HEIDENHAIN iTNC 530 (340 49x-04) - Manual (Page 383)

HEIDENHAIN iTNC 530 383
8.5 Cy
cles f
o
r Dr
illing, T
a
pping and Thr
ead Milling
Before programming, note the following
Program a positioning block for the starting point (hole
center) in the working plane with radius compensation R0.
The algebraic sign for the parameter thread depth
determines the working direction.
The TNC calculates the feed rate from the spindle speed.
If the spindle speed override is used during tapping, the
feed rate is automatically adjusted.
The feed-rate override knob is disabled.
At the end of the cycle the spindle comes to a stop. Before
the next operation, restart the spindle with M3 (or M4).
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.
Danger of collision!
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
at safety clearance below the workpiece surface!