Instruction manual

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5. OPERATION AND FUNCTIONS
5.3 Home position return
POINT
The incremental linear encoder and the absolute position linear encoder have
different home position reference positions at the home position return.
5.3.1 Incremental linear encoder
CAUTION
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.
POINT
When the servo system controller is a positioning module (QD75MH), the
operation will be different. Refer to (3) of this section.
(1) 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.
0
8192
1 131072
2
262144
3
1048576
4
4194304
5
16777216
6
67108864
Parameter No. PS01
Stop interval setting
at the home position return
Setting value
Travel [Pulse]
For the zeroing dog type home position return, the nearest home position reference position after turning
the zeroing 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.