HEIDENHAIN TNC 640 (34059x-05) Cycle programming - Manual (Page 167)

FACE MILLING (Cycle 233, DIN/ISO: G233) 5.8
5
TNC 640 | User's Manual Cycle Programming | 1/2015
167
5.8 FACE MILLING (Cycle 233, DIN/ISO:
G233)
Cycle run
Cycle 233 is used to face mill a level surface in multiple infeeds
while taking the finishing allowance into account. You can also
define side walls in the cycle, which are then taken into account
when machining the level surface. The cycle offers you various
machining strategies:
Strategy Q389=0 : Meander machining, stepover outside the
surface being machined
Strategy Q389=1 : Meander machining, stepover at the edge of
the surface being machined
Strategy Q389=2 : The surface is machined line by line with
overtravel; stepover when retracting at rapid traverse
Strategy Q389=3 : The surface is machined line by line without
overtravel; stepover when retracting at rapid traverse
Strategy Q389=4 : Helical machining from the outside toward
the inside
1 From the current position, the TNC positions the tool at rapid
traverse FMAX to the starting point 1 in the working plane: The
starting point in the working plane is offset from the edge of
the workpiece by the tool radius and the safety clearance to the
side.
2 The TNC then positions the tool at rapid traverse
FMAX to the
set-up clearance in the spindle axis.
3 The tool then moves in the tool axis at the feed rate for milling
Q207 to the first plunging depth calculated by the TNC.