HEIDENHAIN TNC 426 (280 476) - Manual (Page 183)

156 6 Programming: Programming Contours
6.5 P
ath Cont
ours
—
P
olar Coor
dinat
e
s
To cut a thread with more than 16 revolutions
Example: Helix
0 BEGIN PGM HELIX MM
1 BLK FORM 0.1 Z X+0 Y+0 Z-20 Define the workpiece blank
2 BLK FORM 0.2 X+100 Y+100 Z+0
3 TOOL DEF 1 L+0 R+5 Define the tool
4 TOOL CALL 1 Z S1400 Tool call
5 L Z+250 R0 F MAX Retract the tool
6 L X+50 Y+50 R0 F MAX Pre-position the tool
7 CC Transfer the last programmed position as the pole
8 L Z-12.75 R0 F1000 M3 Move to working depth
9 APPR PCT PR+32 PA-180 CCA180 R+2 Approach the contour on a circular arc with tangential
RL F100 connection
10 CP IPA+3240 IZ+13.5 DR+ F200 Helical interpolation
11 DEP CT CCA180 R+2 Depart the contour on a circular arc with tangential connection
12 L Z+250 R0 F MAX M2 Retract in the tool axis, end program
13 END PGM HELIX MM
X
Y
50
50
CC
100
100
M64 x 1,5
...
8 L Z-12.75 R0 F1000
9 APPR PCT PR+32 PA-180 CCA180 R+2 RL F100