HEIDENHAIN iTNC 530 (340 49x-01) - Manual (Page 277)

HEIDENHAIN iTNC 530 277
8.3 Cy
cles f
o
r Dr
illing, T
a
pping and Thr
ead Milling
DRILLING (Cycle 200)
1 The TNC positions the tool in the tool axis at rapid traverse FMAX
to set-up clearance above the workpiece surface.
2 The tool drills to the first plunging depth at the programmed feed
rate F.
3 The TNC returns the tool at FMAX to the set-up clearance, dwells
there (if a dwell time was entered), and then moves at FMAX to
the set-up clearance above the first plunging depth.
4 The tool then drills deeper by the plunging depth at the
programmed feed rate F.
5 The TNC repeats this process (2 to 4) until the programmed total
hole depth is reached.
6 At the hole bottom, the tool path is retraced to set-up clearance
or—if programmed—to the 2nd set-up clearance in rapid traverse
FMAX.
X
Z
Q200
Q201
Q206
Q202
Q210
Q203
Q204
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 cycle parameter DEPTH
determines the working direction. If you program
DEPTH = 0, the cycle will not be executed.
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!