HEIDENHAIN TNC 640 (34059x-02) Cycle programming - Manual (Page 382)

Cycles: Turning
13.30 CONTOUR-PARALLEL THREAD
(Cycle 830, DIN/ISO: G830)
13
382
TNC 640 | User's Manual Cycle Programming | 5/2013
Approach path Q465 (incremental): 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.
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.
Maximum cutting depth Q463: Maximum plunging
depth perpendicular to the thread pitch
Angle of infeed Q467: Angle for the infeed Q463.
The reference angle is formed by the parallel line to
the thread pitch.
Type of infeed Q468: Define the type of infeed:
0 : Constant chip cross section (infeed lessens with
depth)
1 : Constant plunging depth
Starting angle Q470: Angle of the turning spindle at
which the thread start is to be made.
Number of starts Q475: Number of thread starts
Number of air cuts Q476: Number of air cuts
without infeed at finished thread depth
NC blocks
9 CYCL DEF 14.0 CONTOUR
10 CYCL DEF 14.1 CONTOUR LABEL2
11 CYCL DEF 830 CONTOUR-PARALLEL
THREAD
Q471=+0 ;THREAD POSITION
Q461=+0 ;THREAD ORIENTATION
Q460=+2 ;SET-UP CLEARANCE
Q472=+2 ;THREAD PITCH
Q473=+0 ;THREAD DEPTH
Q474=+0 ;RUNOUT OF THREAD
Q465=+4 ;APPROACH PATH
Q466=+4 ;OVERRUN PATH
Q463=+0.5 ;MAX. CUTTING DEPTH
Q467=+30 ;ANGLE OF INFEED
Q468=+0 ;TYPE OF INFEED
Q470=+0 ;START ANGLE
Q475=+30 ;NUMBER OF STARTS
Q476=+30 ;NO. OF AIR CUTS
12 L X+80 Y+0 Z+2 FMAX M303
13 CYCL CALL
14 M30
15 LBL 2
16 L X+60 Z+0
17 L X+70 Z-30
18 RND R60
19 L Z-45
20 LBL 0