YASKAWA E-7-Series SGD7S - Page 160

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