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
-3
b = 0.5 10 degrees
•
p = 2500 pulses per revolution
f = 8 HMS pulse multiplication
r1 = 2 2 spindle revolutions correspond to
r2 = 3 3 encoder revolutions
If these factors are introduced into the formula then:
MD 4550 = 240 000
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
-3
G = 0.5 10 degrees
•
p = 2048 pulses per revolution
f = 128 pulse multiplication
r = 1
MD 4550 = 8192
MD 4560 = 5625
MD 458* = 128
458*
f: Pulse multiplication for EXE/611D/HMS
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:
HMS:
611D/PCU: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512
Hence, the attainable maximum is a pulse multiplication by the factor 512.
6–74
Lower input limit Upper input limit
0
512 (as from SW 3)
Pulse multiplication
hardware 4
•
Measuring system resolution
1, 2, 4, 8, 16, 32, 64, 128
©
Siemens AG 1992 All Rights Reserved
Power On
Units
128
–
Pulse multiplication
by high-resolution
meas. syst. MD 458*
6FC5197- AA50
SINUMERIK 840C (IA)
09.95
Active on