HEIDENHAIN TNC 620 (34056x-04) Cycle programming - Manual (Page 81)

UNIVERSAL PECKING (Cycle 205, DIN/ISO: G205, software option
19)
3.8
3
TNC 620 | User's Manual Cycle Programming | 5/2013
81
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 different advance stop distances for
Q258 and 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!
Use the machine parameter displayDepthErr to
define whether, if a positive depth is entered, the
TNC should output an error message (on) or not (off).
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!