Siemens SINUMERIK 840C Installation Instructions Manual page 259

6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.5 Spindle-specific MD (spindle data)
• Encoder mounted to the spindle via the measuring gear; SIPOS unconditioned signal
encoder and HMS servo loop module
b =
p =
f =
r1 =
r2 =
If these factors are introduced into the formula then:
MD 4550 =
MD 4560 = 1 444 000
Reduction by the common factor 240 000 yields:
MD 4550 = 1
MD 4560 = 6
Example
Motor measuring systems as encoder with SIMODRIVE 611-D
G = 0.5
•
p = 2048
f = 128
r = 1
MD 4550 =
MD 4560 =
MD 458* =
458*
Default values
1
The measuring system resolution can be adapted to any application using the HMS servo loop
module. The pulses arriving from the encoder are multiplied in two steps:
Measuring system
Pulse multiplication for HMS
The following values are permissible for MD 458* when using a HMS servo loop module or
611D:
Hence, the attainable maximum is a pulse multiplication by the factor 512.
6–74
More user manuals on
0.5 10 -3 degrees
•
2500 pulses per revolution
8 HMS pulse multiplication
2 2 spindle revolutions correspond to
3 3 encoder revolutions
240 000
-3
10 degrees
pulses per revolution
pulse multiplication
8192
5625
128
f: Pulse multiplication for EXE/611D/HMS
Lower input limit
0
Pulse multiplication
Measuring system resolution
HMS: 1, 2, 4, 8, 16, 32, 64, 128
611D/PCU: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512
ManualsBase.com
Upper input limit
128
512 (as from SW 3)
Pulse multiplication
hardware 4 by high-resolution
•
meas. syst. MD 458*
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Siemens AG 1992 All Rights Reserved
09.95
Active on
Power On
Units
–
6FC5197- AA50
SINUMERIK 840C (IA)