Ncu Link With Different Interpolation Cycles; 2.15.10.1 Example Of Eccentric Turning - Siemens SINUMERIK 840D sl Function Manual

B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl
2.15 Examples
2.15.10

NCU link with different interpolation cycles

2.15.10.1 Example of eccentric turning

Task assignment
Create a non-circular shape with the following characteristics:
Ellipticity: 0.2 mm
Base circle diameter: 50 mm
Z path per revolution: 0.1 mm
Spindle speed: 3000 rpm
A sinusoidal approximation via a cubic polynomial per 45 degrees of spindle revolution
should be sufficient for the required precision.
Note
Polynomials up to the 5th degree can be used. See Programming Manual Job Planning.
The part program of which excerpts are shown runs in a channel of the NCU with the faster
interpolation cycle where the X axis is configured as local axis and the C and Z axes as link
axes.
CAD systems which calculate coefficients based on contour points and the required degree
of the polynomial are used for defining the polynomial coefficients.
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Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions