
5.FEED FUNCTION NC FUNCTIONS B-63322EN/03
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5.2 CUTTING FEED
After an F code, specify the feedrate value for linear interpolation (G01),
circular interpolation (G02 and G03), or the like.
5.2.1 Tangential Speed Constant Control
Cutting feed is controlled so that the tangential feedrate is always set at a
specified feedrate.
5.2.2 Cutting Feedrate Clamp
A common upper limit can be set on the cutting feedrate along each axis
with parameter No. 1422. If an actual cutting feedrate (with an override
applied) exceeds a specified upper limit, it is clamped to the upper limit.
When the cutting feedrate along an axis exceeds the maximum feedrate
for the axis as a result of interpolation, the cutting feedrate is clamped to
the maximum feedrate.
5.2.3 Feed Per Minute (G94)
With the per minute feed mode G94, tool feed rate per minute is directly
commanded by numerical value after F.
Least command increment Cutting feed rate range
0.001mm,deg 0.0001 to 240000mm/min,deg/min
0.0001mm,deg 0.0001 to 100000mm/min,deg/min
0.0001inch 0.00001 to 240000inch/min
0.00001inch 0.00001 to 100000inch/min
(If the input unit differs from the machine unit, the feedrate range differs
from the above table.)
NOTE
The above feed rates are limits according to the NC’s
interpolation capacity. When the whole system is
considered, there are also limits according to the
servo system. For details, see Appendix A.