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06.03
10.3 System data
10-289
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Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
10.3.6 Traversing ranges
The range of values of the traversing ranges directly depends on the selected
computational resolution (see Subsection 10.3.1, page 10-281).
With the default assignment of the machine data for the computational
resolution
S
1,000 increments/mm
S
1,000 incr/degr.
the following traversing ranges result:
Table 10-10 Traversing ranges
Traversing range in the metric system Traversing range in the inch system
Linear axes
999,999.999 [mm; degrees] 399,999.999 [Inch; degrees]
Rotary axes
999,999.999 [mm; degrees] 999,999.999 [inch; degrees]
Interpolation parameters I, J, K
999,999.999 [mm; degrees] 399,999.999 [Inch; degrees]
10.3.7 Positioning accuracy
The positioning accuracy depends on:
S
the computational accuracy (internal increments/(mm or degrees))
S
the actual-value resolution (encoder increments/(mm or degrees)).
The rougher resolution of both determines the positioning accuracy of the NC.
The input resolution, the position control and interpolation clock do not affect the
accuracy.
Table 10-11 Positioning accuracy: Machine data
Number Identifier Name/remarks Ref.
General ($MN_ ...)
10200 INT_INCR_PER_MM Computational resolution for linear positions G2
10210 INT_INCR_PER_DEG Computational resolution for angular positions G2
Axis-specific ($MA_ ...)
31020 ENC_RESOL[n] Encoder lines per revolution
Computational
resolution and
traversing ranges
Computational
accuracy and
traversing ranges
Machine data
10 NC Start-Up with HMI Advanced