Example: Concave Cylinder Machined With Spherical Cutter - HEIDENHAIN TNC 426 B User Manual

Example: Concave cylinder machined with spherical cutter

Example: Concave cylinder machined with spherical cutter
Program sequence
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
FN 0: Q = +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 = + 00
8 FN 0: Q8 = +0
9 FN 0: Q 0 = +5
0 FN 0: Q = +250
FN 0: Q 2 = +400
2 FN 0: Q 3 = +90
3 BLK FORM 0. Z X+0 Y+0 Z-50
4 BLK FORM 0.2 X+ 00 Y+ 00 Z+0
5 TOOL DEF L+0 R+3
6 TOOL CALL Z S4000
7 L Z+250 R0 F MAX
8 CALL LBL 0
9 FN 0: Q 0 = +0
20 CALL LBL 0
2 L Z+ 00 R0 F MAX M2
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Z
-50
Y
100
50
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)
Radius of the cylinder
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
Define the workpiece blank
Define the tool
Call the tool
Retract the tool
Call machining operation
Reset allowance
Call machining operation
Retract in the tool axis, end program
X
Y
X Z
100
10 Programming: Q Parameters