Siemens SINUMERIK 840C - Manual (Page 348)

09.01 6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.7 Axis-specific MD 2 (axial data 2)
u: Impulses variable incremental weighting 2nd measuring
system 1)
1208*
Default value Lower input limit Upper input limit Units
1 0
65000 1)
9999 9999 2)
–
Active on
Power On
Active: After Power On
Applies to feed axes only.
See MD 364*, 368*.
v: Traversing path variable incremental weighting 2nd
measuring system 1)
1212*
Default value Lower input limit Upper input limit Units
1 0
65 000 1)
9999 9999 2)
units (MS)
Active on
Power On
Active: After POWER ON
Applies to feed axes only.
See MD 364*, 368*.
Switchover tolerance 1st/2nd measuring system 1216*
Default value Lower input limit Upper input limit Units
0
1000 3)
0 16 000 units (MS)
Active on
Power On
Active: After Power On
Applies only to feed axes (not to C axes for spindles).
This machine data defines the maximum tolerance between the actual value of the first
measuring system and the actual value of the second measuring system which must not be
exceeded at the time of switching from one measuring system to another. Otherwise a setpoint
value jump occurs because the position controller tries to compensate for the change in the
actual value. To prevent this it is not possible to switch from one measuring system to another
when the tolerance is not maintained and the alarm 1016* ”Measuring system switchover not
possible” is output.
Servo gain (Kv) factor 3rd parameter set 1220*
Default value Lower input limit Upper input limit Units
1 666 0
10 000
80 000 (as from SW 5)
0.01s -1
Active on
Power On
This MD has the same meaning as MD 252*, see also functional description of parameter set
switchover.
_______
1) As from SW 2
2) As from SW 3
3) As from SW 4
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 6–163
SINUMERIK 840C (IA)