Computer Drive Installation Instructions
6 NC Machine Data (NC MD), NC Setting Data (NC SD) 09.95
6.7 Axis-specific MD 2 (axial data 2)
Motor current on equilibration (as from SW 3)
1292*
Default value Lower input limit Upper input limit Units
0
-70
-700 (as from SW 4)
70
700 (as from SW 4)
0.1 % of the
power section
current
Active on
NC Stop
MD 1292* is used to define the value of an additional torque of a motor used to compensate
for stationary loads (e.g. pull of gravity on hanging axes) (this MD is only active for digital feed
spindle drives).
Note: As from SW 4, for 8 parameter sets
Period of the learning signal (as from SW 4.4)
1296*
Default value Lower input limit Upper input limit Units
0 0 16 000 ms
Active on
NC Stop
The learning signal period of neural quadrant error compensation can be changed with this
data. This also alters the required traversing range and the learning time.
Note:
With default value 0 and values under 500 ms are used a permanently set period length of 2 s
is used. Up to SW 4.3 this time cannot be parameterized and is permanently set to 1 s.
Basic distance for distance coding
1300*
Default value Lower input limit Upper input limit Units
1 000 0 16 000 –
Active on
Power On
Active: After POWER ON
The basic distance between the reference marks for distance coded linear scales entered in
multiples of the grating pitch (division period).
External pulse multiplication
1304*
Default value Lower input limit Upper input limit Units
1 1 100 –
Active on
Power On
Active: After Power On
External pulse multiplication factor (e.g. external EXE error) for linear measuring systems with
distance coded reference points.
The number of signal periods (grid lines) that are generated from one division period of the of
the linear scale (grating pitch) by external interpolation digital electronics.
Servo gain factor 4th parameter set (as from SW 4)
1308*
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
NC Stop
These MD have the same meaning as MD 252*, see also ”Functional Descriptions: Parameter
set switchover”.
6–168 ©
Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)