Mitsubishi Electric MELSERVO-J4 series Instruction Manual page 414

14. USING A LINEAR SERVO MOTOR
The following shows the relation between the stop interval at the home position return and the linear
encoder resolution. For example, when the linear encoder resolution is 0.001 μm and the parameter
for the stop interval at the home position return, [Pr.PL01], is set to "_ 5 _ _" (16777216 pulses), the
stop interval is 16.777 mm. The value inside a bold box indicates the recommended stop interval for
each linear encoder resolution.
Linear encoder
resolution [µm]
Pr. PL01
Stop interval
[pulse]
_ 0 _ _ 8192
_ 1 _ _ 131072
_ 2 _ _ 262144
_ 3 _ _ 1048576
_ 4 _ _ 4194304
_ 5 _ _ 16777216
_ 6 _ _ 67108864
In the case of a proximity dog type home position return, the nearest reference home position after
proximity dog off is the home position.
Set one linear encoder home position in the full stroke, and set it in the position that can always be
passed through after a home position return start. LZ (Encoder Z-phase pulse) cannot be used.
0.001 0.005 0.01
0.008 0.041 0.082
0.131 0.655 1.311
0.262 1.311 2.621
1.049 5.243 10.486
4.194 20.972 41.943
16.777 83.886 167.772
67.109 335.544 671.089 1342.177
Linear servo
motor
0 mm/s
ON
Proximity dog
OFF
signal
Reference home
position
Linear servo motor
position
Note. Changeable with [Pr. PL01].
0.02 0.05 0.1
0.164 0.410 0.819
2.621 6.554 13.107
5.243 13.107 26.214
20.972 52.429 104.858
83.886 209.715 419.430
335.544 838.861 1677.722
3355.443 6710.886 13421.773 33554.432 67108.864 134217.728
Home position return speed
Linear encoder home position
14 - 19
0.2 0.5 1
1.638 4.096 8.192
26.214 65.536 131.072
52.429 131.072 262.144
209.715 524.288 1048.576
838.861 2097.152 4194.304
3355.443 8388.608 16777.216
Home position return direction
Creep speed
(Note)
1048576 pulses
1048576 pulses × n
[Unit: mm]
2
16.384
262.144
524.288
2097.152
8388.608
33554.432
Home position