HEIDENHAIN TNC 426 PB/M Technical Manual page 692

The "meander" cycle digitizes a 3-D model in meanders (successive back-and-
forth lines) in the predefined range.
Z
Y
X
The "contour lines" cycle digitizes a 3-D model level-by-level in contour lines
within a predefined range. This level-by-level digitizing is used mainly for
surfaces with steep edges.
Z
Y
X
6 – 362 HEIDENHAIN Technical Manual TNC 426, TNC 430