HEIDENHAIN iTNC 530 (60642x-04) Cycle programming - Manual (Page 127)

HEIDENHAIN iTNC 530 127
4.9 HELICAL THREAD DRILLING/MI
LLING (Cy
c
le 265, DIN/ISO:
G265)
Please note while programming:
Program a positioning block for the starting point (hole
center) in the working plane with radius compensation R0.
The algebraic sign of the cycle parameters thread depth or
depth at front determines the working direction. The
working direction is defined in the following sequence:
1 Thread depth
2 Depth at front
If you program a depth parameter to be 0, the TNC does
not execute that step.
If you change the thread depth, the TNC automatically
changes the starting point for the helical movement.
The type of milling (up-cut/climb) is determined by the
thread (right-hand/left-hand) and the direction of tool
rotation, since it is only possible to work in the direction of
the tool.
Danger of collision!
Enter in MP7441 bit 2 whether the TNC should output an
error message (bit 2=1) or not (bit 2=0) if a positive depth
is entered.
Keep in mind that the TNC reverses the calculation for pre-
positioning when a positive depth is entered. This
means that the tool moves at rapid traverse in the tool axis
to set-up clearance below the workpiece surface!
Enter in MP7441 bit 0 whether the TNC should output an
error message (bit 0=0) or not (bit 0=1) if spindle rotation
is not active when the cycle is called. The function also
needs to be adapted by your machine manufacturer.