6.14 Setting Unit Systems
6.14.1 Setting the Position Reference Unit
6-45
6
Basic Functions That Requir
e Setting befor
e Operation
*1.
These are reference values for setting SERVOPACK parameters. Contact the manufacturer for actual linear
encoder scale pitches.
*2.
This is the model of the Serial Converter Unit.
*3.
This is the model of the Head with Interpolator.
*4.
This is the model of the Interpolator.
*5.
If you use an encoder pulse output with this linear encoder, the setting range of the encoder output resolution
(Pn281) is restricted. Refer to the following section for details on the encoder output resolution (Pn281).
7.5.2 Setting for the Encoder Divided Pulse Output
Absolute
Heidenhain
Corporation
LIC4100 Series
20.48
EIB3391Y
*4
4,096
0.005
μ
m
LIC2100 Series
204.8
EIB3391Y
*4
4096
0.05
μ
m
409.6
EIB3391Y
*4
4096
0.1
μ
m
LC115
40.96
EIB3381Y
*4
4,096
0.01
μ
m
LC415
40.96
EIB3391Y
*4
4096
0.01
μ
m
Mitutoyo
Corporation
ST781A/ST781AL
256
–
512
0.5
μ
m
ST782A/ST782AL
256
–
512
0.5
μ
m
ST783/ST783AL
51.2
–
512
0.1
μ
m
ST784/ST784AL
51.2
–
512
0.1
μ
m
ST788A/ST788AL
51.2
–
512
0.1
μ
m
ST789A/ST789AL
25.6
–
512
0.05
μ
m
ST1381
5.12
–
512
0.01
μ
m
ST1382
0.512
–
512
0.001
μ
m
Renishaw
PLC
EL36Y-
050F
12.8
–
256
0.05
μ
m
EL36Y-
100F
25.6
–
256
0.1
μ
m
EL36Y-
500F
128
–
256
0.5
μ
m
RL36Y-
050
12.8
–
256
0.05
μ
m
RL36Y-
001
0.256
–
256
0.001
μ
m
Magnes-
cale Co.,
Ltd.
SR77-
LF
*5
80
–
8,192
0.0098
μ
m
SR77-
MF
80
–
1,024
0.078
μ
m
SR87-
LF
*5
80
–
8,192
0.0098
μ
m
SR87-
MF
80
–
1,024
0.078
μ
m
SQ47/SQ57-
S
F
SQ47/SQ57-
T
F
20.48
–
4096
0.005
μ
m
SQ47/SQ57-
A
F
SQ47/SQ57-
F
F
40.96
–
4096
0.01
μ
m
Resolution
You can calculate the resolution that is used inside the SERVOPACK (i.e., the travel distance per
feedback pulse) with the following formula.
The SERVOPACK uses feedback pulses as the unit to control a Servomotor.
Continued from previous page.
Type of
Linear
Encoder
Manufac-
turer
Linear Encoder
Model
Linear
Encoder
Pitch
[
μ
m]
*1
Model of Serial Con-
verter Unit or Model of
Interpolator
Resolution Resolution
Information
Resolution (travel distance per feedback pulse) =
Linear encoder pitch
Resolution of Serial Converter Unit or linear encoder
Linear encoder pitch
Linear encoder pitch
=Distance for one cycle of the analog voltage
feedback signal from the linear encoder