HEIDENHAIN TNC 640 (34059x-01) ISO programming - Manual (Page 282)

282 Programming: Q Parameters
8.12 Pr
ogr
amming Examples
8.12 Programming Examples
Example: Ellipse
Program sequence
„ The contour of the ellipse is approximated by
many short lines (defined in Q7). The more
calculation steps you define for the lines, the
smoother the curve becomes.
„ The machining direction can be altered by
changing the entries for the starting and end
angles in the plane:
Clockwise machining direction:
starting angle > end angle
Counterclockwise machining direction:
starting angle < end angle
„ The tool radius is not taken into account.
%ELLIPSE G71 *
N10 D00 Q1 P01 +50 * Center in X axis
N20 D00 Q2 P01 +50 * Center in Y axis
N30 D00 Q3 P01 +50 * Semiaxis in X
N40 D00 Q4 P01 +30 * Semiaxis in Y
N50 D00 Q5 P01 +0 * Starting angle in the plane
N60 D00 Q6 P01 +360 * End angle in the plane
N70 D00 Q7 P01 +40 * Number of calculation steps
N80 D00 Q8 P01 +30 * Rotational position of the ellipse
N90 D00 Q9 P01 +5 * Milling depth
N100 D00 Q10 P01 +100 * Feed rate for plunging
N110 D00 Q11 P01 +350 * Feed rate for milling
N120 D00 Q12 P01 +2 * Setup clearance for pre-positioning
N130 G30 G17 X+0 Y+0 Z-20 * 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
X
Y
50
50
30
50