HEIDENHAIN TNC 370 User Manual page 251

8 Cycles
8.7 Cycles for Coordinate Transformations
Example: Datum shift
A machining sequence in the form of a
subprogram is to be executed twice:
a) once, referenced to the specified datum @
X+O/Y+O and
b) a second time, referenced to the shifted
datum @ X+4O/Y+60.
Cycle in a part program
3 BEGIN PGM 360833 MM
1 BLK FORM 0.1 Z X+0 Y+O Z-20
2 BLK FORM 0.2 X+1 00 Y+lOO Z+O
3 TOOL DEF 1 L+O R+4
4 TOOL CALL 1 Z SIOOO
5 L Z+lOO RO FMAX
3 CALL LBL 1 _..,......................,............................. Without a datum shift
7 CYCL DEF 7.0 DATUM SHIFT
3 CYCL DEF 7.1 X+40
3 CYCL DEF 7.2 Y+60
10 CALL LBL 1 _...................................................,... With a datum shift
11 CYCL DEF 7.0 DATUM
SHIFT . . . . . . . . . . . . . . . . ..___.._.. Cancellation of datum shift
12 CYCL DEF 7.1 X+0
13 CYCL DEF 7.2 Y+O
14 L Z+lOO RO FMAX M2
15 LBLI
16 LX-IO Y-IO RO FMAX M3
17 LZ+2FMAX
18 L Z-5 F200
19 LX+OY+O RL
20 LY+20
21 LX+25
Subprogram for the geometry of the original contour
22 L x+30 Y+15
23 LY+O
24 LX+0
25 LX-IO Y-IO RO
26 L Z+2 FMAX
27 LBL 0
28 END PGM 360833 MM
The location of the subprogram (NC block) depends on the transfor-
mation cycle:
LBL 1
LBL 0
Datum shift Block 15 Block 27
Mirror image, rotation, scaling Block 19 Block 31
8-62 TNC 370 -