Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 275

13. USING A LINEAR SERVO MOTOR
13.5.3 Home position return
(1) Incremental linear encoder
CAUTION
(a) When the linear encoder home position (reference mark) exists in the home position return direction
The home position on the incremental linear encoder is a position per 1048576 pulses (changeable with
the third digit of the parameter No.PS01), which is based on the linear encoder home position (reference
mark) passed primarily after the start of home position return. Change the setting value of the parameter
No.PS01 according to the linear encoder resolution.
For the proximity dog type home position return, the nearest home position reference position after
turning the proximity dog signal off will be the home position.
The linear encoder home position must be set to only one during the whole stroke and to the position to
be surely passed after the start of home position return. The encoder Z-phase pulse (LZ) cannot be
used.
POINT
The incremental linear encoder and the absolute position linear encoder have
different home position reference positions at the home position return.
If the resolution or stop interval (the third digit of the parameter No.PS01) of the
linear encoder is too large, it is very dangerous since it may crash into the stroke
end.
Parameter No.PS01
Stop interval setting
at the home position return
Setting Stop interval
value [pulse]
0 8192
1 131072
2 262144
3 1048576
4 4194304
5 16777216
6 67108864
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