6.16 Setting the Origin of the Absolute Encoder
6.16.1 Absolute Encoder Origin Offset
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6.16
Setting the Origin of the Absolute Encoder
6.16.1
Absolute Encoder Origin Offset
The origin offset of the absolute encoder is a correction that is used to set the origin of the
machine coordinate system in addition to the origin of the absolute encoder. Set the offset
between the absolute encoder origin and the machine coordinate system position in
home off-
set
(607Ch).
The offset is added to
position actual value
(6064h) after the parameters are enabled when the
power supply is turned ON or with
user parameter configuration
(2700h).
6.16.2
Setting the Origin of the Absolute Linear Encoder
You can set any position as the origin in the following linear encoders.
•
From Mitutoyo Corporation
ABS ST780A Series or ST1300 Series
Models: ABS ST78
A/ST78
AL/ST13
•
Renishaw PLC
EVOLUTE Series
Models: EL36Y-
•
Renishaw PLC
RESOLUTE Series
Models: RL36Y-
Preparations
The following conditions must be met to set the origin of the absolute linear encoder.
•
The parameters must not be write prohibited.
•
The servo must be OFF.
Index
Subindex
Name
Data
Type
Access
Data Ranges
Default
Value
Saving to
EEPROM
607Ch
0
Home offset
DINT
RW
-536,870,912
to 536,870,911
0
Yes
If the encoder position (X) is at the origin (0), then
home offset
(607Ch) would be set to the
value of -X.
Example
Origin of machine
coordinate system
Encoder position (X)
Position actual value
(6064h)
Home offset
(607Ch (PnB46))
Encoder coordinate
Absolute encoder origin
1. After you set the origin, the /S-RDY (Servo Ready) signal will become inactive because the
system position data was changed. Always turn the SERVOPACK power supply OFF and ON
again.
2. After you set the origin, the Servomotor phase data in the SERVOPACK will be discarded. If
you are using a Linear Servomotor without a Polarity Sensor, execute polarity detection again
to save the Servomotor phase data in the SERVOPACK.
Important
