8 Home Position Return and Internal Positions
160 SD780 Series Servo Technical Manual
b.Start the home position return →Home position signal ON →Search for the falling edge of home
position at high speed reverse direction →Decelerate to 0 →Search for the rising edge of home
position at low speed forward direction →Search for the falling edge of home position at low speed
reverse direction →Search for the Z pulse in reverse direction.
14-b
-H
L
-L
-H
Home position
signal
Z pulse
Limit signal
Home position
signal
Forward
direction
Running route
Limit signal
Motor
Home position return method 14-b
c.Start the home position return →Home position signal OFF →Search for the falling edge of
home position at high speed reverse direction →Touch the reverse limit →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.
14-c
-H
-L
-H
H
H o m e p o s i t i o n
s i g n a l
Z p u l s e
L i m i t s i g n a l
H o m e p o s i t i o n
s i g n a l
F o r w a r d
d i r e c t i o n
R u n n i n g
r o u t e
L i m i t s i g n a l M o t o r
Home position return method 14-c