Siemens SINUMERIK 840D Simodrive 611 digital

6 Pro
g
rammin
g
the control
6
03/2006
6.9 Axes and spindles
6-119
© Siemens AG 2006 All Rights Reserved
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
Spindle with raw signal encoder (500 pulses) attached directly to the spindle.
Internal multiple = 2048. Internal calculation resolution = 1000 increments per
degree.
MD 31020 * 2048
360 degrees
Internal resolution =
MD 31070
MD 31080
**
1000
500 * 2048 *1
360 * 1 * 1000
Internal resolution =
0,3515
One encoder increment corresponds to 0.3515 internal increments. One
encoder increment corresponds to 0.0003515 degrees (highest possible
positioning resolution).
Spindle with rotary encoder on the motor (2048 pulses), internal multiple =
2048,
There are 2 gear steps:
Gear step 1: Motor/spindle = 2.5/1
Gear step 2: Motor/spindle = 1/1
Gear step 1
MD 31020 * 2048
360 degrees
MD 31070
MD 31080
**
1000 incr/degr.
*
MD 31060
MD 31050
Internal
resolution
=
2048 * 2048 pulses
360 degrees
1
**
1000 pulses/degr.
1
1
*
2,5
= 0.034332
Internal
resolution
=
One encoder increment corresponds to 0.034332 internal increments. One
encoder increment corresponds to 0.000034332 degrees (highest possible
positioning resolution).
Gear step 2
MD 31020 * 2048
360 degrees
MD 31070
MD 31080
**
1000 incr/degr.
*
MD 31060
MD 31050
Internal
resolution
=
2048 * 2048 pulses
360 degrees
1
**
1000 pulses/degr.
1
1
*
1
= 0.08583
Internal
resolution
=
One encoder increment corresponds to 0.08583 internal increments. One
encoder increment corresponds to 0.00008583 degrees (highest possible
positioning resolution).
Example A for
encoder matching
Example B for
encoder matching