Np_Ang - Siemens SINUMERIK 840D sl Function Manual

6.2.4.13

$NP_ANG

Function
The angle through which the local coordinate system of the protection area element is rotated
around the direction vector ($NP_DIR (Page 247)) compared to the coordinate system of the
previous protection area element should be entered in the system variable.
Syntax
$NP_ANG[<n>] = <value>
Meaning
$NP_ANG:
<n>:
<value>:
Example
The local coordinate system of the 19th protection area element is rotated by the angle by
δ=45.0° around the direction vector compared to the coordinate system of the previous
protection area element. The direction vector is the unit vector (1; 0; 0), rotated through
α=90° in the X/Y plane and β=10° in the Y/Z plane, in relation to the world coordinate system.
The following values result from this for the individual components of the direction vector:
● X component = cos(α) * cos(β) = cos(90) * cos(10) = 0.0
● Y component = sin(α) * cos(β) = sin(90) * cos(10) ≈ 0.985
● Z component = sin(β) = sin(10) ≈ 0.174
● Angle δ = 45.0°
Special functions
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Angle of rotation
Data type: REAL
Range of values: -360° < x ≤ 360°
Default value: 0.0
System variable or protection area element index
Data type: INT
Range of values: 0, 1, 2, ... ($MN_MM_MAXNUM_3D_PROT_AREA_ELEM -
1)
Angle
Data type: REAL
K8: Geometric machine modeling - only 840D sl
6.2 Commissioning
249