HEIDENHAIN TNC 370 - Page 232

8 Cycles
L
8.5 SL Cycles
Example: Roughing out a rectangular pocket
Rectangular pocket with rounded corners
Tool: center-cut end mill (IS0 1641),
radius 5 mm.
Coordinates of the island corners:
X Y
0
70 mm 60 mm
0
15 mm 60 mm
g
15 mm 20 mm
70 mm 20 mm
Coordinates of the auxiliary pocket:
X Y
8
-5 mm -5 mm
0
105 mm -5 mm
g
105 mm 105 mm
-5 mm 105 mm
Starting point for machining:
@ X=40 mm Y=60 mm
Setup clearance: 2 mm
Milling depth: 15 mm
Pecking depth: 8 mm
Feed rate for pecking: 100 mm/min
Finishing allowance: 0
Direction angle for rough-out:
O”
Milling feed rate: 500 mm/min
Cycle in a part program
0 BEGIN PGM 360819 MM
1 BLK FORM 0.1 Z X+0 Y+O Z-20
2 BLK FORM 0.2 X+100 Y+lOO Z+O
3 TOOL DEF 1 L+O R+3
4 TOOL CALL 1 Z SIOOO
5 CYCL DEF 14.0 CONTOUR GEOM.
6
CYCL DEF 14.1 CONTOUR LABEL 2/l
7 CYCL DEF 6.0
ROUGH-OUT . . . . . . . . . . . . . . . . . . . . . . . . Cycle definition ROUGH-OUT
8
CYCL DEF 6.1 SET UP 2 DEPTH -15
9 CYCL DEF 6.2 PECKG 8 FIOO ALLOW +0
10 CYCL DEF 6.3 ANGLE +0 F500
11 L Z+lOO RO FMAX M6
12
L X+40 Y+50 FMAX M3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pre-positioning
in X, Y, spindle on
13 L Z+2 FMAX M99 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pre-positioning
in Z, cycle call
14 L Z+lOO FMAX M2
15 LBL 1
16
L X+40 Y+60 RR
17 L x+15
18 RND RI2
19
L Y+20
20 RND RI2
21 L x+70
22 RND RI2
23 L Y+60
24 RND RI2
25 L x+40
26 LBL 0
27 LBL 2
28 L X-5 Y-5 RL
29 L x+105
30
L Y+105
31 L x-5
32 L Y-5
33 LBL 0
34 END PGM 360819 MM
Subprogram 1:
Geometry of the island
(From radius compensation RR and counterclockwise
machining, the control concludes that contour element
1 is an island)
Subprogram 2:
Geometry of the auxiliary pocket
External limitation of the machined surface
(From radius compensation RL and counterclock-
wise machining, the control concludes that contour
element 2 is a pocket)
TNC 370
8-43