
B-63943EN-1/02 7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL
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In such a case, set bit 3 (BCG) of parameter No. 7055 to 1. Then, the
internal acceleration and vector time constant of
acceleration/deceleration before interpolation are changed to make the
acceleration/deceleration pattern as close as possible to the optimum
bell-shaped acceleration/deceleration before interpolation based on a
specified acceleration/deceleration reference speed, and so
acceleration/deceleration time is reduced.
cceleration/deceleration curve
Specified
feedrate
Feedrate
T1'
T2' T2'
There are three methods for specifying the acceleration/deceleration
reference speed.
(1) Specifying the speed using an F in a G05.1 Q1 block
(2) Setting the speed on parameter 7066
(3) Setting the speed specified with the F command issued at the
start of cutting as the reference speed
When F is specified in a G05.1Q1 block, the specified feedrate is
assumed to be the acceleration/deceleration reference speed. This
command can be used only in the feed per minute mode.
If no F command is specified in a G05.1Q1 block, the feedrate
specified in parameter No. 7066 is assumed to be the
acceleration/deceleration reference speed. If 0 is set in parameter No.
7066, the F command specified in the cutting start block is assumed to
be the acceleration/deceleration reference speed.