8 Home Position Return and Internal Positions
149 SD780 Series Servo Technical Manual
Home position return method 7
a. Start the home position return →Home position signal OFF →Search for the rising edge of
home position at high speed forward direction →Decelerate to 0 →Search for the falling edge of
home position at low speed reverse direction →Search for the Z pulse in reverse direction.
Motor
Home position
signal
Forward
direction
7-a
Home
position signal
Z pulse
Running route
Limit signal
Limit signal
H
-H
-L
Home position return method 7-a
b.Start the home position return →Home position signal ON →Search for the falling edge of home
position at low speed reverse direction →Search for the Z pulse in reverse direction.
Motor
Home position
signal
Forward
direction
7-b
Home position
signal
Z pulse
Running route
Limit signal
Limit signal
-H
-L
Home position return method 7-b