HEIDENHAIN ITNC 530 - PILOT SMART NC Manual page 120

Additional parameters on the tool detail form:
U
DL: Delta length for tool T
U DR: Delta radius for tool T
U DR2: Delta radius 2 (corner radius) for tool T
U M function: Any miscellaneous function M
U
Spindle: Direction of spindle rotation. As a default, smarT.NC sets M3
U Tool preselect: If needed, this is the number of the next tool for faster
tool change (machine-dependent)
Additional parameters on the milling parameters detail form:
U Rounding radius: Rounding radius of the tool midpoint path at inside
corners
U Feed rate factor in %: Percentage factor by which the TNC reduces
the machining feed rate as soon as the tool moves within the material
over its entire circumference during roughing. If you use the feed rate
reduction, then you can define the feed rate for roughing so large that
there are optimum cutting conditions with the specified path overlap
(global data). The TNC then reduces the feed rate as per your definition
at transitions and narrow places, so the machining time should be
reduced in total.
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