HEIDENHAIN TNC 640 (34059x-05) Cycle programming - Manual (Page 171)

FACE MILLING (Cycle 233, DIN/ISO: G233) 5.8
5
TNC 640 | User's Manual Cycle Programming | 1/2015
171
Please note while programming:
Pre-position the tool in the machining plane to the
starting position with radius compensation
R0. Keep
in mind the machining direction.
The TNC automatically pre-positions the tool in the
tool axis. Note the
2nd set-up clearance Q204.
Enter the
2nd set-up clearance in Q204 so that no
collision with the workpiece or the fixtures can occur.
If the starting point in the 3rd axis Q227 and the
end point in the 3rd axis Q386 are entered as equal
values, the TNC does not run the cycle (depth = 0
has been programmed).
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 if starting point < end point is
entered. This means that the tool moves at rapid
traverse in the tool axis to set-up clearance below
the workpiece surface!