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5. OPERATIONAL FUNCTIONS
5.5.11 Home position return using a Z-phase detection method
After moving from the position where home position return has started to the nearest Z-phase (in addition, after
moving by shift amount when home position shift amount is set), home position return is completed. It is
necessary to move to around home position using JOG operation or something similar in advance.
For home position return direction (parameter No.0240), in addition to - direction and + direction, shortcut
direction can be selected.
For the shortcut direction, home position return operation is started in the direction where the travel distance to
the Z-phase is small. At this time, code of the home position shift amount is consistent with the movement
direction from the Z-phase. (Example: If home position shift amount is -100 [command unit], home position is
the position moved from Z-phase by -100 [command unit].)
Speed
ST (Start operation)
J
OG
(JOG operation mode)
Home
position
Z
RN
(Home position return
mode)
Z
P
(Home position return
complete) (Note 3)
Home position sensor
Creep speed
Start
operation
Z
-phase pulse
1) Starts JOG operation
in the direction of home
position sensor. (Note 1)
2) Starts to decelerate at the
position where home
position sensor ON is
detected and stops. (Note 1)
3) Home position
return starts.
Note1. Home position sensor signal is an externally installed signal and monitored by a user program. Execute the movement to
around home position by this signal.
2. When limit switch signal of home position return direction is turned off, limit switch (operation alarm A0, detail 01 to 02)
occurs when the operation starts and home position return cannot be executed.
3. When not passing Z-phase (ZPASS) is tuned off, Z-phase not passed (operation alarm 91, detail 01) occurs when the
operation starts and home position return cannot be executed. Execute home position return after passing through Z-phase
by JOG operation or something similar.
4. When setting of the home position signal re-search (parameter No.0240) is set to "Search again", home position return
parameter setting error (operation alarm 9D, detail 02) occurs when the operation starts and home position return cannot be
executed. Always set to "Do not search again".