HEIDENHAIN MANUALPLUS 620 User Manual page 206

Center of curvature as reference and normal position
Programming:
Pattern center <> center of curvature
Pattern radius = curvature radius
Normal position
These commands arrange the slots at the distance of the pattern
radius plus curvature radius about the pattern center.
Example: Center of curvature as reference, normal position
N.. G402 Q4 K30 A0 XK5 YK5 H0
N.. G303 I0 J0 R15 A-20 W20 B3 P1
Center of curvature as reference and original position
Programming:
Pattern center <> center of curvature
Pattern radius = curvature radius
Original position
These commands arrange the slots at the distance of the pattern
radius plus curvature radius about the pattern center while keeping the
starting and ending angle.
Example: Center of curvature as reference and original position
N.. G402 Q4 K30 A0 XK5 YK5 H1
N.. G303 I0 J0 R15 A-20 W20 B3 P1
206
Circular pattern, normal position
Circular slot
Circular pattern, original position
Circular slot
ISO Programming