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6 POSITIONING CONTROL
(3) Home position return execution
Home position return by the count type 3 is executed using the servo program in
Section 6.23.16.
(4) Cautions
(a) A system which the servomotor can rotate one time or more is required.
(b) After the proximity dog ON, when a servomotor rotates one time to reverse
direction after stop with travel value set in the "travel value after proximity
dog ON", make a system which does not turn OFF the external upper/lower
stroke limit.
(c) Home position return and continuously start of home position return are also
possible in the proximity dog ON in the count type 3.
When the home position return and continuously start of home position
return are executed in the proximity dog ON, the home position return is
executed after return the axis once to position of the proximity dog OFF.
(d) When the "travel value after proximity dog ON" is less than the deceleration
distance from "home position return speed" to "creep speed", a minor error
"an overrun occurred because the setting travel value is less than the
deceleration distance at the proximity dog signal input during home position
return of count type." (error code: 209) will occur and deceleration stop is
made.
(e) When "1 : Not need to pass motor Z phase after the power supply is
switched on" is selected in the "function selection C-4" of servo parameter
(expansion setting parameter), even if it does not pass zero point at the
servo amplifier power ON, the zero pass signal (M2406+20n) turns ON. This
operation is the same as count type 1.
(f) If in-position signal (M2402+20n) does not turn ON, home position return is
not ended.