Siemens SINUMERIK 840D sl Programming Manual page 125

The same calibration data is generated as for calibration in the ring:
● Inclined position of the workpiece probe
● Trigger values
● Radius of the probe ball
In addition, the probe length in the tool axis can be determined based on the machine data.
MD51740 $MNS_MEA_FUNCTION_MASK, bit 1 (probe ball center or ball circumference)
The calibration sphere center is determined as supplementary result.
Note
For the version "Positioning on circular path", positioning through 90° is always in the
mathematical positive direction.
Measuring principle
The measurement sequence is divided into the following steps:
1. Determining the center point coordinates of the reference sphere
2. Determining the calibration data
This procedure can be made parallel to the axis by passing or moving around the reference
sphere.
Figure 3-10
Requirements
● The diameter of the reference sphere must be known.
● Tool type of the probe:
– 3D multi probe (type 710)
– Mono probe (type 712)
● SPOS-capable spindle required.
Measuring cycles
Programming Manual, 12/2017, 6FC5398-4BP40-6BA1
Calibration at the sphere (CYCLE976), example of overtravel (intermediate positioning
parallel to the axis)
Measuring variants
3.3 Measure workpiece (milling)
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