HEIDENHAIN TNC 407 (280 580) User Manual User Manual
Page 248
8-41
8
Cycles
TNC 407/TNC 415 B/TNC 425
Fig. 8.43:
The unrolled surface of the cylinder:
L = Diameter of cylinder * 3.14
Fig. 8.42:
Contour on a cylindrical surface
CYLINDER SURFACE (Cycle 27)
The machine tool and the TNC must be prepared by the machine tool manufacturer for the use of cycle 27
Process
This cycle enables you to program a contour in two
dimensions and then machine it on a cylindrical
surface.
The contour is described in a subprogram identified
in cycle 14 (CONTOUR GEOM.).
The subprogram contains coordinates in a rotary
axis and in its parallel axis. The rotary axis C, for
example, has Z as its parallel axis. The path
functions L, CHF, CR, RND are available for
programming.
The dimensions in the rotary axis can be entered
as desired either in degrees or in mm (inch). You
can select the desired dimension type in the cycle
definition.
L
Cycle 27 CYLINDER SURFACE should not be used for closed contours. The beginning and the end of a closed
contour should not fall at the same corner point.