
B--63003EN--1/02
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
585
The tool is decelerated (or accelerated) over multiple blocks until the
feedrate becomes 0.
Feedrate
Time
Single block function specified
CAUTION
1 Depending on the stop point and remaining blocks, two or
more acceleration/deceleration operations may be
performed.
2 When the single block function is specified, an
acceleration/deceleration curve recalculatio n is required
while the tool is moving along an axis. So, the tool is not
always decelerated over the minimum number of blocks
before stopping.
When a change in the specification of the dry run function or feedrate
override function results in a change in the specified feedrate (feedrate
change due to an external cause) while look--ahead bell--shaped accelera-
tion/deceleration before interpolation is being used, control is performed
as described below.
After the current acceleration/deceleration operation brings the tool to a
specified feedrate and is terminated, the tool is accelerated or decelerated
to the new target feedrate.
The tool is accelerated or decelerated from the current feedrate to the
specified feedrate.
How the tool is stopped
when decelerated over
multiple blo cks
Dry run/feedrate override
While the too l is b eing
accelerated or
decelerated when the
specification of the dry
run function or feedrate
override function is
changed
While the tool is not
being accelerated or
decelerated when the
specification of the dry
run function or feedrate
override function is
changed