HEIDENHAIN TNC 640 User Manual page 475

Cycles: Turning | CONTOUR-PARALLEL THREAD
(Cycle 830, DIN/ISO: G830)
Q465 Starting path? (incremental): Length of the
path in pitch direction on which the feed axes are
accelerated to the required velocity. The starting
path is outside of the defined thread contour.
Q466 Overrun path?: Length of the path in pitch
direction on which the feed axes are decelerated.
The overrun path is within the defined thread
contour
Q463 Maximum cutting depth?: Maximum
plunging depth perpendicular to thread pitch
Q467 Feed angle?: Angle at which the Q463
infeed is performed. The reference angle is formed
by the parallel line to the thread pitch
Q468 Infeed type (0/1)?: Define the type of
infeed:
0: Constant chip cross section (infeed lessens with
depth)
1: Constant plunging depth
Q470 Starting angle?: Angle of the turning spindle
at which the thread start is to be made.
Q475 Number of thread grooves?: Number of
thread grooves
Q476 Number of air cuts?: Number of air cuts
without infeed at finished thread depth
HEIDENHAIN | User's manual for cycle programming | 10/2017
Q474
Q465
NC blocks
9 CYCL DEF 14.0 CONTOUR
10 CYCL DEF 14.1 CONTOUR LABEL2
11 CYCL DEF 830 THREAD CONTOUR-
PARALLEL
Q471=+0 ;THREAD POSITION
Q461=+0 ;THREAD ORIENTATION
Q460=+2 ;SAFETY CLEARANCE
Q472=+2 ;THREAD PITCH
Q473=+0 ;DEPTH OF THREAD
Q474=+0 ;THREAD RUN-OUT
Q465=+4 ;STARTING PATH
Q466=+4 ;OVERRUN PATH
Q463=+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
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
12
475