HEIDENHAIN ITNC 530 - 6-2010 DIN-ISO PROGRAMMING User Manual page 206

Example: Circular movements with Cartesian coordinates
%CIRCULAR G71 *
N10 G30 G17 X+0 Y+0 Z-20 *
N20 G31 G90 X+100 Y+100 Z+0 *
N40 T1 G17 S4000 *
N50 G00 G40 G90 Z+250 *
N60 X-10 Y-10 *
N70 G01 Z-5 F1000 M3 *
N80 G01 G41 X+5 Y+5 F300 *
N90 G26 R5 F150 *
N100 Y+85 *
N110 G25 R10 *
N120 X+30 *
N130 G02 X+70 Y+95 R+30 *
N140 G01 X+95 *
N150 Y+40 *
N160 G06 X+40 Y+5 *
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Define blank form for graphic workpiece simulation
Call tool in the spindle axis and with the spindle speed S
Retract tool in the spindle axis at rapid traverse
Pre-position the tool
Move to working depth at feed rate F = 1000 mm/min
Approach the contour at point 1, activate radius compensation G41
Tangential approach
Point 2: first straight line for corner 2
Insert radius with R = 10 mm, feed rate: 150 mm/min
Move to point 3: Starting point of the arc
Move to point 4: end point of the arc with G02, radius 30 mm
Move to point 5
Move to point 6
Move to point 7: End point of the arc, circular arc with tangential
connection to point 6, TNC automatically calculates the radius
Programming: Programming Contours