HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 354)

354 Cycles: Turning
13.22 L
ONGITUDINAL THREAD (Cy
c
le 831)
U Type of infeed Q468: Define the type of infeed:
0: Constant chip cross section (the infeed decreases
with the depth)
1: Constant plunging depth
U Starting angle Q470: Angle of the turning spindle at
which the thread start is to be made.
U Number of starts Q475: Number of thread starts
U Number of air cuts Q476: Number of air cuts without
infeed at finished thread depth
Example: NC blocks
11 CYCL DEF 831 LONGITUDINAL THREAD
Q471=+0 ;THREAD POSITION
Q460=+5 ;SET-UP CLEARANCE
Q460=+75 ;THREAD DIAMETER
Q472=+2 ;PITCH
Q473=+0 ;THREAD DEPTH
Q492=+0 ;CONTOUR START IN Z
Q494=-15 ;CONTOUR END IN Z
Q474=+0 ;THREAD RUN-OUT
Q453=+0.5 ;MAX. CUTTING DEPTH
Q467=+30 ;ANGLE OF INFEED
Q468=+0 ;TYPE OF INFEED
Q470=+0 ;STARTING ANGLE
Q475=+30 ;NUMBER OF STARTS
Q476=+30 ;NUMBER OF AIR CUTS
12 L X+80 Y+0 Z+2 FMAX M303
13 CYCL CALL