Siemens SINUMERIK 840C Installation Instructions Manual page 223

6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.4 Axis-specific MD 1 (axial data 1)
204*
Default value
40
40
The value defining the "Coarse stop tolerance range "can be higher than that defining the
"Fine stop tolerance range". Consequently, a block change to the next machining block will be
initiated correspondingly sooner.
If this function is not required, it can be rendered ineffective by entering identical values in the
machine data locations for coarse exact stop and fine exact stop.
The coarse stop tolerance range is effective in the following cases:
• G00
• Block preceding G04
• Block preceding setting data
• Block ahead of which only auxiliary functions have been programmed
• Single block without G60/G09
• Jog
• Incremental feed
• End of program
Note:
The coarse stop tolerance range is not approached in continuous-path operation G64
(exception: G00 G64 coarse exact stop). There is no secondary error as a result of a large
number of consecutive positioning operations, as position control is not "deactivated" by the
stop tolerance range; instead, the second block is processed before the end position of the
first block is reached.
The current traversing path is now the remainder of block 1, block 2 and so on.
If the axis stops for an instant, e.g. because another axis is about to move or because there is
no axis movement in this program block, compensation is such that the following error is 0 and
the axis is precisely positioned. Also refer to NC MD 208* and 272*.
Note:
As from SW 4, for 8 parameter sets
6–38
Coarse stop tolerance range
Lower input limit Upper input limit
+0
+0 99 999 999
(as from SW 4.4)
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Siemens AG 1992 All Rights Reserved
Units
16 000 units (MS)
units (MS)
6FC5197- AA50
SINUMERIK 840C (IA)
03.95
Active on
NC Stop