Panasonic MINAS S Series Operating Manual page 115

Homing operation (Precautions)
In the returning operation to the home position using the controller, 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
homing operation, so that these parameters should be determined in consideration of both
the positioning and homing operations.
As for the detail of homing operation, please refer to an operation manual of controller
you use. Following is one of examples.
Example of homing operation
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
( dog) range
Proximity
sensor
Velocity
Initialization
signal
Proximity sensor
( dog) range
Z-phase output from encoder
Z-phase signal from encoder
- App. 18 -
If the initial (home) position could not be found within the
will repeat deceleration and acceleration while going back and
proximity range, the motor
proximity sensor (dog) OFF (moving beyond the proximity
forth (stop with the
opposite
range) and move in the
direction).
Proximity
( dog)
sensor
range
Going back
and forth
Z-phase output from
encoder