HEIDENHAIN ITNC 530 - CONVERSATIONAL PROGRAMMING User Manual page 350

Example: Concave cylinder machined with spherical cutter
Program sequence
This program functions only with a spherical
cutter. The tool length refers to the sphere
center.
The contour of the cylinder is approximated by
many short line segments (defined in Q13). The
more line segments you define, the smoother
the curve becomes.
The cylinder is milled in longitudinal cuts (here:
parallel to the Y axis).
The machining direction can be altered by
changing the entries for the starting and end
angles in space:
Clockwise machining direction:
starting angle > end angle
Counterclockwise machining direction:
starting angle < end angle
The tool radius is compensated automatically.
0 BEGIN PGM CYLIN MM
1 Q1 = +50
2 Q2 = +0
3 Q3 = +0
4 Q4 = +90
5 Q5 = +270
6 Q6 = +40
7 Q7 = +100
8 Q8 = +0
9 Q10 = +5
10 Q11 = +250
11 Q12 = +400
12 Q13 = +90
13 BLK FORM 0.1 Z X+0 Y+0 Z-50
14 BLK FORM 0.2 X+100 Y+100 Z+0
15 TOOL CALL 1 Z S4000
16 L Z+250 R0 FMAX
17 CALL LBL 10
18 FN 0: Q10 = +0
19 CALL LBL 10
350
Center in X axis
Center in the Y axis
Center in Z axis
Starting angle in space (Z/X plane)
End angle in space (Z/X plane)
Cylinder radius
Length of the cylinder
Rotational position in the X/Y plane
Allowance for cylinder radius
Feed rate for plunging
Feed rate for milling
Number of cuts
Definition of workpiece blank
Tool call
Retract the tool
Call machining operation
Reset allowance
Call machining operation
Programming: Q Parameters