HEIDENHAIN MANUALplus 4110 - Manual (Page 265)

HEIDENHAIN MANUALplus 4110 265
5.5 ICP Cont
our Elements, T
u
rn
ing Cont
our
Undercuts, turning contour
Select form elements.
Select thread undercut DIN 76.
For thread undercut DIN 76, the diameter of the longitudinal element
represents the thread diameter (or, with internal threads, the core
diameter).
Parameters
 XS, ZS starting point in X/Z: Starting point of undercut
 X, Z target point in X/Z: End point of undercut
 FP thread pitch —default: Value from standard table
 I undercut diameter —default: Value from standard table
 K undercut length —default: Value from standard table
 W undercut angle —default: Value from standard table
 R undercut radius —default: Value from standard table
 J element position —default: 1
„ J=1: Undercut starts with the longitudinal element and ends with
the transverse element.
„ J=–1: Undercut starts with the transverse element and ends with
the longitudinal element.
 F special feed
Parameters that are not defined are automatically calculated from the
standard table (see “DIN 76—undercut parameters” on page 525):
„ The "thread pitch FP" is determined from the diameter ("starting
point XS").
„ The parameters I, K, W, and R are calculated from the thread pitch
FP.
Thread undercut DIN 76
„ If you are programming an internal thread, it is advisable
to preset the "thread pitch FP," since the diameter of the
longitudinal element is not the thread diameter. If you
have MANUALplus calculate the thread pitch
automatically, slight deviations may occur.
„ The "element position J" cannot be entered when
superimposing the undercut and cannot be changed
when programming changes to ICP contours. (The
contour corner has already been clearly defined.)