
PROGRAMMING
B–63534EN/02
22. RISC PROCESSOR
619
If “1” is set, the feedrate is determined with not only the condition that the
permissible acceleration on each axis is not exceeded but also the
condition that the deceleration feedrate is constant regardless of the travel
direction if the shape is the same.
If 1 is set for this parameter, the deceleration feedrate determined with the
feedrate difference or acceleration may be up to 30% lower than that
determined if 0 is set.
The tangent
feedrate is
constant.
Tangent feedrate
Time
F6000
(Example)If a circular shape with a radius of 10 mm is specified
with small line blocks
Parameter FNW (bit 6 of No. 19500) = 1,
radius = 10 mm, permissible acceleration = 1000 mm/s
2
(on all axes)
NOTE
In circular interpolation, the tangent feedrate is constant
regardless of the setting of the parameter.
This function is enabled when parameter ZAG (bit 4 of No. 8451) is set
to 1.
Fig. 22.1.2 (c) During ascent on the Z–axis
q
Fig. 22.1.2 (d) During descent on the Z–axis
Example of determining
the feedrate with the
cutting load