Siemens SINUMERIK 840C - Manual (Page 292)

07.97 6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.6.1 General MD bits (general bits)
Bit 2 The extended threading package contains the following functions:
a) Following error compensation
b) Multiple-turn thread
c)
Thread recutting logic
a) Following error compensation
This function corrects the start angle of the spindle by the following error.
This means that the same thread is cut at high speed as at low speed.
b) Multiple-turn thread
With this function, you can cut multiple-turn threads. The channel-specific
start angle for each turn is programmed directly with G92 A.. The angle is
displayed in the setting data display "spindle data" under the letter for the
angle. You can also enter the angle in this display.
c) Thread recutting/set-up
With this function you can reclamp and recut a precut thread with a
constant pitch. You cannot recut a thread with a variable pitch. You can
select the appropriate display in the machine area display of the "JOG"
mode by pressing softkey "Recut/set up thread".
d) Smoothing exponent G92 T
In addition to the above functions the function package level-up thread
contains the function smoothing exponent which you can program with
G92 T.. You can program the smoothing exponent for dynamic smoothing
using the G92 function with the letter T. You must have set the value for T
value in a setting data. The T value can also be changed in the setting
data display.
Bit 1 Bit 1=1 Axis-specific G commands to PLC
Bit 1=0 No axis-specific G commands to PLC.
Active: On POWER ON
7 6 5 4 3 2 1 0
Bit No.
NC MD
5026
(as
from
SW 6)
2nd MCS
mirroring Z 2nd MCS
mirroring Y 2nd MCS
mirroring X
Mirroring of the axis in question of the 2nd machine coordinate system at the coordinate origin
opposite the collision monitoring coordinate system.
Bit 0-2=1
Mirroring of the axis in question
Bit 0-2=0 No mirroring
Active:
Power On
7 6 5 4 3 2 1 0
Bit No.
NC MD
5027
(as
from
SW 6)
3rd MCS
mirroring Z 3rd MCS
mirroring Y 3rd MCS
mirroring X
Mirroring of the axis in question of the 3rd machine coordinate system at the coordinate origin
opposite the collision monitoring coordinate system.
Bit 0-2=1 Mirroring of the axis in question
Bit 0-2=0 No mirroring
Active:
Power On
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 6–107
SINUMERIK 840C (IA)