
B-64663EN/01 LASER FUNCTION 8.CONTROL FUNCTION
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Rapid traverse
In rapid traverse, acceleration/deceleration is performed with
acceleration/deceleration before interpolation and travel is performed
with linear-type positioning. Either the linear or bell-shaped type can
be selected as the acceleration/deceleration type. The speed during
travel and the acceleration of acceleration/deceleration before
interpolation can be determined as follows:
(1) Speed during travel
Of the axes of travel, the lowest value as calculated with the
following formula is assumed the speed during travel.
Travel distance of the block
Feedrate on each axis
(parameter No. 1420)
×
Travel distance of each axis
(2) Acceleration of acceleration/deceleration before interpolation
- For the linear type
Of the axes of travel, the lowest value as calculated with the
following formula is assumed the acceleration of linear
acceleration/deceleration before interpolation during travel.
Feedrate on each axis
(parameter No. 1420)
Travel distance of the block
Time constant for each axis
(parameter No. 1620)
×
Travel distance of each axis
- For the bell-shaped type
The speed determined from the acceleration described
above is multiplied by the time constant specified in
parameter No. 1621 (rapid traverse bell-shaped
acceleration/deceleration time constant for each axis) for the
axis that yields the smallest value with the above formula.
Speed
Time
tb tb
ta
tc
tb tb
ta
tc
Linear acceleration/deceleration
Bell-shaped acceleration/deceleration
ta: Depends on the linear acceleration.
tb: Bell-shaped time constant
tc: Bell-shaped acceleration/deceleration
time
tc = ta + tb
ta is not constant, but varies with the rapid
traverse rate and rapid traverse time
constant for the specified axis.
tb is determined with the axis.