Siemens SINUMERIK 840C Installation Instructions Manual page 334

09.95
NC MD
572*
Default value:
Active:
Bit 4
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Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
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MD 572 = 0000 1010 only on the 840C; otherwise, all bits are 0.
For 840C (M), all are 0.
In the next block
Bit 4 = 0 When G90 and/or G68 are programmed with rotary axes, traversing paths
of > 360 degrees or > 180 degrees can result, and the established
direction of movement can change if zero offsets, tool offsets etc. are set
up for the first time or if ZO, TO etc. are altered in the program.
Example:
N1 G90 C0 LF
N2 C90 LF
N3 G58 C-180 LF
N4 G90 C+135 LF
(Bit 4=0) traversing path resulting from N3+N4.
0
0
0
315
90
N3
135
0
180
(Bit 4=1) traversing path resulting from N3+N4.
ManualsBase.com
6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.6.4 Axis-specific MD bits 1 (axial bits 1)
Bit No.
5 4 3
Traverse TO
rotary axis mirroring for
modulo 360 transverse
deg. axis
(C ... rotary axis)
N2
0
0
N4
6FC5197- AA50
2 1 0
Modulo
Axes
360° prog. Transverse
without TO
of rotary axis
on PRESET
axis
6–149