Calibrate Probe - Calibrate On Ball (Cycle976) - Siemens SINUMERIK 840D sl Programming Manual

2.3.4

Calibrate probe - calibrate on ball (CYCLE976)

Function
Using this measuring version, a workpiece probe can be calibrated at any position in space.
This has a special meaning in conjunction with swivel functions and transformations.
The same calibration data are generated as for calibration in the ring: the skew of the
workpiece probe, the trigger values and the radius of the probe ball. In addition, the probe
length in the tool axis can be determined. This can be realized with reference to the probe
ball end or ball circumference.
The calibration ball center is determined as supplementary result.
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 2-10
Preconditions
● The diameter of the reference ball must be known.
● Tool type of the probe:
Starting position before the measurement
The workpiece probe must be positioned above the reference sphere so that it can be
approached collision-free from above and at the circumference.
Measuring cycles
Programming Manual, 02/2011, 6FC5398-4BP40-0BA0
Calibration at the ball (CYCLE976), example, passing (intermediate positioning parallel
to the axis)
– 3D multi probe (type 710)
– Mono probe (type 712)
– Star-type probe (type 714)
Measuring variants
2.3 Measure workpiece (milling)
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