YASKAWA E-7-Series SGD7S Product Manual page 160

5.16 Electronic Gear Settings
5.16.1 Electronic Gear Ratio Settings
SGM7A, SGM7J, SGM7G -
 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.
Electronic gear ratio
When Using a Serial Converter Unit
Electronic gear ratio
 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
Incremen-
tal
5-48
SGMCS -
SGMCV -
Travel distance per reference unit (reference units) × Linear encoder resolution
B Pn20E
= =
Linear encoder pitch (the value from the following table)
A
Pn210
B Pn20E Travel distance per reference unit (reference units) × Resolution of the Serial Converter Unit
= =
A Pn210
Linear Encoder
Manufacturer
Model

LIDA48
Heidenhain
Corporation

LIF48
Renishaw
RGH22B
PLC

SR75-

SR75-

SR85-
Magnescale
Co., Ltd.

SR85-
*4
SL700 , SL710
*4,
SL720 SL730
Specification
Code
24-bit multiturn absolute encoder
7
24-bit incremental encoder
F
Code Specification
20-bit single-turn absolute encoder
3
20-bit incremental encoder
D
Specification
Code
22-bit single-turn absolute encoder
E
22-bit multiturn absolute encoder
I
Linear encoder pitch (setting of Pn282)
Linear
Model of Serial Con-
Encoder
verter Unit or Model of
Pitch
Head with Interpolator
[μm]
JZDP-D003-
20
JZDP-G003-
JZDP-D003-
4
JZDP-G003-
JZDP-D005-
20
JZDP-G005-
*4
80
LF
MF 80
*4
80
LF
MF 80
*4
PL101-RY
,
800
*4
MJ620-T13
Encoder Resolution
16,777,216
16,777,216
Encoder Resolution
1,048,576
1,048,576
Encoder Resolution
4,194,304
4,194,304
Resolution Resolution
*1

256
-E
*1 0.0049 μm
 4,096
-E
*1

256
-E
*1 0.00098 μm
 4,096
-E
*1

256
-E
*1 0.0049 μm
 4,096
-E
0.0098 μm
– 8,192
– 1,024
0.0098 μm
– 8,192
– 1,024
*2
0.0977 μm
8,192
*3
Linea
r
Linea
r
0.078 μm
0.016 μm
0.078 μm
0.078 μm
0.078 μm