HEIDENHAIN TNC 640 User Manual page 440

12
Q511 Feed rate factor in %? Factor Q511
influences the feed rate for full recessing, i.e.
when a recess is cut with the entire tool width
CUTWIDTH. If you use this feed rate factor,
optimum cutting conditions can be created during
the remaining roughing process. That way you
can define the roughing feed rate Q478 so high
that it permits optimum cutting conditions for
each overlap of the cutting width (Q510). The TNC
thus reduces the feed rate by the factor Q511
only when recessing with full contact. In total this
can lead to reduced machining times. Input range
0.001 to 150
Q462 Retraction behavior (0/1)? Q462 defines
the retraction behavior after recessing.
0:
1:
contour diagonally and then retracts it
Q211 Dwell time / 1/min? A dwell time can be
specified in revolutions of the tool spindle, which
retards the retraction after the recessing on the
floor. Retraction is only performed after the tool
has remained for Q211 revolutions. Input range 0
to 999.999
440
The TNC retracts the tool along the contour
The TNC first moves the tool away from the
Cycles: Turning | RADIAL RECESSING
(Cycle 861, DIN/ISO: G861)
Q463=+0 ;LIMIT TO DEPTH
Q510=+0.8 ;RECESSING OVERLAP
Q511=+100 ;FEED RATE FACTOR
Q462=0 ;RETRACTION MODE
Q211=3 ;DWELL TIME IN REVS
12 L X+75 Y+0 Z-25 FMAX M303
13 CYCL CALL
HEIDENHAIN | User's manual for cycle programming | 10/2017