Home Position Return By The Limit Switch Combined Method - Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual

Home position return by the limit switch combined method

Limit switch combined method
The proximity dog is not used in this method. Home position return can be executed by using the external upper/lower limit
switch.
When the home position return is started, it travels to direction of home position return with "home position return speed".
Deceleration is made by turning the limit switch of home position return direction ON to OFF, it travels to reverse direction of
home position return with creep speed, and the zero point just before limit switch is home position.
Home position return by the limit switch combined method
Operation of home position return by limit switch combined method for setting the limit switch in the home position return
direction is shown below.
º
Acceleration time Deceleration time
Home position
return direction
V
Home position
return start
Home position return execution
Home position return by the limit switch combined method is executed using the servo program (Page 378 Servo
program for home position return).
5 POSITIONING CONTROL
396
5.21 Home Position Return
Home position
return speed
(1)
(3)
Home position
External limit switch
(Indicates with normally closed contact)
The travel value in this range is stored in the monitor
register "travel value after proximity dog ON".
The travel value in this range is stored in the monitor
register "home position return re-travel value".
It travels to preset direction of home position
(1)
return with the home position return speed.
A deceleration stop is made by the external
(2)
limit switch ON to OFF.
After a deceleration stop, it travels to
(3)
reverse direction of home position return
with the creep speed, and the home position
return ends with the zero point just before
(2)
limit switch.
Creep speed
Zero point