5.3
Technical data encoder for MSK motors
Designation
Symbol
Unit
S1
M1
S2
M2
Interface
Hiperface
EnDat 2.1
Encoder design
Singleturn abso‐
lute
Multiturn absolute
Singleturn abso‐
lute
Multiturn absolute
Distinguishable revolutions
1
4,096
1
4,096
Signal periods
128
2,048
System accuracy
angular
sen‐
conds
±120
±20
Output signal
1Vss
Maximum encoder speed
min
-1
12,000
9,000
15,000
12,000
Current consumption max.
I
Encoder
mA
60
150
250
Power supply voltage
VCC
En‐
coder
V
7...12
3.6...14
Tab. 5-2:
MSK - technial data encoder
Calculate position resolution
The actual position resolution can be done for every encoder type according
to the following calcuation.
Calculation example: "Position resolution for M1 encoder"
from table:
Distinguishable revolutions: 4,096
Number of lines: 128
from documentation about the drive controller:
Encoder resolution
1)
: 13 bit
Position resolution = Number of lines × encoder resolution × distinguishable
revolutions
Position resolution = 128 × 2
13
× 4,096 = 4.294.967.296 information
1)
Encoder resolution depends from the connected controller.
Encoder Singleturn S1, S2
These encoders permit absolute, indirect position recording within one me‐
chanical rotation. The encoders replace separate incremental encoders on
the motor.
After a power failure or after the first POWER ON, the axis must
always at first be moved to its home position.
Exception: Applications in which the maximum working path is
within one mechanical rotation of the motor.
Encoder Multiturn absolute M1,
M2
These encoders permit absolute, indirect position recording within 4,096 me‐
chanical rotations. The encoders replace a separate absolute value encoder
on the motor. With this encoder version, the absolute position of the axis is
preserved even after a switch-off.
DOK-MOTOR*-MSK*EXGIIK3-PR09-EN-P
Bosch Rexroth AG
35/175
Synchronous Servomotors MSK For Potentially Explosive Areas
Technical data