HEIDENHAIN ITNC 530 - CYCLE PROGRAMMING User Manual page 92

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 for the cycle parameter DEPTH
determines the working direction. If you program DEPTH
= 0, the cycle will not be executed.
If you enter advance stop distances Q258 not equal to Q259,
the TNC will change the advance stop distances between
the first and last plunging depths at the same rate.
If you use Q379 to enter a deepened starting point, the TNC
merely changes the starting point of the infeed
movement. Retraction movements are not changed by
the TNC, therefore they are calculated with respect to the
coordinate of the workpiece surface.
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 setup clearance below the workpiece surface!
92 Fixed Cycles: Drilling