
PROGRAMMING22. RISC PROCESSOR
B–63534EN/02
618
X–axis
feedrate
N1
N2
Y
X
N3
N4
N6
N7
N8
Tangent
feedrate
N1 N5 N9
N1 N5 N9
N9
N5
Y–axis
feedrate
Fig. 22.1.2 (b) Example of Determining the Feedrate with the Acceleration
The method of determining the feedrate with the acceleration differs
depending on the setting of parameter FNW (bit 6 of No. 19500).
If “0” is set, the highest feedrate that does not cause the permissible
acceleration set for parameter No. 8470 to be exceeded is assumed to be
the deceleration feedrate. In this case, the deceleration feedrate differs
depending on the travel direction even if the shape is the same, as shown
in the figure below.
(Example)If a circular shape with a radius of 10 mm is specified
with small line blocks
The feedrate is
higher in these
directions.
Tangent feedrate
Time
F6000
Parameter FNW (bit 6 of No. 19500) = 0
Permissible acceleration = 1000 mm/s
2
(on all axes)