Home Position Return By The Proximity Dog Method 1; Home Position Return By The Proximity Dog Method 2 - Mitsubishi Electric MELSEC Q Series Programming Manual

6 POSITIONING CONTROL

6.23.2 Home position return by the proximity dog method 1

(1) Proximity dog method 1
Zero point position after proximity dog ON to OFF is home position in this method.
When it does not pass (zero pass signal: M2406+20n OFF) the zero point from
home position return start to deceleration stop by proximity dog ON to OFF, an
error will occur and home position return is not executed. However, when "1 : Not
need to pass motor Z phase after the power supply is switched on" is selected
in the "function selection C-4 (PC17)" of servo parameter (expansion setting
parameter), if it does not pass zero point from home position return start to
deceleration stop by proximity dog ON to OFF, the home position return can be
executed.
(2) Home position return by the proximity dog method 1
Operation of home position return by proximity dog method 1 for passing (zero
pass signal: M2406+20n ON) the zero point from home position return start to
deceleration stop by proximity dog ON to OFF is shown below.
Home position
return direction
V
Home position
return start
Proximity dog
Fig. 6.33 Home position return operation by the proximity dog method 1
(3) Home position return execution
Home position return by the proximity dog method 1 is executed using the servo
program in Section 6.23.19.
Home position return speed
Creep speed
OFF
ON
6 - 209
(Note) : A deceleration stop occurs after
the proximity dog OFF.
Positioning is carried out from this
position to the zero point.
The distance to the zero point is
based on the servo data.
t
Zero point
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".