Mitsubishi Electric MELSEC-Q Series - Page 426

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6 POSITIONING CONTROL
(b) When the position where address of absolute linear encoder becomes 0 is
not in the home position return direction.
Home position
return start
1)
2)
Creep speed
Home
position
Linear encoder address=0
Linear encoder
address
Home position
return direction
3)
V
Home position
return speed
1) It travels to reverse of preset direction
of home position return with the home
position return speed.
2) The position where address of absolute
linear encoder becomes 0 is detected,
and a deceleration stop is made.
3) After a deceleration stop, it travels to
direction of home position return with
the creep speed, and the home position
return ends with the position where
address of absolute linear encoder
becomes 0.
Fig. 6.49 Home position return by the dogless home position signal reference
method (Operation C)
POINT
(1) If an external limit switch is detected during home position return operation, an
error occurs and stops.
(2) Home position return retry function cannot be used.
(5) Home position return execution
Home position return by dogless home position signal reference method is
executed using the servo program in Section 6.23.19.