Siemens SIMODRIVE 611 Planning Manual page 71

05.01
Table 3-4 Direct position sensing, analog controls
Control
board
version
Numerical
control
Main
(analog)
spindle
control
with
analog
setpoint
inter–
face
x4
x4
C–axis operation with NC
HGL module: refer to Section 3.6
Numerical
control
(analog)
Main
spindle
control
with
x4
analog
setpoint
x4
inter–
face
Spindle positioning with the NC
HGL module: refer to Section 3.6
1) The absolute accuracy when synchronizing with a BERO is a function of:
– the BERO switching time
– BERO hysteresis
– signal edge gradient of the BERO signal (dependent on the direction of rotation!) and the switching thresholds
in the drive; high >13 V, low < 5 V
– the search speed or the signal run times in the evaluation electronics
2) Distance–coded reference marks can be evaluated
 Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
Direct position sensing, analog controls
n*
SIMODRIVE
drive
module L1
Standard/C–axis operation
ks
Standard track
HGL module
kc
l < 50 m
C–axis track
L1 and L2  50 m
l  50 m
n*
SIMODRIVE
drive
module
Terminating connector
Standard/C–axis operation
ks
Standard track
HGL module
kc
l  50 m
C–axis track
l  50 m
3 Motor Selection, Position/Speed Sensing
3.5 Overview, position sensing
Toothed wheel
1PH2
L2
Spindle
Sensing head
Incremental
Toothed wheel
1PH4/6/7
Sensing head
M: Max. possible
measuring steps
G: Encoder system
accuracy
Z: Pulse number
Standard track
Ms = ks ⋅ Z ⋅ 4
per 360 degrees
mech.
C–axis track
Mc = kc ⋅ Z ⋅ 4
per 360 degrees
mech.
ks...1, 2, 4, 8
kc...175.78, 351.56
ks, kc...
factors which can
be set in the HGL
module
G depends on the
precision of the
toothed/measuring
wheel encoder
system
Standard track
Ms = ks ⋅ Z ⋅ 4
per 360 degrees
mech.
C–axis track
Mc = kc ⋅ Z ⋅ 4
per 360 degrees
mech.
ks...1, 2, 4, 8
kc...175.78, 351.56
ks, kc...
factors which can be
set in the HGL
module
G depends on
the precision of
the toothed/
measuring wheel
encoder system
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