6.14 Setting Unit Systems
6.14.1 Setting the Position Reference Unit
6-44
Linear Servomotors
You can calculate the settings for the electronic gear ratio with the following equation:
When Not Using a Serial Converter Unit
Use the following formula if the linear encoder and SERVOPACK are connected directly or if a
linear encoder that does not require a Serial Converter Unit is used.
When Using a Serial Converter Unit
Feedback Resolution of Linear Encoder
The linear encoder pitches and resolutions are given in the following table.
Calculate the electronic gear ratio using the values in the following table.
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
Incre-
mental
Heidenhain
Corporation
LIDA48
20
JZDP-H003-
-E
*2
256
0.078
μ
m
JZDP-J003-
-E
*2
4,096
0.0049
μ
m
LIF48
4
JZDP-H003-
-E
*2
256
0.016
μ
m
JZDP-J003-
-E
*2
4,096
0.00098
μ
m
Renishaw
PLC
RGH22B
20
JZDP-H005-
-E
*2
256
0.078
μ
m
JZDP-J005-
-E
*2
4,096
0.0049
μ
m
Magnes-
cale Co.,
Ltd.
SR75-
LF
*5
80
–
8,192
0.0098
μ
m
SR75-
MF
80
–
1,024
0.078
μ
m
SR85-
LF
*5
80
–
8,192
0.0098
μ
m
SR85-
MF
80
–
1,024
0.078
μ
m
SL700
*5
, SL710
*5
,
SL720
*5
,
SL730
*5
800
PL101-RY
*3
8,192
0.0977
μ
m
MJ620-T13
*4
SQ10
400
MQ10-FLA
*4
8,192
0.0488
μ
m
MQ10-GLA
*4
Continued on next page.
Numerator
Denominator
B
A
Electronic gear ratio
Travel distance per reference unit (reference units) × Linear encoder resolution
Linear encoder pitch (the value from the following table)
=
=
B
A
Numerator
Denominator
=
=
Electronic gear ratio
Travel distance per reference unit (reference units) × Resolution of the Serial Converter Unit
Linear encoder pitch (setting of Pn282)
