298 Programming: Q Parameters
9.11 Programming Examples
Example: Convex sphere machined with end mill
Program sequence
îš„ This program requires an end mill.
îš„ 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.
îš„ You can determine the number of contour cuts
through the angle increment in the plane
(defined in Q18).
îš„ The tool moves upward in three-dimensional
cuts.
îš„ 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 *
Winkelschritt im Raum
N60 Q6 = +45 *
Kugelradius
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 tool 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
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