Siemens SINUMERIK 840C Installation Instructions Manual page 379

6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.7.1 Axis-specific MD bits 2 (axial bits 2)
The following bits are defined for the following axes. They are then active for the following axis
and the leading axes activated in the GI grouping. The above values are included when
calculating the synchronous position (G403).
Bit 5 Bit 5=1 Include tool length compensations for GI position calculations
Bit 5=0 Do not include tool length compensations
Radius compensations are never included in calculations.
Active:
Bit 4 Bit 4=1 Include programmable ZO offset (G58...G59) for GI position calculations
Bit 4=0 Do not include programmable ZO offset (G58 ... G59)
Bit 3 Bit 3=1 Include external ZO for GI position calculations
Bit 3=0 Do not include external ZO
Bit 2 Bit 2=1 Include ZO (G54...G57) for GI position calculations
Bit 2=0 Do not include ZO (G54...G57)
Bit 1 Bit 1=1 Include DRF and preset for GI position calculations
Bit 1=0 Do not include DRF and preset
Bit 0 Reference system GI positions
Bit 0=1 The positions have been entered in the workpiece system; include offsets in
bits 2...5 in calculation
Bit 0=0 Positions have been entered in machine system; do not include any offsets in
calculation
NC MD 7
1856*
Time-optimized tooth pitch synchronization can be set with bit 4. This means that the
synchronous position is approached by deceleration when the following axis velocity is above
half of the maximum velocity. Below this velocity, the synchronous position is approached by
the shortest path.
Note:
This bit only takes effect if MD 1848*, bit 7, "Synchronization in tooth pitch" is also active.
Bit 4 Bit 4=1 The synchronized path of following rotary axes is limited to 1
revolution/denominator of the 1st GI link ratio . Above half the maximum speed
the synchronous position is reached by deceleration, below half the maximum
speed, along the shortest path.
Bit 4=0 The synchronization path of following rotary axes is limited to 1
revolution/denominator of the 1st GI link ratio. The synchronous position is
then always approached along the shortest path.
Bit 0 Bit 0=1 The function acceleration limitation of ELG following axes is activated.
Bit 0=0 The function is not activated.
6–194
Immediately
Bit No.
6 5 4
Time-
optimized
synchroniza
tion (as
from SW 6)
©
Siemens AG 1992 All Rights Reserved
3 2 1
6FC5197- AA50
SINUMERIK 840C (IA)
07.97
0
Accelera-
tion limit. of
ELG follow.
axes (as
from SW 6)