Example: Concave Cylinder Machined With Spherical Cutter - HEIDENHAIN TNC 320 User Manual

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 milling direction is determined with the starting
angle and end angle in space :
Machining direction clockwise:
Starting angle > end angle
Machining direction counterclockwise:
Starting angle < end angle
The tool radius is compensated automatically.
0 BEGIN PGM CYLIN MM
1 FN 0: Q1 = +50
2 FN 0: Q2 = +0
3 FN 0: Q3 = +0
4 FN 0: Q4 = +90
5 FN 0: Q5 = +270
6 FN 0: Q6 = +40
7 FN 0: Q7 = +100
8 FN 0: Q8 = +0
9 FN 0: Q10 = +5
10 FN 0: Q11 = +250
11 FN 0: Q12 = +400
12 FN 0: 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
20 L Z+100 R0 FMAX M2
TNC 320 | User's Manual HEIDENHAIN Conversational Programming | 5/2013
Programming examples 8.13
Center in X axis
Center in 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
Retract the tool, end program
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