Siemens SINUMERIK 808D User Manual page 312

Pa rameters for p rogramming circular arcs
① Direction of rotation of the circular arc: clockwise or counter-clockwise
② Radius of circle
③
Absolute (abs)/incremental (inc) end positions in X and Y directions
④ Absolute (abs)/incremental (inc) positions of circle center point in Y (I) and X (K) directions
⑤
The contour chain which displays the start point and programmed contour elements. The current position in the chain
is color-highlighted.
⑥
The graphics window which displays the progress of the contour as you configure the parameters for the contour ele-
ments.
The following additional parameters are displayed after you press this softkey:
Pa rameter D e scription
α1 Starting angle with reference to Y axis
α2 Angle to preceding element; tangential transition: α2=0
β1 End angle with reference to Y axis
β2 Angle of aperture of circle
Ma chine manufacturer
The names of the identifiers (X or Y ...) are defined in the machine data where they can also be changed.
Tra nsition to next element
A transition element can be used whenever there is a point of intersection between two neighboring elements; this can be
calculated from the input values.
You can choose to insert either a radius (RND), a chamfer (CHR) or an undercut as the transition element between any two
contour elements. The transition is always appended to the end of a contour element. You select transition elements in the
parameter input screen for the relevant contour element.
R a dius or chamfer at the start or the end of a turning contour:
In simple turning contours a chamfer or radius must often be appended at the start and end of the contour.
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Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017