HEIDENHAIN TNC 640 (34059x-05) ISO programming - Manual (Page 238)

Programming: Programming contours
6.5 Path contours – Polar coordinates
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TNC 640 | User's ManualDIN/ISO Programming | 1/2015
Example: Helix
%HELIX G71 *
N10 G30 G17 X+0 Y+0 Z-20 *
Definition of workpiece blank
N20 G31 G90 X+100 Y+100 Z+0 *
N30 T1 G17 S1400 *
Tool call
N40 G00 G40 G90 Z+250 * Retract the tool
N50 X+50 Y+50 * Pre-position the tool
N60 G29 * Transfer the last programmed position as the pole
N70 G01 Z-12,75 F1000 M3 * Move to working depth
N80 G11 G41 R+32 H+180 F250 * Approach first contour point
N90 G26 R2 * Connection
N100 G13 G91 H+3240 Z+13.5 F200 * Helical traverse
N110 G27 R2 F500 * Tangential exit
N120 G01 G40 G90 X+50 Y+50 F1000 * Retract the tool, end program
N130 G00 Z+250 M2 *