialization signal on in consideration of the number of pulses required for successful deceleration. The
parameters for setting the acceleration/deceleration time also affect the operation of initialization, so that these
parameters should be determined in consideration of both the positioning and initializing operations.
The motor will start to decelerate with the proximity sensor ON, and stop with the first initialization signal (Z-phase).
Proximity
sensor
Velocity
Initialization
signal
The motor will start to decelerate with the proximity sensor ON, and stop with the first initialization Z-phase
signal after the proximity sensor OFF.
Proximity
sensor
Velocity
Initialization
signal
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Proximity sensor
(dog) range
Z-phase output from encoder
Proximity sensor
(dog) range
Z-phase signal from encoder
− App. 19 −
If the initial (home) position could not be found within the proximity
range, the motor will repeat deceleration and acceleration while going
back and forth (stop with the proximity sensor (dog) OFF (moving
beyond the proximity range) and move in the opposite direction).
Proximity sensor
(dog) range
Going back
and forth
Z-phase output from encoder