Electronic Gear Ratio Settings - YASKAWA SGD7S Product Manual

SGM7J, SGM7A,
SGM7P, or SGM7G -
SGMCS -
SGMCV -
 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.
B Pn20E
=
Electronic gear ratio
A Pn210
When Using a Serial Converter Unit
B Pn20E
Electronic gear ratio
=
A Pn210
 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 Manufacturer
Encoder
LIDA48
Heidenhain
Corporation
LIF48
Renishaw
RGH22B
PLC
Incremen-
SR75-
tal
SR75-
SR85-
SR85-
Magnescale
Co., Ltd.
SL700
SL720
SQ10
Code
24-bit multiturn absolute encoder
7
24-bit incremental encoder
F
Code
20-bit single-turn absolute encoder
3
20-bit incremental encoder
D
Code
22-bit single-turn absolute encoder
E
22-bit multiturn absolute encoder
I
Travel distance per reference unit (reference units) × Linear encoder resolution
=
Linear encoder pitch (the value from the following table)
Travel distance per reference unit (reference units) × Resolution of the Serial Converter Unit
=
Linear encoder pitch (setting of Pn282)
Linear
Linear Encoder Encoder
Model Pitch
[μm]

20

4
20
*4
 80
LF

MF 80
*4
 80
LF

MF 80
*4 *4
, SL710 ,
800
*4, *4
SL730
400
5.14 Electronic Gear Settings

5.14.1 Electronic Gear Ratio Settings

Specification
Encoder Resolution
16,777,216
16,777,216
Specification Encoder Resolution
1,048,576
1,048,576
Specification Encoder Resolution
4,194,304
4,194,304
Model of Serial
Converter Unit or
Model of Interpolator
*1

JZDP-H003- -E
*1

JZDP-J003- -E
*1

JZDP-H003- -E
*1

JZDP-J003- -E
*1

JZDP-H005- -E
*1

JZDP-J005- -E
–
–
–
–
*2
PL101-RY
*3
MJ620-T13
*3
MQ10-FLA
*3
MQ10-GLA
Resolution Resolution
0.078 μm
256
0.0049 μm
4,096
0.016 μm
256
0.00098 μm
4,096
0.078 μm
256
0.0049 μm
4,096
0.0098 μm
8,192
0.078 μm
1,024
0.0098 μm
8,192
0.078 μm
1,024
0.0977 μm
8,192
0.0488 μm
8,192
Continued on next page.
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