HEIDENHAIN SW 548328-05 DIN Programming - Manual (Page 303)

HEIDENHAIN MANUALplus 620, CNC PILOT 620/640
303
4.1
9
Thr
ead cy
cles
Internal or external threads: See algebraic sign of "U."
Number of cutting passes: The first cut is performed at the cutting
depth defined for "I" and is reduced with each cut until the tool reaches
the "remaining cutting depth R."
Handwheel superposition
(provided that your machine is equipped
accordingly): The superposition is limited to the following range:
 X direction: Depending on the current cutting depth—without
exceeding the starting and end points of the thread.
 Z direction: Maximal 1 thread groove—without exceeding the
starting and end points of the thread.
Definition of taper angle:
 XS/ZS, X/Z
 XS/ZS, Z, W
 ZS, X/Z, W
 Cycle stop—the Control retracts the tool from the
thread groove and then stops all tool movements. (Lift-
off distance: OEM configuration parameter:
cfgGlobalPrperties-threadliftoff)
 If you are programming an internal thread, it is advisable
to preset the thread pitch F since the diameter of the
longitudinal element is not the thread diameter. If you
have Control calculate the thread pitch automatically,
slight deviations may occur.
Cycle run
1
Calculates the number of cutting passes.
2 Executes a thread cut.
3 Returns at rapid traverse and approaches for next pass.
4
Repeats 2 to 3 until the complete thread has been cut.
5 Executes air cuts.
6 Returns to starting point.