
8.CONTROL FUNCTION LASER FUNCTION B-64663EN/01
- 230 -
Feedrate clamp by arc radius
To ensure that the acceleration in an arc block does not exceed the
permissible value, this function calculates the maximum permissible
speed v for an arc with the program-specified radius r, using the arc
radius R and the maximum permissible speed V (parameter setting)
for this radius, as described below. If the specified feedrate exceeds
the speed V, this function automatically clamps it to the speed v.
Assuming that
V
2
Maximum permissible acceleration =
R
R: Arc radius V: Feedrate for the arc radius R
then, the maximum permissible speed v for an arc with the radius r can
be determined with the following formula:
Vr/Rv ×=
The smaller the specified arc radius, the lower the maximum
permissible speed v. To prevent it from decreasing extremely, the
maximum permissible speed v can be set to the setting of parameter
No. 1732 (lower limit on the feedrate clamp by arc radius) when it
decreases below the setting of parameter No. 1732.
N1 N5 N9 N1 N5 N9