NCK start-up
10.2 System data
CNC Part 1 (NCK, PLC, drive)
Commissioning Manual, 11/2006, 6FC5397-2AP10-2BA0
107
10.2.6 traversing ranges
Computational resolution and traversing ranges
The range of values of the traversing ranges directly depends on the selected computational
resolution (see Subsection "Resolution").
With the default assignment of the machine data for the computational resolution
• 1000 inc./mm
• 1000 inc./deg.
the following traversing ranges result:
Table 10-6 traversing ranges
Traversing range in the metric system Traversing range in the inch system
Linear axes ± 999,999.999 [mm; deg.] ± 399,999.999 [inch; deg.]
Rotary axes ± 999,999.999 [mm; deg.] ± 999,999.999 [inch; deg.]
Interpolation parameters I, J, K ± 999,999.999 [mm; deg.] ± 399,999.999 [inch; deg.]
10.2.7 Positioning accuracy of the control system
Computational resolution and traversing ranges
The positioning accuracy depends on:
• the computational accuracy (internal increments/(mm or degrees))
• 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.
Machine data
Table 10-7 Positioning accuracy: Machine data
Number Name of identifier Name / remarks Reference
General ($MN_ ... )
10200 INT_INCR_PER_MM Computational resolution for linear positions G2
10210 INT_INCR_PER_DEG Computational resolution for angular positions G2
Axisspecific ($MA_ ... )
31020 ENC_RESOL[n] Encoder pulses per revolution
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