HEIDENHAIN iTNC 530 (340 422) ISO programming - Manual (Page 191)

HEIDENHAIN TNC iTNC 530 191
6.5 P
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To cut a thread with more than 16 revolutions
...
N80 G01 Z-12.75 F1000 M3 *
N90 G11 G41 H+180 R+32 F250 *
N100 G26 R2 * Tangential approach
N110 G98 L1 * Identify beginning of program section repeat
N120 G13 G91 H+360 Z+1.5 F200 * Enter pitch directly as incremental Z value
N130 L1.24 * Program the number of repeats (thread revolutions)
N999999 %HELIX G71 *