Filter
Top Products
6 The Feed
50
Fig. 6.4.5-3
Fig. 6.4.6-1
Deceleration and acceleration will be
commenced at distances L
l
and L
g
before and
after the corner, respectively. In the case of
(circles) arcs, distance L
l
and L
g
will be
calculated by the control along the arc.
Distances L
l
and L
g
will be defined in
parameters DECDIST and ACCDIST,
respectively.
The value of override can be selected as a percent in parameter CORNOVER. The override will
begin to be effective at distance L
l
before the corner, and will be effective over distance L
g
behind
the corner. The values of feed override and corner override will be taken into account together by
the control:
F* feed override * corner override.
Write G09 in the particular block to program an exact stop in state G62.
6.4.6 Internal Circular Cutting Override
With the cutter compensation on (G41, G42), the control
will automatically reduce the feed in machining the inside
surface of an arc so that the programmed feed will be
effective along the cutting radius. The feed in the center of
the tool radius is
where F
c
is the (corrected) feed of the tool-radius center
R is the programmed radius of circle
R
c
is the corrected radius of circle
F is the programmed feed.
The lower limit of automatic feed reduction is set by parameter CIRCOVER, in which the minimum
override can be specified as a percent. The override for the circle radius is multiplied by the values
of feed and corner override before it is issued.