Siemens SINUMERIK Series Function Manual page 489

Measurement of plane
The plane is measured in one measuring cycle. The cycle records the three measuring
points and passes the necessary values to the variable interface.
The MEASURE() function calculates the solid angles and translational offset of the new
WCS' on the basis of the input values.
Transformation of measuring frame
The results of the calculation, i.e. the solid angles and translation, are entered in measuring
frame $AC_MEAS_FRAME. The measuring frame is transformed according to the selected
frame in the frame chain. The solid angles are also stored in the output values
$AC_MEAS_RESULTS[0..2]. In
● The angle around the abscissa of the old WCS is stored in $AC_MEAS_RESULTS[0],
● The angle around the ordinate is stored in $AC_MEAS_RESULTS[1] and
● The angle around the applicate is stored in $AC_MEAS_RESULTS[2].
Define the new WCS' zero
After performing the calculation, the measuring cycle can write and activate the selected
frame in the frame chain with the measuring frame. After activation, the new WCS is
positioned at surface normal on the inclined plane, with measuring point P1 as the zero point
of the new WCS.
The programmed positions then refer to the inclined plane.
Application
CAD systems often define inclined planes by specifying three points P1, P2 and P3 on this
plane. In this case,
● 1. measuring point P1 is applied as the new WCS' reference point,
● 2. Measuring point P2 defines the direction of the abscissa x' of the newly rotated WCS'
● 3. measuring point P3 is used to determine the solid angles.
The values of the following variables are evaluated for measurement type 18:
Input variable
$AC_MEAS_VALID
$AA_MEAS_POINT1[axis]
$AA_MEAS_POINT2[axis]
$AA_MEAS_POINT3[axis]
$AA_MEAS_SETPOINT[axis]
$AC_MEAS_ACT_PLANE
$AC_MEAS_FRAME_SELECT
$AC_MEAS_T_NUMBER
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
coordinate system and the
7.5 Setting zeros, workpiece measuring and tool measuring
Meaning
Validity bits for input variables
Measuring point 1
Measuring point 2
Measuring point 3
Setpoint position of P1 *
Calculated as active plane unless otherwise specified *
Calculated as additive frame unless otherwise specified *
Calculated as active T unless otherwise specified (T0) *
M5: Measurement
489