HEIDENHAIN TNC 370 - Page 110

5 Programming Tool Movements
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5.4 Path Contours - Cartesian Coordinates
Example for exercise: Milling a rectangle
Coordinates of the corner points:
.@ X = 5mm Y = 5mm
OX = 5mm Y = 95 mm
@ X = 95 mm Y = 95 mm
@ X = 95 mm Y = 5 mm
Milling depth: Z =-IO mm
Part program
0
BEGIN
PGM 36051 1 MM ................................... Begin program; program number 36051 1; dimensions in
millimeters
1 BLK FORM 0.1 Z X+0 Y+O Z-20
2 BLK FORM 0.2 X+100 Y+lOO Z+O ..................... Define blank form for graphic workpiece simulation
(MIN and MAX point)
3 TOOL DEF 1 L+O R+5
4 TOOL CALL 1 Z SIOOO ....................................... Define tool in the program; call tool in the spindle axis Z;
spindle speed S = 1000 rpm
5 L Z+lOO RO FMAX M6
....................................... Retract in the spindle axis; rapid traverse; insert tool
6 L X-l 0 Y-l 0 FMAX.. ........................................... Pre-position in X and Y; rapid traverse
7 L Z-l 0 FMAX M3 ............................................... Move to working depth; rapid traverse; spindle ON with
clockwise rotation
8
L X+5 Y+5 RL FIOO
............................................
Move to first contour point-corner point ($ -with radius
compensation (RL) and reduced feed rate (F 100)
9 L Y+95 ................................................................ Move to second contour point - corner point 0: all
values that remain the same as in block 8 need not be
reprogrammed
10 L X+95 ................................................................ Move to third contour point - corner point @
11 L Y+5 .................................................................. Move to fourth contour point - corner point @
12 L X+5 Y+5 .......................................................... Conclude milling, return to first contour point
13 L X-l 0 Y-l 0 RO FMAX ....................................... For safety reasons, retract in X and Y; rapid traverse
14 L Z+lOO FMAX M2 ............................................. Move tool to setup clearance; rapid traverse;
spindle OFF, coolant OFF, STOP program run,
Return jump to block 1
15 END PGM 36051 1 MM ...................................... End of program
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TNC 370 5-l 1