
2. SETTING α SERIES SERVO PARAMETERS B-65150E/04
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(5) Reference position return when a serial type separate detector is used as
an absolute-position detector
When a serial type separate detector is used as an absolute-position
detector, the phase-Z position must be passed once before a reference
position return is performed. Then, turn the CNC off then back on to
allow reference position return.
When reference position return is performed, adjust the deceleration
dog so that the grid-shifted reference position is not too near the
deceleration dog.
Encoder position
Reference position data
of the detector = 0
Position data from
the encoder
Start position of
reference position return
Direction of reference
position return
Deceleration dog
To be adjusted so that the grid-shifted reference
position is not too near the deceleration dog.
Reference counter capacity
Grid-shifted reference
position
Reference position not grid-shifted
Machine position
Grid shift amount
Reference counter