Siemens SINUMERIK 840Di - Page 367

06.03
10.5 Axes and spindles
10-367
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
MD31020 * pulse rev.
360 degrees
MD 31070
MD 31080
**
MD10210
*
MD 31060
MD 31050
Internal
resolution
=
500 * 128
360
1
**
1000
1
1
*
1
= 5.625
Internal
resolution
=
int. increments
Encoder pulse
The encoder increment corresponds to 5.625 internal increments.
An encoder increment corresponds to 0.005625 degrees (highest possible
positioning resolution).
Supposed the following conditions are provided:
 The incremental encoder is mounted on the motor.
 Encoder pulses = 2048 [pulses/rev.]
 Pulse multiplication = 128
 Internal precision = 1000 [increment/degree]
 Encoder gear stage = 1:1
 Load gear stage 1= 2.5:1 [motor rev./spindle rev.]
 Load gear stage 2= 1:1 [motor rev./spindle rev.]
Gear stage 1
MD 31020 * pulse rev.
360 degrees
MD 31070
MD 31080
**
MD10210
*
MD 31060
MD 31050
Internal
resolution
=
2048 * 128
360
1
**
1000
1
1
*
2.5
= 0.54932
Internal
resolution
=
int. increments
Encoder pulse
One encoder increment corresponds to 0.54932 internal increments.
An encoder increment corresponds to 0.00054932 degrees (highest possible
positioning resolution).
Gear stage 2
2048 * 128
360
1
**
1000
1
1
*
1
= 1.3733
Internal
resolution
=
int. increments
Encoder pulse
One encoder increment corresponds to 1.3733 internal increments.
An encoder increment corresponds to 0.0013733 degrees (highest possible
positioning resolution).
Example B:
Motor-mounted
encoder
10 NC Start-U
p
with HMI Advanced