YASKAWA SGD7S

5.16 Electronic Gear Settings
5.16.1 Electronic Gear Ratio Settings
5-50
 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.
*1. This is the model of the Serial Converter Unit.
*2. This is the model of the Head with Interpolator.
*3. This is the model of the Interpolator.
*4. 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).
6.8.2 Setting for the Encoder Divided Pulse Output on page 6-51
Typ e of
Linear
Encoder
Manufacturer
Linear Encoder
Model
Linear
Encoder
Pitch
[μm]
Model of Serial Con-
verter Unit or Model of
Interpolator
Resolution Resolution
Incremen-
tal
Heidenhain
Corporation
LIDA48
 20
JZDP-H003-
-E
*1
256 0.078 μm
JZDP-J003--E
*1
4,096 0.0049 μm
LIF48
 4
JZDP-H003-
-E
*1
256 0.016 μm
JZDP-J003--E
*1
4,096 0.00098 μm
Renishaw
PLC
RGH22B 20
JZDP-H005-
-E
*1
256 0.078 μm
JZDP-J005--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
SQ10 400
MQ10-FLA
*3
8192 0.0488 μm
MQ10-GLA
*3
Absolute
Heidenhain
Corporation
LIC4100 Series 20.48
EIB3391Y
*3
4,096 0.005 μm
LC115 40.96
EIB3381Y
*3
4,096 0.01 μm
Mitutoyo
Corporation
ST781A/ST781AL 256 – 512 0.5 μm
ST782A/ST782AL 256 – 512 0.5 μm
ST783/ST783AL 51.2 – 512 0.1 μm
ST784/ST784AL 51.2 – 512 0.1 μm
ST788A/ST788AL 51.2 – 512 0.1 μm
ST789A/ST789AL 25.6 – 512 0.05 μm
ST1381 5.12 – 512 0.01 μm
ST1382 0.512 – 512 0.001 μm
Magnescale
Co., Ltd.
SR77-
LF
*4
80 – 8,192 0.0098 μm
SR77-
MF 80 – 1,024 0.078 μm
SR87-LF
*4
80 – 8,192 0.0098 μm
SR87-MF 80 – 1,024 0.078 μm
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.
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