See "possible feed rate input – HEIDENHAIN TNC 620 (81760x-02) User Manual
Page 104

Programming: Fundamentals, file management
3.2
Opening programs and entering
3
104
TNC 620 | User's Manual
HEIDENHAIN Conversational Programming | 2/2015
Possible feed rate input
Soft key
Functions for setting the feed rate
Rapid traverse, non-modal. Exception: If
defined before an
APPR block, FMAX is also
in effect for moving to an auxiliary point
(see "Important positions for approach and
departure", page 211)
Traverse feed rate automatically calculated in
TOOL CALL
Move at the programmed feed rate (unit of
measure is mm/min or 1/10 inch/min). With
rotary axes, the TNC interprets the feed rate
in degrees/min, regardless of whether the
program is written in mm or inches
Define the feed per revolution (units in mm/rev
or inch/rev). Caution: In inch-programs, FU
cannot be combined with M136
Define the tooth feed (units in mm/tooth or
inch/tooth). The number of teeth must be
defined in the tool table in the
CUT column.
Key
Functions for conversational guidance
NO
ENT
Ignore the dialog question
End the dialog immediately
Abort the dialog and erase the block