HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 358)

358 Cycles: Turning
13.23 THREAD EXTENDED (Cy
c
le
832)
U Taper angle Q469: Taper angle of contour
U Runout of thread Q474: Length of the path on which,
at the end of the thread, the tool is lifted from the
current plunging depth to the thread diameter Q460.
U Approach path Q465: Length of the path in pitch
direction on which the feed axes are accelerated to
the required velocity. The approach path is outside of
the defined thread contour.
U Overrun path Q466: Length of the path in pitch
direction on which the feed axes are decelerated. The
overrun path is within the defined thread contour.
U Maximum cutting depth Q453: Maximum plunging
depth perpendicular to the thread pitch
U Angle of infeed Q467: Angle for the infeed Q453. The
reference angle is formed by the parallel line to the
thread pitch.
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 832 THREAD EXTENDED
Q471=+0 ;THREAD POSITION
Q461=+0 ;THREAD ORIENTATION
Q460=+2 ;SET-UP CLEARANCE
Q472=+2 ;PITCH
Q473=+0 ;THREAD DEPTH
Q464=+0 ;DIMENSION TYPE TAPER
Q491=+100 ;DIAMETER AT CONTOUR START
Q492=+0 ;CONTOUR START IN Z
Q493=+110 ;DIAMETER AT END OF CONTOUR
Q494=-35 ;CONTOUR END IN Z
Q469=+0 ;TAPER ANGLE
Q474=+0 ;THREAD RUN-OUT
Q465=+4 ;APPROACH PATH
Q466=+4 ;OVERRUN PATH
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