Siemens SINUMERIK 840C - Manual (Page 354)

01.99 6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.7 Axis-specific MD 2 (axial data 2)
Servo gain factor 5th parameter set (as from SW 4) 1312*
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”.
Servo gain factor 6th parameter set (as from SW 4) 1316*
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”.
Servo gain factor 2nd parameter set for thread cutting
(G33, G36, G63)
1320*
Default value Lower input limit Upper input limit Units
0
166
0 (as from SW 4.4)
10 000
80 000 (as from SW 5)
0.01 s -1
Active in
BAG in Stop
Active: All channels of the mode group in STOP
This NC MD is similar to NC MD 252*. However, it only applies to axes involved in the function
”Thread” (G33 to G36, G63) (see Section entitled ”Functional Descriptions”).
As the rotary axis and the infeed axes interpolate for tapping, both of these axes must be set
with the active servo gain factor.
The time constants for the dynamic feedforward control (see NC MD 1324*) and the feed-
forward control factor ( NC MD 1260*) can also be used to reduce the following error.
Input value ”0” means that instead of 1320* the value from 252*, instead of 1324* the value
from 392* and instead of 1260* the value from 312* are used.
Note:
SW 4 and higher: see the section entitled ”Functional Descriptions: Parameter set switchover”.
Time constant symmetrizing filter rigid tapping 1324*
Default value Lower input limit Upper input limit Units
0 0 1 000 0.1 ms
Active on
NC Stop
Active: In the next block
A time constant of the dynamic feedforward control can be entered for the axes involved in the
function ”Thread” (G33 to G36, G63).
This machine data has the same effect as NC MD 392*.
NC MD 1324* is only used when NC MD 1320* is not equal to 0.
Note:
As from SW 4, for 8 parameter sets see the section entitled ”Functional Descriptions:
Parameter set switchover”.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 6–169
SINUMERIK 840C (IA)