HEIDENHAIN TNC 640 (34059x-01) ISO programming - Manual (Page 284)

284 Programming: Q Parameters
8.12 Pr
ogr
amming Examples
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.
%CYLIN G71 *
N10 D00 Q1 P01 +50 * Center in X axis
N20 D00 Q2 P01 +0 * Center in Y axis
N30 D00 Q3 P01 +0 * Center in Z axis
N40 D00 Q4 P01 +90 * Starting angle in space (Z/X plane)
N50 D00 Q5 P01 +270 * End angle in space (Z/X plane)
N60 D00 Q6 P01 +40 * Cylinder radius
N70 D00 Q7 P01 +100 * Length of the cylinder
N80 D00 Q8 P01 +0 * Rotational position in the X/Y plane
N90 D00 Q10 P01 +5 * Allowance for cylinder radius
N100 D00 Q11 P01 +250 * Feed rate for plunging
N110 D00 Q12 P01 +400 * Feed rate for milling
N120 D00 Q13 P01 +90 * Number of cuts
N130 G30 G17 X+0 Y+0 Z-50 * Definition of workpiece blank
N140 G31 G90 X+100 Y+100 Z+0 *
N150 T1 G17 S4000 * Tool call
N160 G00 G40 G90 Z+250 * Retract the tool
N170 L10.0 * Call machining operation
N180 D00 Q10 P01 +0 * Reset allowance
N190 L10.0 Call machining operation
X
Y
50 100
100
Z
Y
X
Z
-50
R40