Mitsubishi Electric A173UHCPU Programming Manual page 291

7. POSITIONING CONTROL
(b) Adjust the position where the proximity dog turns OFF, such that the zeroing
second travel value becomes half the travel value for one revolution of the
motor.
A home position discrepancy equivalent to one revolution of the motor may
occur if the zeroing travel value is less than half the travel value for one
revolution of the motor.
Proximity
dog
ON OFF
IMPORTANT
(1) In the following cases, before starting the zeroing, use JOG operation or
some other method to return the axis to a position before where the
proximity dog turned ON. Zeroing will not start unless the axis is returned
to a position before the proximity dog position.
(a) Zeroing from a position after the proximity dog turned OFF.
(b) When the power is turned ON after zeroing was completed.
If the deceleration stop position after the proximity
dog turns OFF is very close to a zero point, the creep
speed and deceleration settings may result in a home
position discrepancyequivalent to one revolution
of the motor.
Zero-point
7 − 144