Programming manual.
CNC 8070
6.
TECHNOLOGICAL FUNCTIONS
Machining feedrate (F)
·98·
(REF: 1709)
Understanding how the CNC calculates the feedrate.
The feedrate is measured along the tool path, either along the straight line (linear
interpolations) or along the tangent of the indicated arc (circular interpolations).
When only the main axes are involved in the interpolation, the relationship between the
components of the feedrate on each axis and the programmed "F" is the same as between
the displacement of each axis and the resulting programmed displacement.
When rotary axes are involved in the interpolations, the feedrate of these axes is calculated
so the beginning and the end of their movement coincides with the beginning and the end
of the main axes. If the feedrate calculated for the rotary axis is greater than the maximum
allowed, the CNC will adapt the programmed "F" so the rotary axis can turn at its maximum
speed.
Feedrate direction on linear and circular interpolations.
Fx
F x
x
2
y
2
+
--------------------------------------------
=
Fy
F y
x
2
y
2
+
--------------------------------------------
=
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