
B-64663EN/01 LASER FUNCTION 8.CONTROL FUNCTION
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To reduce the speed from speed F3 to speed F2, deceleration must
start at point 1.
To reduce the speed from speed F2 to speed F1, deceleration must
start at point 2.
Because look-ahead of up to 40 blocks can be performed, deceleration
can extend over several blocks.
(Acceleration example)
During execution, acceleration is performed so that the speed
specified for one block is achieved.
Speed
Time
N1 N2
F1
F2
F3
Specified speed
Speed after
acceleration/deceleration
before inter
olation
Automatic corner deceleration
Using for reference the axis for which the ratio of the actual speed
difference to the permissible speed difference is the largest of the axes
for which the speed difference on each axis between blocks exceeds
the setting (parameter No. 1783), this function calculates the speed at
a corner as described below, and decelerates the tool to achieve that
speed at the block joint.
The speed changes on the respective axes (Vx, Vy, ...) during
movement at the specified speed F are compared with the settings of
parameter No. 1783 (Vprm-x, Vprm-y, ...). If the speed change on any
axis exceeds the corresponding parameter setting,
−
=
...
y-Vprm
Vy
xVprm
Vx
maxRmax
、
,
the speed (Fc) is determined as given below and deceleration is
performed at the corner.
where
Rmax
1
FFc
×=
For example, assuming that the specified feedrate is 1000 mm/min and
the permissible speed difference (parameter No. 1783) is 500 mm/min,
deceleration is performed as shown in the next figure if the tool
movement direction changes by 90 degrees from X axis to Y axis.