HEIDENHAIN iTNC 530 (60642x-03) ISO programming - Manual (Page 322)

322 Programming: Q parameters
9.1
1
Pr
ogr
amming examples
Example: Convex sphere machined with end mill
Program sequence
 This program requires an end mill.
 The contour of the sphere is approximated by
many short lines (in the Z/X plane, defined in
Q14). The smaller you define the angle
increment, the smoother the curve becomes.
 You can determine the number of contour cuts
through the angle increment in the plane
(defined in Q18).
 The tool moves upward in three-dimensional
cuts.
 The tool radius is compensated automatically.
%SPHERE G71 *
N10 Q1 = +50 * Center in X axis
N20 Q2 = +50 * Center in Y axis
N30 Q4 = +90 * Starting angle in space (Z/X plane)
N40 Q5 = +0 * End angle in space (Z/X plane)
N50 Q14 = +5 * Angle increment in space
N60 Q6 = +45 * Sphere radius
N70 Q8 = +0 * Starting angle of rotational position in the X/Y plane
N80 Q9 = +360 * End angle of rotational position in the X/Y plane
N90 Q18 = +10 * Angle increment in the X/Y plane for roughing
N100 Q10 = +5 * Allowance in sphere radius for roughing
N110 Q11 = +2 * Set-up clearance for pre-positioning in the spindle axis
N120 Q12 = +350 * Feed rate for milling
N130 G30 G17 X+0 Y+0 Z-50 * Definition of workpiece blank
N140 G31 G90 X+100 Y+100 Z+0 *
N160 T1 G17 S4000 * Tool call
N170 G00 G40 G90 Z+250 * Retract the tool
X
Y
50 100
100
Z
Y
-50
R45
50
R45