Siemens SINUMERIK 840D sl Programming Manual page 212

Measuring variants
3.3 Measure workpiece (milling)
Requirements
● The precision of the calibration ball should be better than 0.001 mm.
● An electronic program is loaded into the spindle with the longest possible stylus tip (>100
mm).
● The probe shaft should have a good surface quality (e.g. ground steel shaft).
Starting position before the measurement
Before the cycle is called, the probe must be positioned at the distance of the measuring path
(DFA) above the mounted calibration ball (North Pole) so that this can be approached without
any collisions at the circumference (equator).
Position after the end of the measuring cycle
The probe is located after the measuring cycle at the start position. In the probe direction (for
G17 Z), the probe is at the distance of the measuring path (DFA) above the north pole.
Procedure
The part program to be processed has been created and you are in the editor.
Parameter
G code program
Parameter Description
PL Measuring plane (G17 - G19)
Calibration data set (1 - 40)
Det. sphere diam. Determining the sphere diameter
● No
● Yes
∅ Sphere diameter
α0 Contact angle
DZ Depth infeed for 2nd measurement
DFA Measurement path
TSA Safe area for the measurement result
212
1. Press the "Meas. workpiece" softkey.
2. Press the "3D" softkey.
3. Press the "Spindle angular displacement" softkey.
The input window "Measure: Spindle angular deviation" opens.
Programming Manual, 12/2017, 6FC5398-4BP40-6BA1
Unit
-
-
-
mm
Degrees
mm
mm
mm
Measuring cycles