Siemens SINUMERIK 840D sl Function Manual page 660

Measurement (M5)
Setting zeros, workpiece measuring and tool measuring
$AC_MEAS_TYPE = 17 defines two resulting angles α
these are entered in $AC_MEAS_RESULTS[0..1]:
● $AC_MEAS_RESULTS[0] → Rotation at the abscissa
● $AC_MEAS_RESULTS[1] → Rotation at the ordinate
These angles are calculated by means of the three measuring points P1, P2 and P3. In this
type of measurement the angle for the applicate ($AC_MEAS_RESULTS[2]) is always pre-
filled with 0.
A setpoint rotation that is entered in the result frame can be input for the abscissa and/or the
ordinate. If only one angle is specified with a setpoint, the second angle is calculated such
that the three measuring points are on an oblique plane with the setpoint angle. Only
rotations are entered in the result frame, the WCS reference point is retained. The WCS is
rotated such that z' is perpendicular to the oblique plane.
The following plane settings are defined for measurement type 17:
Axis identifier
Abscissa
Ordinate
Applicate (infeed axis)
The values of the following variables are evaluated for measurement type 17:
Input variable
$AC_MEAS_VALID
$AA_MEAS_POINT1[axis]
$AA_MEAS_POINT2[axis]
$AA_MEAS_POINT3[axis]
$AA_MEAS_SETANGLE[axis]
$AC_MEAS_ACT_PLANE
$AC_MEAS_FRAME_SELECT
$AC_MEAS_T_NUMBER
$AC_MEAS_D_NUMBER
$AC_MEAS_INPUT[0]
$AC_MEAS_TYPE
* optional
660
0
G17 G18
x axis z axis
y axis x axis
z axis y axis
Description
Validity bits for input variables
Measuring point 1
Measuring point 2
Measuring point 3
Setpoint rotations around abscissa and ordinate *
Calculated as active plane unless otherwise specified *
Calculated as additive frame unless otherwise specified *
Calculated as active T unless otherwise specified (T0) *
Calculated as active D unless otherwise specified (D0) *
Unless otherwise specified,
the points are not projected in a plane *
0: Points are not projected on a plane
1: Points are projected in the active plane or in the selected
plane
17
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
and α for the skew of the plane;
1
G19
y axis
z axis
x axis
Extended Functions