
B--63003EN--1/02
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
594
XY plane
Z
30 deg
45
deg
60
deg
90
deg
Area 1
Area 2
Area 3
Area 4
CAUTION
The feedrate determination function that is based on cutting
load uses an NC command to determine the direction of
movement along the Z-- axis. This means that the d irection
of movement along the Z--axis cannot be found if the
movement along the Z--axis is subject to manual
intervention with manual absolute on/off function set to on,
or if the mirror image function is used with the Z --axis. So,
never use these functions when using feedrate
determination based on cutting load.
In a block for which the automatic feedrate control function is enabled,
the ignoring of all feed commands (F commands) can be specified by
setting bit 7 (NOF) of parameter No. 8451. The feed commands are:
(1)Modal F command specified before a block for which the automatic
feedrate control function is enabled
(2) Modal F command and F command specified in a block for which the
automatic feedrate control function is enabled
Note, however, that specified F commands and modal F commands are
stored in the CNC.
This means that in a block for which the automatic feedrate control
function is disabled, a modal F command of (1) or (2) is used instead of
a modal F command calculated by the automatic feedrate control
function.
If a calculated feedrate exceeds the maximum allowable feedrate for
automatic feedrate control, specified in parameter No. 8465 or with an F
command, the feedrate is clamped to the maximum allowable feedrate or
F command, whichever is smaller.
Ignoring F code
commands
Other examples of
feedrate determination
conditions