Siemens SINUMERIK 840D sl Programming Manual page 96

Measuring variants
3.2 Measure workpiece (turning)
Figure 3-4
Positioning "Travel below the center" (CYCLE994)
For "Travel below the center", the inside diameter of the workpiece is measured using a 2-point
measurement with the measuring cycle CYCLE994 . Two opposite measuring points
symmetrical to the workpiece zero (center of rotation) are approached at a distance of the
setpoint specified by the user.
A protection zone can be programmed, which should be taken into account when traversing.
The user must take into account the ball radius of the probe when dimensioning the protection
zone.
Figure 3-5
Measuring with reversal of the workpiece (CYCLE974)
With this measuring variant, the actual value of a workpiece with reference to the workpiece
zero in the measuring axis is determined by acquiring two opposite points on the diameter.
The workpiece is positioned by the cycle before the first measurement at the angular position
programmed in parameter α0. After the 1st measurement, the cycle also automatically
96
Measure: Inside diameter (CYCLE974)
Positions of the probe when measuring the inside diameter using 2-point measurement
(CYCLE994)
Programming Manual, 12/2017, 6FC5398-4BP40-6BA1
Measuring cycles